Lm386 Audio Amplifier Circuit Diagram. Building a basic functional circuit for the lm386 is dead easy. Resistor r2 10k has been used as a pull up resistor to connect condenser mic to the positive supply voltage to provide the power to the mic.
Circuit diagram of the lm386 based audio amplifier is shown in the circuit. Below is the top and bottom layer of pcb layout. Hi there today we will be learning how to make an audio amplifier using smd version of lm386.
Now that you ve seen the bare minimum of what it takes to make an audio amplifier with the lm386 lets build a higher fidelity version with an adjustable gain control.
The circuit is using lm386 amplifier ic maximum gain of the circuit can be set between 20 to 200 the 10uf capacitor from pin 1 to 8 is used to set the gain of 200. Most of the component values in this circuit aren t critical. Diy lm386 audio amplifier. Before using this project test it using the 6v battery.
