Multitone Siren Alarm


Posted on Feb 7, 2014

Here the simple schematic of multitone siren alarm circuit. This multitone siren is effective for reverse horns, burlgar alarms, and many others. It generates five various audio tones and is much more earcatching than a single-tone siren. T..


Multitone Siren Alarm
Click here to download the full size of the above Circuit.




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