Chosen Solution
How can I turn on 3.7v lamp whit changer iPhone?which pin ? 1-5 pin don’t worked
Best bet on this is to do the following Scrape all the pastic off of the lighting cable end. Use multimeter and probe each pin until you find your power and ground. But keep in mind that most lamps require more then the 5volts that a USB will put out. Are you using small LEDS that you are going to power?
that is battery i cant find which pin power and grand on cable charger
