Following on from my PPM Encoder mods (PPM Encoder Updated), I needed to be able to test and tune the main rotor speed controller. I figured that a small setup was needed to simulate the pulses generated by the RPM sensor, that was motor driven and speed controllable by the ACM board.
So on the right of the photo, you see a my RPM test set consisting of plastic bucket lid, with a hole to allow light onto a sensor below. The lid is bolted to a small brushless motor, and the ESC (which I think I just burned out) is connected to the throttle servo output on the ACM.
When it's fired up, the PPM Encoder is measuring the RPM pulse timing and outputting the result to Ch5 into the APM chip. However, due to the method I calculate the timing, the resolution on the RPM speed is useless.
So as far as the PPM encoder mods go - its back to the drawing board.
(The things we do in the name of progress)....