MrClean
Well-known member
Did you measure the resistance of your wire? .3 amps at 12 volts would put your wire at 40 ohms of resistance. If you increase the resistance you will decrease the current. Your walwart is good for 12 volts at 2 amps which would be 6 ohms of resistance minimum. Anything less will be more amps then your walwart is capable of. Like short circuiting. It usually takes a bit of that to burn them out though. Meter the output with no load and see if it's putting out 12 volts. If it isn't, it's cooked. Also meter your wife, perhaps it is higher resistance then needed.