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 did not build this, but it should give some noise. Q1 can be any NPN transistor, R7 adjusts the output amplitude. Instead of a 9 volt battery, you can use a power supply of up to 15 volts.
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