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

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.

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.

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!"

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.

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.

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.

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.

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.

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'?