Mini Audio Amplifier Circuit With BC547

Description: The following circuit shows about Mini Audio Amplifier Circuit Schematic Diagram. Features: power less than 3mA, small output, using push-pull output, earpiece with earphone, small dimension, BC 547 emitter voltage 1k and 470R resistors. Component: BC547 Transistor, Capacitor, Resistor, Diode, Battery, Electret Mic, Earpiece.