grimjordax
New Member
Here is my USB charger that I made about 1.5 years ago. It has a bit of wear and tear on it but is still holding up. It can output over an amp of current to any USB chargeable device. The display shows voltage and current draw. It shuts off after 60 seconds automatically if no current is drawn. The screen is a .96" OLED and that is a 6V solar cell on top so it charges itself just by laying around, preferably in the sun. It has 6000 mAh of Li-poly onboard and can be charged by either solar, mini-usb or DC 6V input. It uses an LV-BOOST, Allegro ACS713 current monitor, FET and a Picaxe 20X2. The charger board is by Sparkfun.
nutsandbots.blogspot.com
nutsandbots.blogspot.com