It is not everyday that you run into people designing their own power supplies — check out this great project from the Adafruit Forums by community member “Physics_Dude”:

Alright, I recently had the need to build a rectified AC/DC power supply. Yes, I mean rectified, not regulated. It won’t be used to power sensitive projects.

I used Adafruit’s current and volt meters to read out said values.

Read more.

Featured Adafruit Products

Panel Current Meter – 0 to 9.99A: Put a current meter anywhere with this very handy display. This panel meter requires a DC voltage to run, and then has two thick gauge wires to measure current draw. A shunt is already on board so its very easy to hook up! (read more)

Panel Volt Meter – 4.5V to 30VDC: Put a voltage meter anywhere with this very handy display. This panel meter simply connects to whatever DC supply you are trying to track, easy to wire up! (read me)