I have some LED Christmas Lights here with those functions boxes that change the way the leds blink/fade. I would like to control the sections through an Arduino. So, I disassembled the function box and measured the voltage with a multimeter to find out how much energy I would have to use to turn them on.
Turns out that the output is about 190V DC (input is 220V AC). How can I get this voltage from another source and be able to control it?