hmm so with the multimeter connected before i plug in the usb, i get a 4 V output. I have 4x 1n4001 diodes in series so i don't know why its only a 1V decrease? anyway, Ill try using this with the headset power held down before plugging in the usb to see if that works. maybe 4V is too much for...
GOAL: Power a 2x AAA battery powered headset with a USB port
METHOD: 3x diode in series
RESULT: Failure
Detailed Methods:
Connected three diodes head to foot. Connected USB 2.0 (side with USB to computer) red wire to 1st diode @ the opposite side of the band. Connected an empty red...