Re: No soldering PTT solution for a Raspberry pi and Quansheng type radio with CM108?
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I just used one of these daughterboards on both my Raspberry PI APRS nodes. GPIO pins defined in the Direwolf config file. Changed default pin 28 to pin 25 and relay on daughter board works fine? ?
Rick KC0HH
I am not sure about the "no solder part, the pre-made cables (mini-DIN to stereo sound card jacks) are rather expensive ($25 U.S.), but available
Some of these are as low as a couple of dollars U.S.
Same with PTT.? If the radio has a RCA jack for PTT, then maybe something as simple as cutting off the end of an old speaker wire (with RCA) and using a 3V relay board.
Again, maybe a couple of U.S. dollars each - in quantity.
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That could be wired with yo the Pi GPIO with dupont style plugs.? There are version of the relay board with headers where thge GPIO would connect, so the dupont style connectors would work.
You could probably find some 3.3V realys (without the boards that you could connect with dupont connectors directly.
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Maybe lots of clicking, but that's about the cheapest you are going to get.
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Rob KB8RCO
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