Archives For solar charger


I know there are plenty of USB chargers out there for you to build. But here’s one that doesn’t use a voltage regulator or an IC chip to power it. The basic concept is to use 4 – AAA rechargeable batteries (1.2V a piece) to power the USB and a couple of solar cells to charge the batteries. If you’ve done the basic math you’re probably wondering how 4.8V (4 x 1.2) is going to power a USB device which requires 5VDC. Well that’s actually how I came up with the idea. Continue Reading…