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.
Here's a game show circuit that locks out all others after the first button is pressed (such as used in the Jeopardy™ game), with a bare minimum of parts.
It uses just one small SCR and push-button switch for each contestant to light their respective LED indicator, which then blocks all the rest...
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