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Audio circuits design projects and schematics

Audio circuits design projects and schematics, various audio amplifiers circuits with diagram and schematic.

STA543SA 2.1 class AB power amplifier circuit

A simple class AB power amplifier circuit electronic project can be designed using the STA543SA a 3-channels audio amplifier IC with DC volume control.
This class AB power amplifier circuit based on the STA543SA will provide a 24 watts output power on a single channel and 7 watts output power on the rest of channels . All output channels require a 4 ohms load .

Circuit Diagram: 
STA543SA 2.1 class AB power amplifier circuit
Electronic Circuits: 

Electret microphone amplifier circuit using transistors

This electret microphone amplifier circuit is designed using common electronic components . This microphone amplifier circuit uses an electret microphone capsule, but can be an dynamic microphone, which have a low resistance. This circuit requires a supply voltage between 5 and 10 volts, is recommended to use a supply voltage of 9 volts DC . Since the circuit has a very low power consumption (about 1.5m), circuit can be powered using a 9 volt battery. The values for R1, C3 and R8 are for Philips LBC1055/00 electret capsule.

Circuit Diagram: 
Electret microphone amplifier circuit
Electronic Circuits: 

TDA7250 250 watts audio amplifier circuit

This 250 watts audio amplifier circuit TDA7250 audio driver manufactured by SGS Thomson, can be designed a very simple high power audio amplifier electronic project using few external electronic parts .

Circuit Diagram: 
TDA7250 250 watts audio amplifier circuit
Electronic Circuits: 

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