I looked up color organs. All the schematics I found look like they run off a single voltage. 120 or 12v ac. I would like to use 5v logic to control the 120v AC in my circuit. Further googling leads me to think the best way of doing this is with opto-isolators and SCRs.
I'm wondering for the sake if wondering if it would be possible to make a circuit like this with no isolation. Not safe i know, and I don't plan to do it. but I am curious.
If I take the 120v AC coming in, and use two rectifier diodes going opposite directions on the hot line, I will end up with pulsing DC, positive voltage on one diode, negitive on the other, referanced off the neutral or common line, correct?
Now If I added a 5v battery into the circuit to control the SCRs, can that be grounded on the neutral line?
I havn't found any circuits that do somthing like this. I can't think of what else uses 5v logic (or any low DC voltage) to control line voltage so I can look up circuits.