Digital Volume Controller

If you need digital volume control, then this circuit will great for you. Just press......

22 Watt Stereo Audio Amplifier

With one single IC, you can build stereo audio amplifier. The circuit is simple,......

10 LED Sound Level Meter

This is sound level meter for your hand made audio device. This circuit will display......

8 Watt Audio Amplifier

This is mono audio amplifier. If you need stereo amplifier, then build 2 similiar......

18 watt Audio Amplifier using MOSFET

Components list:R1………………2K2 1/4W ResistanceR2………………27K 1/4W ResistanceR3R4………….2K2......

19 Watt Audio Amplifier

19 watt audio amplifier based on single IC LA4440. I've built this circuit once......

Water Level Alarm

More explanation about water level circuit, please go to this page.Description:This......

Headphone Stereo Amplifier

Above image is the schematic diagram of headphone stereo audio amplifier. The left......

Water Activated Alarm

This simple circuit uses timer IC to generate frequency. Emitter current from transistor......

Infrared Switch

Infrared Switch circuit for common use, please visit this page for complete explanation.This......

Sound Effects Alarm Generator

This schematic in very simple and easy to made. The IC produces all the sound effects,......

NiCad Battery Charger

This simple and low cost battery charger uses a single transistor as a constant......

Low Cost Tone Control Circuit

This cheap tone control circuit provides a maximum cut and boost of around 10dB......

Tweeter Crossover

This is tweeter (high frequency speaker) crossover which will filter the treble......

Low Cost Mic Mixer

This is the schematics of a simple low cost mic mixer that can be assembled from......

12 Watt Audio Amplifier

This low cost amplifier is simple and give you good result. Here the op-amp used......

2W Mono Audio Amplifier

This circuit diagram is very simple, very easy to build and will be great idea for......