Posted on Aug 9, 2012

When activated, the transmitter sends out a 49.890-MHz, AM rf carrier. The.receiver detects, amplifies, and decodes the rf signal, which, in turn, activates a piezo buzzer. The receiver is small enough to carry in a pocket or sit on your workbench.

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

The transmitter is also small and fits easily into a pocket for quick access.

Leave Comment

characters left:

New Circuits



Popular Circuits

Car Headlight Control
Long-Range IR Transmitter
Load Cell with an Arduino
24W amplifier using TDA1516
LM2876 40W audio power amplifier circuit design
5 Minute Digital Clock
Decreasing intermod on the Kenwood TM-733 receivers
Electronic projects