I'm trying to have a LED strip light up when I play my guitar. I'm told I can use a Darlington transistor to switch on and off the LEDs. It would switch using the current from the output of my amp to the speakers. I can not figure out how to wire in the transistor. I've tried a couple of combinations, but the best result I got was very dim LEDs.
Here is some more info on the set up.
Peavey 6505+ guitar amp speaker output = 120W RMS/44V RMS, selectable 4, 8, or 16 ohm
TIP120 NPN transistor = V(CE): 2.0 V(BE): 2.8 I(C) Max: 8.0A Power Dissipation: 80W
Voodoo Lab power supply = 9, 12,or 18V
LED strip = 24" blue flashing LEDs