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.
This design found in the web is working very nicely:
The breadboard circuit is for counting something that is breaking the light beam to the photocell but the principle is the same. The 10K VR will fine tune the intensity of the light needed to trigger the relay.
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