Hello I am trying to build a light gate system. The idea being that the beam is broken when you pass the first point and a counter is started until the second beam is broken. I have seen other posts on her on about IR emitter and photo detector. I have tried this. However they pick up ambient light and also I need a spacing of bout a meter at least between the emitter and detector. Can anyone suggest a suitable emitter / detector pairing or even another way around it?
Thanks
Thanks