No more messing around with power supply parts. This is a complete 1.2A adjustable switching power supply on a chip, with 2 preset voltages. Up to 95% efficient switching voltage regulator, capacitors and all, on an oldschool DIP-8 chip size board. Select 3.3v or 5v built in, or add a single resistor for 0.8v-26v. The entire bottom of the 'chip' is an unbroken ground plane, helping to protect your design from power supply switching noise. This is an open source design. Just got boards in the mail!