Tiny audio amplifier using LM386

Rajkumar Sharma      http://www.rajkumarsharma.com  

636 

photo

The Tiny Audio Amplifier kit is a good choice for battery operation.  It is based on LM386 IC.

Specifications

  • Power supply – 6 – 12 VDC
  • Output power – 1 W, 8 Ohm
  • The quiescent power drain is only 24 mW when operating from 6 VDC
  • Self-centering output quiescent voltage
  • Onboard PRESET to adjust volume
  • Terminal pins for connecting power supply, audio signal and speaker
  • Power-On LED indicator
  • ON/OFF PCB mounted slide switch for power supply
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 44 mm x 44 mm

Schematic

 

schematic

Parts

parts

Inputs – Outputs configuration

IO

PCB

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