I am planning a project very similar to the one seen in the following gallery. (http://imgur.com/a/G7iww) I like the idea of having my phone plugged into the same unit for charging. My only concern is I only want to have one power cable being attached. The power cable needs to power both an Arduino Micro, some LEDs, and charge the phone, so I will likely be using a 5V wall wart or something similar (high enough power rating).
My big concern is making sure the battery is charged properly and is not over charged. I don't want to just plug it into a constant 5V-1A circuit, and ruin the battery. I have seen a few charging circuits online (like this one), but did not know if this was a safe option.
Any suggestions would be greatly appreciated. I am looking for a package that is relatively easy to use/solder and is reliable/safe. There are plenty of charging circuits, but are not exactly user friendly for small-ish hobby projects.
For what its worth, it is an iPhone 6 that needs to be charged, so it is a 3.8V 1800mAh lithium ion battery.
Best Answer
Charging lithium batteries is handled by the charging circuit found inside your phone , this circuit handles undervoltage and overvoltage protection of the lithium battery for safety concerns and battery life.
The charger you plug into the wall ( AC mains ) contains mainly a transofrmer and rectifing diodes.
So simply plug 5v into the phone is safe and no need for any circuit. you can just use usb connector and connect only the power pins leave everythng unconnected and you are good to go.