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Use guitar amplitude signal as a switch to light a bulb Answered


I'd like to light a bulb by using a guitar as a switch.
My problem is I don't know where to plug the guitar into.
Is it some kind of switch I have to tweak, or is it some kind of resistor.
I've attached an image to explain the electric circuit. 



5 years ago

Lol your idea is good, I've thought of the same thing but only activates when you pop the whammy bar. I've also considered adding a gun apparatus to shoot out a blue flare when you nail a solo.


5 years ago

Duuuuuuude, don't do that. You could fry yourself and worse, the guitar.
You need a circuit to isolate the high voltage stuff from the mains from the guitar. What you are looking for is a "color organ" or sound reactive light circuit. Your guitar signal is run through a small amplifier circuit which then triggers a relay to turn on your light bulb or better LEDs. You can have a microcontroller like an arduino control the relay or use some simple transitors to light up the bulb when the sound gets louder. Good luck.