Lm386 5v Audio Amplifier Circuit Diagram. We need to supply an audio signal to the input of the amplifier pin 3. It can drive loads from 4 ωto 32 ω.
Circuit diagram of the the bass booster amplifier. If you use the external circuit a replace the rx with a jumper wire in the pcb. The power output is around 550 mw at 16 ohm speaker impedance.
Four electrolytic capacitors are used in this circuit.
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. You can also check the lm386 datasheet here. Before using this project test it using the 6v battery. Most of the component values in this circuit aren t critical.
