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.
Hey-
I need to make a sound activated switch.
It has to have adjusted sensitivity, fast response time, release time<3s, and small off time delay.
I know I need a 555 timer and a comparator, but could someone please show me a circuit diagram to do this? Thank you.
-Tom
A common application for a sound activated switch is on transceivers. VOX is one term that describes it. Search on amateur radio and VOX and you'll probably find some good designs. Not the only place to look but certainly worth checking out.
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