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NESpad

[An NES gamepad library for Arduino.][link]

>One use of this is to allow your Arduino access to the status of 8 buttons (up, down, left, right, A, B, START, SELECT) using only 3 digital pins (for STROBE/LATCH, CLOCK, DATA).

3 pins is a tall order on my Arduino Uno, but for the new Due it’s a drop in the bucket. It supposedly works with the [Freedom Stick][freedom], too. Wireless Arduino NES Remote here I come.

[link]: http://code.google.com/p/nespad/ “nespad – NESpad Nintendo game pad library for Arduino – Google Project Hosting”
[freedom]: http://en.wikipedia.org/wiki/Freedom_Stick “Freedom Stick by Camerica”