Intercom circuit diagrams
Room Monitor
This circuit allows audio monitoring of a remote location and so doubles as a room monitor or baby alarm. Read more...Doorphone Intercom
A simple Intercom made with a single transistor and low power audio amplifier LM386. The circui uses 8 ohm speakers, which also double as a microphone. Read more...High Quality Intercom
A very high quality intercom, which may also be used for room monitoring. Read more...
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