This is a gread project made by John Loeffer
and psoted for the hackaday prize. This is a cool breadbaord power supply with different voltage values and more cool stuff. John: "Open Power is about providing Makers, Students, and Hobbyist with a Portable, Versatile Intuitive and Cheap power supply for all their projects".
Simple and Cheap Constant Voltage/ Constant Current Power Supply variable from 0.6V to 12V with led voltage indication. USB Load sharing powered and Lipo backup. (cost under $3.25)
A Constant Voltage Constant Current Power Supply 0.6V to 12V In addition to an adjustable Negative Rail. Voltage and current Monitoring Provided by a OLED Display. (cost estimate under $6.50).