I have been trying to get these optic inturrept switches going for a few days. I did some reading on google searches and such, but to no ivail. The photo diode side wors fine if I supply my own light. I am using the interupt on m lathe spindle.

I tried using seperate power supply before I got a resistor set from radio hack. I have multiple pieces so it's not just one that may be dead.


I am a little stalled here and any help would be great.