Audio
Infrared (IR) Cordless Headphone
This is the schematic diagram of Infrared (IR) cordless headphone. Maybe it also can be called "wireless headphone", but it…
Stereo Digital Volume Control
Here is the circuit diagram of stereo digital volume control. This circuit could possibly be applied for upgrading your manual…
USB Powered, Stereo Computer Speaker
This is the circuit diagram of USB powered stereo computer speaker, or it widely known as multimedia speakers for PCs.…
Electronic Horn
This is an easy, low cost and easy built circuit of an electronic horn which is designed close to quadruple…
Ticking Bomb Sound Generator
Here the low cost and easy build circuit of ticking bomb sound generator. This circuit generates a sound matching to…
Cheap Hearing Aid
Here the cheap hearing aid to help people who have hearing loss. Commercially available assistive hearing devices are quite expensive.…
Mic Condenser Amplifier
This is the circuit diagram of mic condenser amplifier. The low-cost and compact mic condenser audio amplifier described right here…
Electro-Harmonix Soul Preacher
This is the circuit diagram of Electro-Harmonix Soul Preacher pedal. (more…)
150W Power Amplifier
This is the very simple circuit diagram of 150W power amplifier. The circuit is easy enough to built without PCB.…
1500W Power Amplifier
This is a very high 1500W power amplifier circuit diagram by Rod Elliott. The circuit is built using 10 pairs…