Build a solar iPod charger
Brian writes: "I looked everywhere for a lightweight solar iPod charger. Nothing fancy, just something I could attach to the top of my backpack. I couldnât find one anywhere, I couldnât even find instructions on how to build one. So, I set about building one for myself. As this was all about getting very light materials, this set-up is very simple but the charger has no protection from branches, rain, or marmots."