Siren alarm simulates star trek red alert


Posted on Sep 28, 2012

The signal starts at a low frequency, rises for about 1.15 seconds to a high frequency, ceases for about 0.35 seconds, then starts rising again from a low frequency, and so on ad infinitum.


Siren alarm simulates star trek red alert
Click here to download the full size of the above Circuit.

it sounds like the star trek red alert.




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