I have heard people using OTG cable and a USB cable to charge one mobile from another mobile. I was wondering, Could I use the micro USB port directly to power external devices like LEDs.
I cut up the adapter wire and connected the micro USB in my mobile. The external 2 leads have no output at all.
I searched on the internet to how to turn on the power of the micro USB in mobile. I didn't find any material. I searched app store to find an app that uses a protocol to power on the USB port. But No results
How can I do it?