Spent ages trying to work this design out, 2 days latter it was done, bits fit nicely although tight squeeze but it fits, extra height incase an arduino is used, i brought all the bits from Adafruit, but can i work out the building of of it. Nope, gives 2 pins on the sketch and one pic i wanted to see, there's tape in the way, so if any one builds this could they please post something on comments, people say its easy, i do lots of arduino stuff without a problem, just cant seem to follow the tutorials on this. the hole on the side is for optional added 5v input. the led holes are for 3mm leds. but here's a box for it anyway this thing is from.... https://blog.adafruit.com/2012/07/02/great-scott-delorean-inspired-time-circuit-clock-with-adafruit-gear/