Electronic Doorbell Circuit

Posted on Mar 12, 2013

When the doorbell switch is pressed, the two monostable stages are activated in sequence, applying bias to a pair of voltage-controlled resistor stages. These then modulate the outputs from a pair of tone generators. The resulting signals are fed to an audio amplifier,

Electronic Doorbell Circuit
Click here to download the full size of the above Circuit.

then to the speaker.

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