This one was throwing me off last night, audio was a full sine wave, three thoughts:
1. Op amps. Maybe the most professional.
2. Resistors. Pretty much move -5v to 0v. I think it compresses the range to less than 1024
3. Skip the voltage and watch the frequencies. May still need to fix negative voltages.
Oh, there is the high voltage that just was not made to be controlled. For the love of everything sacred, make sure you break the hot lead at the relay! You have to make everything the same, and this is hard with a plug you could plug in backwards now....
Maybe use a pair or two in my hacked POE cable to push audio split from the FM transmitter
This will be pretty nice, since everything is LED this will control.... max 16A of lights, better run a new circuit off the breaker box for this project!
Time to get a blank sketch running that is aware of all components. Maybe I will use the SD card to hold different show programming. That would make it easier to add and edit shows.
