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Simple Audio Amplifier Circuit Design using LM386

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According to wikipedia.org, an Audio Amplifier is a an electronic amplifier that amplifies low-power audio signals (20 – 20 000 Hz) to a level suitable for driving loudspeakers. Key design parameters for audio amplifiers are frequency response, gain, noise, and distortion. Below schematic shows the design of a Simple Diagram using . The LM386 is a 8 pin MSOP package power amplifier designed for use in low voltage application. (click image to enlarge)

Audio Amplifier Circuit Diagram

Audio Amplifier Circuit Parts List:

RESISTORs
R1 ___10 kOhm
R2 ___10 kOhm
R3 ___10 kOhm
R4 ___10 kOhm
R5 ___10 kOhm
R6 ___100 kOhm
R7 ___100 kOhm
R8 ___10 kOhm
R9 ___10 kOhm
R10 __10 Ohm

DIODEs
D1 ___1N4148
D2 ___1N4148

IC
LM358AN
LM386N

CAPACITORs
C1 ___1 uF
C2 ___1 uF
C3 ___1 uF
C4 ___10 uF
C5 ___1 uF
C6 ___10 uF
C7 ___33 nF
C8 ___0.1 uF
C9 ___470 uF
C10 __100 uF

Other
9V Vcc
Speaker
Stereo input jack
Aux input

Reference: www.ece.ucsb.edu/yuegroup/Teaching/ECE2C/Lab/Lab1a.pdf

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