PropAway for FPV will keep the propeller away from the view. A small microntroller in the plane will adapt the speed of the motor to make it match the video camera’s frame rate.
The algorithm will keep constant the speed AND the phase (angle) of the propeller, even in case of external influences such as wind.
In this demo, I try to brake the propeller with my hand, and then with small sheets of paper : see how the command to the ESC is immediately adapted to resist the change.
The visual indication of phase and command to the ESC as seen on this video is made only for debugging or visualization on a connected PC (developped in C# and emguCV)
The microcontroller used is a PIC18F1320 using internal oscillator. The vertical synchro signal from the camera is extracted with a LM1881. In total, only 2 these two chips, 2 capacitors, 1 resistor and a hall sensor are needed.
Still in development, for questions or comments please see full thread on http://www.rcgroups.com/forums/showthread.php?t=1305232
Thank you !