M matty New Member Aug 24, 2009 #1 I am looking for a circuit that on detecting a camera flash ( i am currently using a 3mm NPN photo transistor, maplin part no YY66 ) will send a neg signal after a 3sec delay ( ish ). I have a 5v supply
I am looking for a circuit that on detecting a camera flash ( i am currently using a 3mm NPN photo transistor, maplin part no YY66 ) will send a neg signal after a 3sec delay ( ish ). I have a 5v supply