How can I indicate a USB charge with an LED?
I've seen some USB ports/chargers out there that have an LED that lights up when you plug the cable in. Is there a simple way to do this? I need the LED to light when the USB cable is plugged in, not when the charger is on. So I could plug in the adapter and nothing would happen, but when I drew current to charge something, the LED would light up. I can't figure out how to do it, so I'm asking you for some aid. Thanks