Antonio

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UNITED ARAB EMIRATES
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09etep

MEXICO
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Soldering iron

Description

Headphones amplifier

This circuit was designed to build a headphone amplifier using two LM386 operational amplifiers. When turned on, a NE555 Timer is also powered, which controls a relay that allows you to activate the audio outputs after a few seconds in order to avoid noises when the operational amps are switched on. It can drive headphones and speakers up to a very high impedance and without distortion. It will certainly never be used at maximum volume as the amplifier power is 0.75w per channel, which is enough for headphones. On the circuit there are 2 pins that allow you to turn the amplifier on or off and another 2 that allow you to disable the audio output.

Schematic and Layout

Schematics

Schematics_LM386_HeadphonesAMP_v.2.0.svg

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Oct 07,2022

879 views

Headphones amplifier

a headphone amplifier built with 2 LM386s and relays to remove the bump on poweron.

879

10.00 (1)

Published: Oct 07,2022

Download Gerber file 22

BOM(Bill of materials)

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