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how to make a sound activated switch? Answered

making led light up win you hit on a drum

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RavingMadStudiosBest Answer (author)2010-03-01

If this is for a drum kit, rather than a single drum, you might want to consider using an impact or vibration-sensitive trigger instead ot a sound-sensitive one, just to minimize spillover sound triggering the wrong light. Maybe piezo switches or something like that? Perhaps hack a Guitar Hero or Rock Band drumset for parts? Just thinking out loud here....

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Jack A Lopez (author)2010-02-28

Do you want it to latch, i.e. the LED turns on and stays on, or do you want it to just sort of flash once with each drum-beat?

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sahilverma (author)Jack A Lopez2011-10-10

Actually I was also wanting to build the same thing and yes I want to have just a flash per beat on each individual drum or the whole drum ( if connected by a single strip of LED)

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jeff-o (author)2010-03-02

I think the bits you need can be found in my Electric Ovaloid Instructable.  It features a sound-activated switch that triggers a string of LEDs when a loud enough sound is detected.

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orksecurity (author)2010-02-28

Long ago, Popular Electronics published a simple circuit which used the output of a standard audio amplifier to trigger a relay. They were using it to advance a slide projector (use one stereo track for your comments, and put a noise on the other whenever it was time to move to the next slide). I don't have the circuit handy, but it was just the relay and a few passive components.... hard to beat that for simplicity.

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