A closer look at the funky power regulator board. Vin and GND from the power source (7-12V - ideal for 9V batteries) goes in the top - 5V regulated and GND comes out the bottom. The capacitors are across the input and output lines to smooth out fluctuations.
The idea behind this board was to make a modular power system separate from the microcontroller board. This would mean different voltage supplies could be used for different projects (although variable voltage supplies could be an option... However I had a bunch of L7805CV ICs, so this is wot i made)