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Far OT for my creative friends.
45 years ago I was in a bar in Chicago and they had a laser deal that
plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution |
Far OT for my creative friends.
On Sun, 14 Jan 2018 23:37:16 -0500,
wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. |
Far OT for my creative friends.
On Mon, 15 Jan 2018 02:23:21 -0500, wrote:
On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com |
Far OT for my creative friends.
On Mon, 15 Jan 2018 13:47:33 -0500, wrote:
On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! |
Far OT for my creative friends.
On 1/15/2018 1:47 PM, wrote:
On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. Greg: Check this out: https://www.youtube.com/watch?v=qwawj0A8P6w |
Far OT for my creative friends.
On 1/15/2018 3:59 PM, Mr. Luddite wrote:
On 1/15/2018 1:47 PM, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror.Â* It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis.Â* There are lots of devices with fairly bright lasers these days.Â* Perhaps you could get one on EBAY or at a garage sale.Â* Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. Greg:Â* Check this out: https://www.youtube.com/watch?v=qwawj0A8P6w Or, for a more advance project: https://www.youtube.com/watch?v=xszp5UQLB2g |
Far OT for my creative friends.
On Mon, 15 Jan 2018 13:47:33 -0500,
wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com The 2 mirror solution was my first thought and I tried it with regular mirrors but the glazing caused the ghost problem. My second swing at it was a single mirror that I could swing in 2 axis with a spring as a center pivot. That was a 1st surface dental mirror. Just when I was starting to get results the laser quit and I shelved the project. These days the laser is the trivial part. Red and green laser diodes can be salvaged from old pointers or simply ordered as a part, dirt cheap. You can also scavenge some very powerful blue lasers from DVD drives but they are strong enough to be a serious eye hazard. It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. |
Far OT for my creative friends.
On Mon, 15 Jan 2018 15:59:29 -0500, "Mr. Luddite"
wrote: On 1/15/2018 1:47 PM, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. Greg: Check this out: https://www.youtube.com/watch?v=qwawj0A8P6w That was where the 2 lasers I scored once I moved here went. We did a similar thing to that with mirrored flower containers on turn tables for the Cooper Group (major Holiday In franchiser) at big 3 day conference they had here in Ft Myers. Judy had the contract for decorating at the conference when we had the flower store. One of the containers was a big hex shaped thing (6 mirrors) and the other was a disco ball sort of thing on a big cylinder. By positioning the lasers right we had beams bouncing around the whole room. A little tobacco smoke really got it going. The staff decided a smoke machine would really be cool and they had one in their disco. What they didn't know is the smoke detectors in the disco were disabled. Imagine a bunch of Cooper Group executives standing in the parking lot in their underwear at 5AM (most with a hangover) waiting for the South Trail Fire Department to tell them it was a false alarm. They kept the lasers, they lost the smoke machine, |
Far OT for my creative friends.
On Mon, 15 Jan 2018 16:01:40 -0500, "Mr. Luddite"
wrote: On 1/15/2018 3:59 PM, Mr. Luddite wrote: On 1/15/2018 1:47 PM, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror.Â* It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis.Â* There are lots of devices with fairly bright lasers these days.Â* Perhaps you could get one on EBAY or at a garage sale.Â* Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. Greg:Â* Check this out: https://www.youtube.com/watch?v=qwawj0A8P6w Or, for a more advance project: https://www.youtube.com/watch?v=xszp5UQLB2g I have a couple of those laser projectors you light up the front of your house with that I got real cheap after christmas 2016. We have one lighting up the trees out back, way cooler than shining one on a flat surface but the other one stopped moving and I am going to take it apart to see how they did it. I assume this is some kind of motorized prism/mirror sort of thing. It splits the beam into about 64 separate sub beams that then get split into 64 more beams that expand and contract around that point. I am sure that once I get inside I will be amazed at how simple that thing really is. |
Far OT for my creative friends.
On 1/15/2018 4:47 PM, wrote:
On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com The 2 mirror solution was my first thought and I tried it with regular mirrors but the glazing caused the ghost problem. My second swing at it was a single mirror that I could swing in 2 axis with a spring as a center pivot. That was a 1st surface dental mirror. Just when I was starting to get results the laser quit and I shelved the project. These days the laser is the trivial part. Red and green laser diodes can be salvaged from old pointers or simply ordered as a part, dirt cheap. You can also scavenge some very powerful blue lasers from DVD drives but they are strong enough to be a serious eye hazard. It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. The only laser "pointer" system I had any participation in (in a small way) was the 500 terawatt (no typo), 192 beam NIF laser at the Lawrence Livermore National Laboratory. (LLNL) Many of the beam handling optics for the laser bay received optical coatings using one of the optical coaters my company built. We originally built the system for the Laboratory for Laser Energetics (LLE) at the University of Rochester for a similar, but smaller, 60 beam laser system. When LLNL solicited optical coating services to supply the coated optics for NIF, nobody except the LLE could meet the power and damage specs. It was quite a feather in our and the Lab for Laser Energetics caps for a while and we ended up with additional contracts directly with Lawrence Livermore. Both the NIF laser system and the Omega laser system at the LLE UofR fire a multi-beam, high power laser from multiple but symmetrical directions onto a tiny "target", compressing it. In the case of the NIF system, it creates a nuclear fusion reaction by compressing hydrogen. High tech stuff that I only understand the surface level of. |
Far OT for my creative friends.
On 1/15/2018 5:21 PM, Mr. Luddite wrote:
On 1/15/2018 4:47 PM, wrote: On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror.Â* It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis.Â* There are lots of devices with fairly bright lasers these days.Â* Perhaps you could get one on EBAY or at a garage sale.Â* Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com The 2 mirror solution was my first thought and I tried it with regular mirrors but the glazing caused the ghost problem. My second swing at it was a single mirror that I could swing in 2 axis with a spring as a center pivot. That was a 1st surface dental mirror. Just when I was starting to get results the laser quit and I shelved the project. These days the laser is the trivial part. Red and green laser diodes can be salvaged from old pointers or simply ordered as a part, dirt cheap. You can also scavenge some very powerful blue lasers from DVD drives but they are strong enough to be a serious eye hazard. It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. The only laser "pointer" system I had any participation in (in a small way)Â* was the 500 terawatt (no typo), 192 beam NIF laser at the Lawrence Livermore National Laboratory. (LLNL)Â* Many of the beam handling optics for the laser bay received optical coatings using one of the optical coaters my company built.Â* We originally built the system for the Laboratory for Laser Energetics (LLE) at the University of Rochester for a similar, but smaller, 60 beam laser system.Â* When LLNL solicited optical coating services to supply the coated optics for NIF, nobody except the LLE could meet the power and damage specs.Â* It was quite a feather in our and the Lab for Laser Energetics caps for a while and we ended up with additional contracts directly with Lawrence Livermore. Both the NIF laser system and the Omega laser system at the LLE UofR fire a multi-beam, high power laser from multiple but symmetrical directions onto a tiny "target", compressing it.Â* In the case of the NIF system, it creates a nuclear fusion reaction by compressing hydrogen. High tech stuff that I only understand the surface level of. Forgot a link for those interested in the NIF program: https://en.wikipedia.org/wiki/National_Ignition_Facility#Driver_laser |
Far OT for my creative friends.
On 1/15/2018 5:10 PM, wrote:
On Mon, 15 Jan 2018 15:59:29 -0500, "Mr. Luddite" wrote: On 1/15/2018 1:47 PM, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. Greg: Check this out: https://www.youtube.com/watch?v=qwawj0A8P6w That was where the 2 lasers I scored once I moved here went. We did a similar thing to that with mirrored flower containers on turn tables for the Cooper Group (major Holiday In franchiser) at big 3 day conference they had here in Ft Myers. Judy had the contract for decorating at the conference when we had the flower store. One of the containers was a big hex shaped thing (6 mirrors) and the other was a disco ball sort of thing on a big cylinder. By positioning the lasers right we had beams bouncing around the whole room. A little tobacco smoke really got it going. The staff decided a smoke machine would really be cool and they had one in their disco. What they didn't know is the smoke detectors in the disco were disabled. Imagine a bunch of Cooper Group executives standing in the parking lot in their underwear at 5AM (most with a hangover) waiting for the South Trail Fire Department to tell them it was a false alarm. They kept the lasers, they lost the smoke machine, I imagine it would be fun to build, especially for someone with your interests but I bought a programmable, multi-pattern laser projector (actually, high powered LEDs) for the stage we had at the guitar/music shop. It worked amazingly well and only cost about $80. It had a microphone in it as well so the display could react to the music being played if desired. Couple of times I combined it with a fog machine that really made it look cool. Got sick of the fog smell though. |
Far OT for my creative friends.
On Mon, 15 Jan 2018 16:47:56 -0500, wrote:
It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. --- This email has been checked for viruses by AVG. http://www.avg.com |
Far OT for my creative friends.
John H wrote:
On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! Over $100 off MSRP here but I'm sure you can find it cheaper! https://www.eurooptic.com/KIMBER-330...m--330010.aspx |
Far OT for my creative friends.
On Mon, 15 Jan 2018 18:48:43 -0500, Alex wrote:
John H wrote: On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! Over $100 off MSRP here but I'm sure you can find it cheaper! https://www.eurooptic.com/KIMBER-330...m--330010.aspx No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. |
Far OT for my creative friends.
|
Far OT for my creative friends.
On Mon, 15 Jan 2018 18:54:03 -0500, John H
wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. |
Far OT for my creative friends.
On 1/15/18 8:32 PM, wrote:
On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. |
Far OT for my creative friends.
On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze
wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. |
Far OT for my creative friends.
On 1/15/2018 9:19 PM, wrote:
On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. The fountain systems I am aware of are controlled by a MIDI program where you can synchronize the valve operations to the music as MIDI "events". You can adjust when they occur time-wise relative to the music to adjust for any delays or for desired timing. For example, an event to turn on a water valve could occur prior to the time you want the fountain flow to peak relative to the music. Most of (if not all) of the elaborate Christmas displays on homes and landscaping that are synchronized to music is done using a MIDI program and controller. |
Far OT for my creative friends.
On Mon, 15 Jan 2018 22:06:44 -0500, "Mr. Luddite"
wrote: On 1/15/2018 9:19 PM, wrote: On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. The fountain systems I am aware of are controlled by a MIDI program where you can synchronize the valve operations to the music as MIDI "events". You can adjust when they occur time-wise relative to the music to adjust for any delays or for desired timing. For example, an event to turn on a water valve could occur prior to the time you want the fountain flow to peak relative to the music. Most of (if not all) of the elaborate Christmas displays on homes and landscaping that are synchronized to music is done using a MIDI program and controller. Yup. I had an IBM buddy who was on the leading edge of this MIDI thing, putting together light shows for bands on old IBM DOS PCs. Compared to WAV or even MP3, a MIDI is a tiny file. He got started using it to build a piano tuner program that he ran on a "luggable" 5162 (basically a full sized PC/AT with a handle on it). Once he got started he saw the possibilities. This guy took one of the original early outs and I lost track of him. |
Far OT for my creative friends.
|
Far OT for my creative friends.
On 1/15/2018 11:26 PM, wrote:
On Mon, 15 Jan 2018 22:06:44 -0500, "Mr. Luddite" wrote: On 1/15/2018 9:19 PM, wrote: On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. The fountain systems I am aware of are controlled by a MIDI program where you can synchronize the valve operations to the music as MIDI "events". You can adjust when they occur time-wise relative to the music to adjust for any delays or for desired timing. For example, an event to turn on a water valve could occur prior to the time you want the fountain flow to peak relative to the music. Most of (if not all) of the elaborate Christmas displays on homes and landscaping that are synchronized to music is done using a MIDI program and controller. Yup. I had an IBM buddy who was on the leading edge of this MIDI thing, putting together light shows for bands on old IBM DOS PCs. Compared to WAV or even MP3, a MIDI is a tiny file. He got started using it to build a piano tuner program that he ran on a "luggable" 5162 (basically a full sized PC/AT with a handle on it). Once he got started he saw the possibilities. This guy took one of the original early outs and I lost track of him. The synthesized sound generators in early MIDI systems were pretty poor. Instruments really didn't sound authentic at all and they had a very phony sound. But today, using sampled sounds of actual instruments the sound generators are very good. Some of the most highly rated, and used keyboards by professionals and bands today (like the Yamaha MOXF8) can produce sounds that are not distinguishable from the real thing. Here's a video of the Yamaha MOXF8. The concert piano sound starts about 50 seconds into the video: https://www.youtube.com/watch?v=Q7ZgiIbfUNw This is a Yamaha P-115. It uses a lesser version of the sound engine used in the more expensive Yamaha keyboards. I bought one of these for Mrs.E. It's not bad for a relatively inexpensive keyboard for home use: https://www.youtube.com/watch?v=GamF6mSkgFY Mrs.E. loves listening to piano music but she doesn't really play (nor do I). I download MIDI piano files from the Internet onto a thumbdrive for her to listen to, playing on her P-115. |
Far OT for my creative friends.
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote:
On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. |
Far OT for my creative friends.
|
Far OT for my creative friends.
On Tue, 16 Jan 2018 07:12:58 -0500, "Mr. Luddite"
wrote: On 1/15/2018 11:26 PM, wrote: On Mon, 15 Jan 2018 22:06:44 -0500, "Mr. Luddite" wrote: On 1/15/2018 9:19 PM, wrote: On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. The fountain systems I am aware of are controlled by a MIDI program where you can synchronize the valve operations to the music as MIDI "events". You can adjust when they occur time-wise relative to the music to adjust for any delays or for desired timing. For example, an event to turn on a water valve could occur prior to the time you want the fountain flow to peak relative to the music. Most of (if not all) of the elaborate Christmas displays on homes and landscaping that are synchronized to music is done using a MIDI program and controller. Yup. I had an IBM buddy who was on the leading edge of this MIDI thing, putting together light shows for bands on old IBM DOS PCs. Compared to WAV or even MP3, a MIDI is a tiny file. He got started using it to build a piano tuner program that he ran on a "luggable" 5162 (basically a full sized PC/AT with a handle on it). Once he got started he saw the possibilities. This guy took one of the original early outs and I lost track of him. The synthesized sound generators in early MIDI systems were pretty poor. Instruments really didn't sound authentic at all and they had a very phony sound. But today, using sampled sounds of actual instruments the sound generators are very good. Some of the most highly rated, and used keyboards by professionals and bands today (like the Yamaha MOXF8) can produce sounds that are not distinguishable from the real thing. Here's a video of the Yamaha MOXF8. The concert piano sound starts about 50 seconds into the video: https://www.youtube.com/watch?v=Q7ZgiIbfUNw This is a Yamaha P-115. It uses a lesser version of the sound engine used in the more expensive Yamaha keyboards. I bought one of these for Mrs.E. It's not bad for a relatively inexpensive keyboard for home use: https://www.youtube.com/watch?v=GamF6mSkgFY Mrs.E. loves listening to piano music but she doesn't really play (nor do I). I download MIDI piano files from the Internet onto a thumbdrive for her to listen to, playing on her P-115. Like everything in the computer biz MIDI has become a whole lot better. My buddy was just amazed at how well he could reproduce and analyse the sound he needed to tune a piano. I don't really know much about the process. I just helped him on the computer hardware side. Electronic instruments are certainly better too. We have come a long way from Max Crook's electronic keyboard on "Runaway" but at the time we thought it was magic. He certainly managed to take a mediocre bubble gum song to the top of the charts with it. |
Far OT for my creative friends.
On Tue, 16 Jan 2018 09:59:31 -0500, Keyser Soze
wrote: On 1/15/18 8:40 PM, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I've never had a laser sight, but I do have a laser sighting in kit, and it does what it is supposed to do...it speeds up the process of sighting in a firearm that's new to you, or sighting in a new red dot or scope. I change out and swap around the add-on sights on my rifles, and the sighting in kit makes it easy-peasy to get right on paper. CZ does a very good job of sighting in its firearms before it ships them. I was shooting bullseyes with the SCORP right out of the box with the "iron" sights. I have always had pretty good luck with the factory sights. It never ocurred to me they would be that far off. Precision shooting with iron sights is more art than science anyway. My 2 "target" pistols (a target model Woodsman and a OM Colt 38) have the Micro adjustible rear sight and I have tweaked them a bit. My .44 Ruger Carbine had scope mounts but I always thought a scope sort of defeated the purpose of a fast handling little carbine. A red dot might be appropriate. I just never used it enough to justify the cost. The 4+1 ammo capacity sort of limits its usefullness. |
Far OT for my creative friends.
On Tue, 16 Jan 2018 06:32:06 -0800 (PST), Its Me wrote:
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. I saw that also. I was thinking of it when I wrote the sentences above. 'Blindspot', I think. |
Far OT for my creative friends.
On Tue, 16 Jan 2018 09:59:31 -0500, Keyser Soze wrote:
On 1/15/18 8:40 PM, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I've never had a laser sight, but I do have a laser sighting in kit, and it does what it is supposed to do...it speeds up the process of sighting in a firearm that's new to you, or sighting in a new red dot or scope. I change out and swap around the add-on sights on my rifles, and the sighting in kit makes it easy-peasy to get right on paper. CZ does a very good job of sighting in its firearms before it ships them. I was shooting bullseyes with the SCORP right out of the box with the "iron" sights. Well of course. I mean, after all, it is *you* you're talking about, right? |
Far OT for my creative friends.
John H wrote:
On Mon, 15 Jan 2018 18:48:43 -0500, Alex wrote: John H wrote: On Mon, 15 Jan 2018 13:47:33 -0500, wrote: On Mon, 15 Jan 2018 02:23:21 -0500, wrote: On Sun, 14 Jan 2018 23:37:16 -0500, wrote: On Sun, 14 Jan 2018 22:09:37 -0500, wrote: 45 years ago I was in a bar in Chicago and they had a laser deal that plotted the 2 channels of the sound system as a Lissajous pattern on the back wall. I tried to make one using an old Neon laser and mirrors on speaker drivers about 40 years ago. It was almost working when the free used laser I had crapped out. Now that laser diodes cost less than a stick of gum I wanted to try again. What is the best way to steer the laser? Piezo crystal or some kind of mirror solution === I'm not an expert on piezo crystal optics but I think you'll have more fun engineering an electromechanical linkage to a mirror. It will also be more intuitive and use readily available components. That was my thinking before I started working on laser printers but these days it is a pretty mature science and those parts may be as cheap as lasers. I found out the first time down the rabbit hole, you need a 1st surface mirror. A regular silver on glass mirror creates a ghost image. I ended up with a dental mirror sans handle, epoxied to a coil spring with arms going out to 2 small speaker cones 90 degrees out. The laser I had was a neon, about 1.5" in diameter and a foot long that needed a HV power supply to spark up. These days you can get a diode that runs on 4.5vdc. Just about the time I got the geometry right, my laser broke. I came up with another laser down here but it was pressed into service at the flower store and went with the store. That design was still a little funky and I wanted to try something different. I really don't believe that in the 70s they were using a crystal tho. We did us one in a 3800 but it only deflected in one axis. I may be missing a whole different concept in steering a laser. I thought Richard may have dabbled in this stuff. === I'm assuming you'd need two mirrors - one for X axis positioning and a second for the Y axis. There are lots of devices with fairly bright lasers these days. Perhaps you could get one on EBAY or at a garage sale. Of course you'd need to be happy with either red or green. I've got some green gun sight lasers that are fairly bright, and there are lots of laser pointers around that are allegedly bright enough to blind aircraft pilots. --- This email has been checked for viruses by AVG. http://www.avg.com Greg could buy this for me. I'd take out the laser and send it to him -- free! http://www.kimberamerica.com/micro-9-cc Such a deal! Over $100 off MSRP here but I'm sure you can find it cheaper! https://www.eurooptic.com/KIMBER-330...m--330010.aspx No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. I had a cheap one that I put on a Glock rail and found it to be pretty useless. I gave it away. I do have a Surefire on my Beretta that I keep loaded in the house. That thing is crazy bright. |
Far OT for my creative friends.
wrote:
On Mon, 15 Jan 2018 20:45:21 -0500, Keyser Soze wrote: On 1/15/18 8:32 PM, wrote: On Mon, 15 Jan 2018 18:24:22 -0500, wrote: It has been pointed out to me that you can just get a "visualization" file for a MP3 player that does this exact thing on a big screen TV. === Yes, but it wouldn't synchronize with your music. Why not if it was the MP3 player generating the visualization? That is what visualizations are. Usually they are so complex the linkage to the music is not immediately apparent. Don't forget the water fountains that are synchronized to the Muzak, er, music, that you enjoy. That is another strange thing that fascinates me. I have thought about trying to make something like that for the pool since I have a pump going anyway. The trick is finding valves that open and close fast enough. The diaphragm valves in washing machines, sprinkler systems and ice makers won't cut it. I don't know if Wayne noticed it but I am roughed in for a fountain or waterfall sort of thing in a corner of the pool already. There us an additional 2" and 3/4" pipe going there, in addition to a return from the pool pump that is on a valve now. (pipe is cheap and easy to put in when the ground is open. Later not so much) I did make a water cannon (Bellagio style) that would shoot a quart sized slug of water across the river once for my neighbor. He wanted to wet down people speeding in the no wake. He never actually had the chance to use it tho. The diaphragm style 1" sprinkler valve was fine for that but I was unloading a tank of air, not the water itself. The water was sitting in a pipe in the river. A couple of cubic feet of 100 PSI air gave it quite a ride. Thanks to "Modern Marvels" I found out that is how Bellagio does it. These have something added to the water: https://www.youtube.com/watch?v=0XqIAWK60-8 |
Far OT for my creative friends.
Its Me wrote:
On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. |
Far OT for my creative friends.
On Tuesday, January 16, 2018 at 7:58:31 PM UTC-5, Alex wrote:
Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. You can't hide the crack of a round going supersonic. That happens outside the suppressor. If you want to be really quiet, you use a bolt action, and there is no "action" sound. A semi-auto lets all kinds of noise escape. Agreed, the movie sound effects are not real. |
Far OT for my creative friends.
On 1/16/18 7:58 PM, Alex wrote:
Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest.Â* A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh.Â* At long range a sniper would *not* be using a red dot.Â* Of course, Hollywood suppressors also barely make a sound.Â* Limousine liberals believe all this stuff. Many real suppressors barely make a sound.Â* You just hear the action of the firearm unlike the strange sound they use in movies. Almost, assuming you are using a firearm with a short barrel and subsonic ammo, and if you are using a firearm without a reciprocating bolt/action...you can have a really quiet experience. My CZ bolt action rifle was damned quiet with the suppressor and subsonic ammo, but my CZ semi-auto rifle isn't as quiet, because of the bolt. My CZ SCORP is quiet with a borrowed suppressor and subsonic 9mm ammo, but noisier than the CZ .22 LR rifles. |
Far OT for my creative friends.
On Tue, 16 Jan 2018 19:58:23 -0500, Alex wrote:
Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. They don't all go 'phhhhttt'? |
Far OT for my creative friends.
On Tue, 16 Jan 2018 21:03:11 -0500, Keyser Soze wrote:
On 1/16/18 7:58 PM, Alex wrote: Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest.* A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh.* At long range a sniper would *not* be using a red dot.* Of course, Hollywood suppressors also barely make a sound.* Limousine liberals believe all this stuff. Many real suppressors barely make a sound.* You just hear the action of the firearm unlike the strange sound they use in movies. Almost, assuming you are using a firearm with a short barrel and subsonic ammo, and if you are using a firearm without a reciprocating bolt/action...you can have a really quiet experience. My CZ bolt action rifle was damned quiet with the suppressor and subsonic ammo, but my CZ semi-auto rifle isn't as quiet, because of the bolt. My CZ SCORP is quiet with a borrowed suppressor and subsonic 9mm ammo, but noisier than the CZ .22 LR rifles. Whatever it is, yours is better! |
Far OT for my creative friends.
John H wrote:
On Tue, 16 Jan 2018 19:58:23 -0500, Alex wrote: Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. They don't all go 'phhhhttt'? You would think so. It must be a stock soundbite they all share. |
Far OT for my creative friends.
On Wed, 17 Jan 2018 20:05:55 -0500, Alex wrote:
John H wrote: On Tue, 16 Jan 2018 19:58:23 -0500, Alex wrote: Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. They don't all go 'phhhhttt'? You would think so. It must be a stock soundbite they all share. A "recycle bin" suppressor for a .22rf sounds about like my CO2 BB gun. That is a piece on 1.5" PVC pipe, caps and a hand full of milk bottle caps. I have to believe the one Harry has several hundred dollars in must be quieter. |
Far OT for my creative friends.
On 1/17/18 9:57 PM, wrote:
On Wed, 17 Jan 2018 20:05:55 -0500, Alex wrote: John H wrote: On Tue, 16 Jan 2018 19:58:23 -0500, Alex wrote: Its Me wrote: On Tuesday, January 16, 2018 at 7:06:33 AM UTC-5, John H wrote: On Mon, 15 Jan 2018 20:40:44 -0500, wrote: On Mon, 15 Jan 2018 18:54:03 -0500, John H wrote: No way would I ever buy one. I see people at the range with those things and laugh my ass off. They'll shine them at a target and watch them bounce around. In a few seconds they must get embarrassed and shut 'em off. Never to be seen again. Lasers are not intended for slow fire bullseye shooting. They are really for quick point and shoot situations or times when you can't establish your normal hold or sight picture. (weak hand shooting from behind cover or something) I had one on my Ruger KP90 for a while and took it off. It seemed like more of a distraction than a help. This was an early one that did not really have great switch operation tho. I forgot about it until now. That might be a good laser to play with for this project. I think folks are fooled by the movies. They see the little red dot show up on someone's forehead or chest, very still and perfectly centered, and think, "By damn, that's what I need!" Saw a show last night with a person "on the run" in a town square, and a still red dot appeared on his chest. A guy came up to him and told him a sniper had him in his sights so he'd better give up the goods. Heh. At long range a sniper would *not* be using a red dot. Of course, Hollywood suppressors also barely make a sound. Limousine liberals believe all this stuff. Many real suppressors barely make a sound. You just hear the action of the firearm unlike the strange sound they use in movies. They don't all go 'phhhhttt'? You would think so. It must be a stock soundbite they all share. A "recycle bin" suppressor for a .22rf sounds about like my CO2 BB gun. That is a piece on 1.5" PVC pipe, caps and a hand full of milk bottle caps. I have to believe the one Harry has several hundred dollars in must be quieter. On a CZ bolt action .22LR rifle with my "Sparrow" suppressor, CCI "standard velocity" subsonic ammo produces a sound not unlike the proverbial "pffffft." On my CZ semi-auto rifle, the same suppressor and ammo setup produces a sound like an office electric staple gun. It does not produce a sound like an ammo retort. Most of the noise comes from the action of the bolt. The latter is very similar to the sound produced by semi-auto .22LR pistols...the bolt action is louder than the round. This is a good video on the Sparrow...and at the end, instead of shooting at steel targets, he shoots into a dirt bank and you can "hear" how little noise is produced. https://www.youtube.com/watch?v=xKGXW5tp71Q Here's the suppressor I'm getting for my CZ SCORP. This guy has it mounted on an SBR, which I do not have... the actual testing starts around 2:39 into the video. The last ammo tested is 158 grain subsonic...and it is damned quiet. https://www.youtube.com/watch?v=nstV2MHhp4o |
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