Audio Amplifier using LM386

Audio amplifier - LM386

LM386 is a power amplifier designed to be used in low voltage consumer applications. Typical applications are like portable AM/FM amplifier, TV sound systems. It requires minimum external parts and operate from wide range of voltage starting from as low as 4 volt.

Below is the version of the circuit designed by me in one of my projects. It has a Gain of 50 with Bass boost.

Part list

1. C1 - 100 µf 

2. C2 - 10 µf

3. C3 - 0.01 µf

4. C4 - 0.1 µf

5. C5 - 0.01 µf

6. C6 - 220 µf

7. R1 - 10 K

8. R2 - 1.2 K

9. R3 - 10 

10. VR1 - 10 K

11. 9 volt Battery

12. IC - LM386 

C3 and C4 can be replaced by 0.05 or 0.047 µf capacitor. 

This amplifier is ideal for Ipod and cell phones and can be assembled in small box.