Intercom on the LM386 chip. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Intercom on the LM386 chip. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Telephony

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The intercom circuit is based on the integrated amplifier LM386

Intercom on the LM386 chip / Diagram of the intercom.

The circuit uses two 8 ohm speakers that act as both a microphone and a speaker. The potentiometer is used to control the volume of the device. A two-position switch is used to switch between speakers: if one is turned on as a microphone, then the second works as a speaker and vice versa.

The circuit is powered by a 9 V crown battery, or a power supply.

Publication: cxem.net

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