Carrier-Current Baby-Alert Receiver Circuit

Posted on Jul 19, 2012

The baby-alert receiver is comprised of three transistors: Q2, which is configured as a high-gain linear amplifier; Q3, which serves as both an amplifier and detector; and Q4. which is essentially used as a switch; and a few additional components.

Carrier-Current Baby-Alert Receiver Circuit
Click here to download the full size of the above Circuit.

It sounds an alarm BZ1 on receipt of a 125-kHz signal from an alarm transmitter via the 120-V power lines.

Leave Comment

characters left:

New Circuits



Popular Circuits

Two-phase ac motor driver
Bandswitched Grid Dip Meter
Melody Generator Circuit using UM66
usb powered mobile phone battery
inverter circuit diagram
temperature sensor circuit
Electronic Transformer Applications
Light dimmer circuit
Long Delay Timer Circuit
network wiring tester schematic circuit
Auto-voltage starting time relay control circuit