Introduction: Battery Powered USB Charger
In this instructable I will be making a tutorial on building your own portable battery powered charger to charge all your USB devices!
Step 1: Obtain Parts
-9v battery clip (two is better but one works fine)+ batteries (rechargeable are more efficient)
-Female USB port (salvaged mine from a USB hub
-7805 regulator (or any other regulator that outputs 5v@1-2 amps.
-Altoids tin (or any other housing)
Step 2: Identify Pins
You need to identify the pins for the positive and negative on the USB and also the input/output of the regulator.
Step 3: Begin Soldering/Assembly
-If you are using one battery skip this step: solder the positive of one clip to the positive of the other battery clip and do the same to the negative (series)
-Solder the negative coming from power to the first pin of your regulator
-Solder the negative from the USB and the negative from the power to the middle pin of the regulator
-Solder the positive from the USB to the third pin of your regulator