Carrier-Current Baby-Alert Transmitter Circuit

  
The baby-alert transmitter is built around an LM324 quad op amp (Ul), two LMC555CM CMOS oscillator/timers (U2 and U3), and a few support components. The transmitter sends a signal on receipt of a sound at MIC1.
Carrier-Current Baby-Alert Transmitter Circuit - schematic

It has a frequency of around 125 kHz and can be used to trigger an alarm receiver.




Leave Comment

characters left:

New Circuits

.