Will this circuit work to make a solar powered USB charger? Answered
Would this work? It's supposed to charge both the batteries and whatever is in the USB, and then when there is no light the batteries will charge the USB. IN914 is to prevent battery discharge, LM7805 is to change voltage to 5V. The question mark is for a a resistor i heard you need to bridge the white and green connections so it works on iphones/itouches. Anyone know which it is?
Link to better image of circuit: http://i27.tinypic.com/n4xq4x.jpg
Using this solar panel: http://www.adafruit.com/index.php?main_page=product_info&cPath=44&products_id=262
EDIT: I realized that I need two solar panels in series to get 12V, because 6V won't be enough because the LM7805 takes 2V. Am I right? In that case, wouldn't it make more sense to put the batteries in series with the USB