Often, we need to power a 5V-craving project of ours on the go. So did [Burgduino], and, unhappy with solutions available, designed their own 5V UPS! It takes a cheap powerbank design and augments … ...

Need a small DC/DC 3W switcher to drop 5V to 3V in a 7805 TO-220 pinout? Or maybe just want to learn to surface mount solder 0603 components. Check out this $3 OSH project from Black Mesa Labs. $0 ...