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 .
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.
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 .
