The project uses a raspberry pi and a block erupter ASIC bitcoin mining USB device. It is meant for solo mining(lottery style) and will light up and notify you if you discovered a block. The display shows a colour representation of the block and then does an animation like a lottery machine when the block changes notifying you whether you won or lost.
The 5V goes in through the barrel jack adapter to the neoPixels. The Neopixels have a connector on the other end with the same 5V line + a data line. The neopixel connector is connected to the Pi(5V + GND) and the data line is on GPIO18. The fan isn't connected but if it was it would just be on the second 5V of the Pi. Easy.