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The Secret Knock Detector Project
2013-01-17
[B]Introduction and Overview[/B]
The Secret Knock Detector project is a variation of Steve
output impedance experiments
2018-07-10
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
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.
Dual-Mode Microphone Pre-Amplifier
2011-12-17
This is a microphone pre-amp which I designed for use with a SoundBlaster(TM) AWE 64 Value sound c
Police Siren (NE555)
2011-06-16
Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 ti
Simple Audio Signal Injector
2011-07-05
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.
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
Simple Telephone Central Project
2010-09-04
This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER
for training purpose
20 Watt Power Amplifier
2011-09-22
This IC chip was designed specifically for use in power boosting applications in automobiles. It is
1.5 Volt Tracking Transmitter
2010-07-06
The current draw for this tracker is 3.7mA, so the 1.5V button cell will last awhile. What the heck
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
Audio Perimeter Monitor
2010-07-06
Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positione
Audio Notch Filter
2010-07-06
At first glance this circuit looks fairly complex, but when broken down,can be divided into high pa
FM Transmitter (#1)
2010-07-06
This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
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