http://i215.photobucket.com/albums/cc210/acheekymonkeyuk/Airsoft/miner_zpse8a0d143.jpg

Just ordered a few more to fill out the hub (antminers)

Its basically a USB Fan fully sealed at the front so all the air goes down a 2 ltr coke bottle with the top and bottom sealed off

Basically made a homemade ghetto wind tunnel