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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.

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[B]Introduction and Overview[/B] The Secret Knock Detector project is a variation of Steve
Damping factor, and how an amplifier controls voice coil motion.
Current Drive Improves Standard Optical Isolator Linarity For AC Audio Frequency Applications
Simple Modification Allows Linear Potentiometer to Generate A Quasi Audio-Taper Logarithmic Response
Here's a signal injector for those of us like me who don't have a bench full of nice test equipment
Voice Scrambler 2011-01-13
With this circuit you can modify how your voice sounds by changing the pitch of your voice. This ci
FM Transmitters 2010-10-29
I have quite a few so I decided to post many FM transmitter schematics.
This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER for training purpose
This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
Toy Organ 2012-09-17
This circuit produces a tone according to the button being pressed.
This is a microphone pre-amp which I designed for use with a SoundBlaster(TM) AWE 64 Value sound c
Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 ti
AM Radio Receiver 2010-07-06
Here's a very simple AM Radio circuit I've designed couple of years ago. Don't know whether anybody
Night Buzzer 2010-07-06
If you want revenge that won’t kill someone, just make them go insane, have I got the thing for y

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