Mini Audio Amplifier
author: Rajkumar Sharma

---

This project is a mini Audio Amplifier based on LM386 IC.

Description

The Mini Audio Amplifier project is a good choice for battery operated gadgets.  It is based on Texas instruments LM386 IC, provides high quality Audio.

Specifications

- Wide power supply input 6 to 12 VDC  
- 500 mW output @ 8 Ohms load
- Takes standard audio signal as input  
- Low quiescent current drain 4 mA IC  
- The quiescent power drain is only 24 mW when operating from 6 VDC  
- Onboard preset for volume adjust  
- Header connector for connecting power supply, audio signal and speaker  
- Onboard power indication LED  
- On/Off PCB mounted slide switch for power supply  
- Four mounting holes of 3.2 mm each  
- PCB dimensions 41 mm x 41 mm

 

Schematic

Parts List

 

PCB