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.
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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.
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