All of the components can be bought on ebay and are very cheap. The basis of the power supply is a prebuilt breadboard power supply. I modify the board to make it a little easier to hookup. The result is a power supply that can powered from a variety of sources (Plug pack - USB Charger - USB Power Bank etc etc)
The breadboard PSU has these Inputs
- 1* Round 12v input 5.5mm*2.1mm
- 1* USB input
- 6 Outputs configurable for 3.3v or 5v
* with a minor mod you can also tap into the 12v if you are using that input.
1. Desolder the existing output pins.
2. cut the header to length