Yeah, I’m a telemetry-freak, I know :)
I “accidentally” got me a quite nice Yak 54 with gas-engine and did not have the stuff to get propeller rpm. So I made a small gadget to get info from CDI-box tachometer output to Jeti.
Really simple, just one value needed:
And connections really could not be more simple, here is the schematic:
Check out the the dedicated sensor-page HERE!
Remember to get out to field and enjoy once in a while!