Arduinos are fun to tinker with, but there's one problem. Once you've built something cool, you pretty much have to tear it down to use your board for another project. Sure, you can always buy multiple Arduino boards or proto shields, but what if you want to turn your creation into something a bit more permanent and a lot more compact? Say hello to Permaduino, a small battery-powered Arduino prototype board that just launched on Indiegogo. It features an Atmega328P (natch), two AAA battery holders with a 3 t
