i would like to make it blink with the beat. thanks
i would use one of the many instructables on making leds blink with music, then replace the led with a relay, so that you can switch the higher voltage/amperage load on the stop light.
actually, you could follow one of the blinking christmas lights to music circuits. just replace the christmas lights with your stop light.
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There's an intersection somewhere that's about to have a pile-up!
Just to clarify: are we talking about a stop light that is strung up directing traffic, or a stop light that is sitting on your table at home?
One is probably illegal, while the other is good fun... Well, I guess both are good fun, but only one is good fun for everyone.
Other than that, I have no clue. I know that it is very possible, but whether or not you could insert a CD (tape?!?!) and press play and watch as it blinks to any old music, I have no clue.