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RF/Microwave??

Triggering alarm when RF transmitter is out of range

Posted: 30 Sep 2011 ?? ?Print Version ?Bookmark and Share

Keywords:915MHz receiver? alarm? transmitter?

Here's a design idea explaining how a 915MHz receiver can sound an alarm when a transmitter moves beyond a predetermined boundary.

The receiver circuit illustrated in this application note sounds an audio alarm when the MAX2623 transmitter moves beyond a designated perimeter. The trigger distance depends on conditions and antenna design. In tests in a home environment with simple wire antennas, the distance was about five feet (1.5m).

View the PDF document for more information.

Originally published by Maxim Integrated Products at www.maxim-ic.com as "Alarm Sounds When RF Transmitter is Out of Range".





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