Hi, I have a 7 Channel receiver (Futaba FP R127DF) and I want to interface it with my Arduino.
Does anyone have specific experience with this receiver? I understand it is a very popular model. Will I be able to see all seven of the channels without using all of the Arduino's inputs?
You should be able to hook each output channel's signal line to a digital pin, and the ground line to the Arduino's ground; since there are seven channels, there are only seven digital pins needed - so plenty will be left over for other things (well, depending on what you need to do - if you need more than what is left; 5-11 pins, depending on type; you would need to move to a mega).
The "difficult" part will be decoding the signal; you would essentially be doing the reverse of what the servo library does. You will probably need to use interrupts to do this properly. You would essentially be decoding the PWM coming into the Arduino into a number, which would then indicate what position/function is being performed.