Here’s a “cool” project: Get a Peltier Thermo-Electric Module, a couple of heat sinks, a usb cable, and some foam-core board. Throw it all together (see video below), and you have a usb-powered mini-fridge.


DIY $5 Mini USB Fridge!

Afterthought: A normal “12 volt” solar panel puts out around 18 volts, which exceeds the rating of the peltier unit I linked to above, but I wonder if a 5v solar USB-charger like the one below would put out enough juice (about .6 amps) to make a solar-powered mini-fridge for camping.