Build a Siren Alarm Simulates Star Trek Red Alert Circuit Diagram

Build a Siren Alarm Simulates Star Trek Red Alert Circuit Diagram. 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 it sounds like the star trek red alert.

 Siren Alarm Simulates Star Trek Red Alert Circuit Diagram


Siren Alarm Simulates Star Trek Red Alert Circuit Diagram

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