Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
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
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