Okay, I don't know exactly how to go about saying this. I've been doing some camping and hiking lately and especially when I go out for a few days at a time, I always struggle with some of my electronics staying charged. I really do not use them when I'm out there, but it would kind of suck if something bad actually happened and I needed communication or a GPS to get the hell out of there. So I was thinking about building a simple-ish way to make a USB charger that runs off of solar power. I'm not electrical engineer so maybe I'm off. Here's my initial thoughts. 6V 2W Solar panel -> MAX712 NiMH Charger circuit -> 2x 1.5V NiMH -> MC4063A Buck boost -> 5V USB Out Now I don't know if MC4063A is the right chip for this job. I know the MintyBoost can use a Max756 or a LT1302. Does anyone have any ideas in that regard. Anyone have any better ideas? Thanks.