Here he’s showing the gutted half of an original NES. Although the motherboard is missing, the connectors for the controllers are still there. They’ve been rewired to an Arduino board which has a BlueSMiRF modem. The controller commands are harvested by the Arduino and sent to whatever is listening on the other end of the Bluetooth connection. He also has plans to add a couple of SNES ports to the enclosure so that those unaltered controllers may also be used.
In the video after the break [Dustin] walks us through the hardware setup. He then demonstrates pairing the device with an Android phone and playing some emulators with the pictured controllers.