Depth sounder project
 

Hi, guys;

Instead of using the display unit from the Navman depth 2100, i try to
design my own display unit for the transducer of depth 2100.
Anyone have any idea how to interface with this depth transducer by
using the PIC microcontroller? I found that the cable Navman used for
this device is RCA Jack cable. I have no idea about this cable. How can
i interface with this cable to receive the signal from the transducer?
Besides, did anyone know the specification of this transducer?
Thank you so much, guys!!!

bing2005 wrote:
Hi, guys;

Instead of using the display unit from the Navman depth 2100, i try to
design my own display unit for the transducer of depth 2100.
Anyone have any idea how to interface with this depth transducer by
using the PIC microcontroller? I found that the cable Navman used for
this device is RCA Jack cable.
I have no idea about this cable. How can
i interface with this cable to receive the signal from the transducer?
snip

A RCA jack on the video output would probably indicate it is composite
video like. If you have a TV and a composite video modulator you can
try it to see if it works.

The video modulator converts the composite video signal to RF energy on
a specific (and sometimes selectable) TV channel. The modulator is a
small box with a RCA jack on one end and short flat antenna cable with
terminal lugs or coaxial connector on the other end.

There are some issues with frequencies and scan rates and the like but
if the video happens to have much in common with the NTSC composite
video used by most TV set it may work. I think you can still find video
modulators at places like Wal-Mart, that is the little box that was used
to hook real old computers (think Apple, Atari, Amiga, etc.) to TV sets
in the dark ages.

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)

"bing2005" wrote in message
oups.com...
Hi, guys;

Instead of using the display unit from the Navman depth 2100, i try to
design my own display unit for the transducer of depth 2100.
Anyone have any idea how to interface with this depth transducer by
using the PIC microcontroller? I found that the cable Navman used for
this device is RCA Jack cable. I have no idea about this cable. How can
i interface with this cable to receive the signal from the transducer?
Besides, did anyone know the specification of this transducer?
Thank you so much, guys!!!

A depth transducer is usually a Piezo-electric device that just transmits
the pulse and then receives the returned signal.
They don't contain any electronics, so you will need to design and build the
depth sounder, i.e. something to produce the pulse, and then calculate the
depth by the time delay between transmitted pulse and received signal, and
display the result
Considering the sophisticated equipment availlable why build your own?
Why not use the time to go boating instead?