An autopilot system using an android phone. The PPM signal goes to the microphone input on the phone and and a modified PPM signal comes out of the audio jack to drive the servos.
The android phone stabilizes the plane using the built-in gyroscopes and GPS functionality is also going to be implemented, with the RTH (return to home) function upon signal loss.
06/30/2014 at 03:34 •
PPM (Pulse Position Modulation) Is used by RC transmitters and recievers to transmit data for the Rc channels. Old FM recievers (The one I have) use this type of signal. I hacked the FM reciever and located the PPM output, then I used an arduino based serial oscilloscope to check the signal.
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