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SOUND_LIGHT_FLASH_TRIGGER

2017-02-04 22:25  
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SOUND_LIGHT_FLASH_TRIGGER
Sound input to the microphone triggers tthe IC monostable circuit which subsequently triggers an SCR, and hence the flash, after a time delay. This delay is adjustable—by varying the monostable on-time—from from 5 milliseconds to 200 milliseconds.