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.
He found a very old circuit on a website in India.
The circuit has one 400mW zener diode and has two zener diodes that are clearly marked 400W!
It uses old SL100 transistors.
His next question will be, "Where can I find the melody IC?" (that hasn't been made for many years)
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