I'm trying to design a circuit to measure the speed of a spoked wheel spinning - using an IR transmitter and detector mounted either side of the wheel the spokes break the IR beam as they pass through. Ive got most of the circuit laid out, and the rest of the components I can find easily, but I'm having trouble finding a suitable IR transmitter and receiver. The distance the beam would have to transmit over would be about 30cm at most. Does anyone have any suggestions/advice? I've literally only started thinking about the project in the last couple of days so any suggestions are welcome!
Thanks all