Alan numitron clock
SNES Pi Webserver
USB Volume/USB toys
SNES Arcade cabinet
Game boy projects
Home Presence Detector
Rand Nerd Tut
Carnet du maker (fr)
ATmel blog (defunct)
Arduino and a button
Various notes about buttons, switches, etc...
This is one of the multiple possible circuit. This one is pulled-down, can read without ambiguity maybe until 5 buttons, but can't read multiple press at the same time.
Receipe for n buttons:
The "Rbottom" (on the graph) one is a pull down.
For n == 3:
One can find an interresting variant here : http://rayshobby.net/blog/?p=16
EEVblog Dave crazy bloke's version http://www.youtube.com/watch?v=Foc9R0dC2iI
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