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+--- Thread: Connecting 170kHz depth transducer to Raspberry Pi (/showthread.php?tid=4497)
Connecting 170kHz depth transducer to Raspberry Pi - robifz - 2023-02-27
I have an old B&G Depth Transducer.
It has a 3 wire cable. Red wire, Blue wire and Shield
I would like to connect this to a Raspberry Pi to then read the depth
The transducer transmits data using 170Khz analog signal
Any suggestions how I can do this?
RE: Connecting 170kHz depth transducer to Raspberry Pi - abarrow - 2023-02-27
There is an interesting discussion here https://forum.arduino.cc/t/interfacing-fish-finder-take-2/679629/27?page=2 from someone reverse engineering a depth sounder.
The bottom line is that unless the sounder is actually "smart", you are going to need a circuit that generates the pulse and receives it. Since this is an old model, I think it's unlikely that it is anything more than a transmitter and receiver, needing something else to generate, receive, and interpret the pulses.
RE: Connecting 170kHz depth transducer to Raspberry Pi - bergie - 2023-03-07
There is this piece of kit that can drive many old depth sounders and turn them into NMEA0183:
https://actisense.com/products/dst-2-nmea-0183-digital-transducer/
Shouldn’t be too tricky to go from there to RPi.
I just received mine, so I haven’t had the the to plug it in yet. The plan is to digitise our old NASA depth sounder (I bought the DST-2-150 because of this) and VDO Sumlog paddle wheel sensor.
RE: Connecting 170kHz depth transducer to Raspberry Pi - abarrow - 2023-03-07
This looks very interesting. Please let us know how it works for you.
It's too bad they aren't interfacing to NMEA2000!