Hi guys,
I bought a magician chassis from sparkfun that comes with the wheel encoder boards, but without the sensors. After doing a small amount of research, I thought I try it out making the encoder myself.
I bought a pair receiver and transmitter from a local shop, 2 pins each encased together side by side. I tied both the receiver and transmitter to the 5V output of the arduino board, and and the other end of the receiver to the input pin of the arduino.
However, I discovered that on reflecting the IR light upon any surface only warrants an increase of voltage to 0.2-0.3, which is not enough for the digital pin to go high. (of course, pointing the TV remote works but that's besides the point).
Am I wrong to use digital input? If not, how should I make this work?