Arduino infra-red (IR) remote control
[UPDATE 2009-01-17] This article is still valid, but I recommend checking out Arduino IR remote control – more advanced, which has a detailed explanation of the wiring and a zip file with some updated...
View ArticleArduino playground – 9VBatteryAdapter
RTFA: http://www.arduino.cc/playground/Learning/9VBatter… With just two parts your Arduino goes portable, powered by a 9V battery. Note that these connections are the same ones you’d use to make a plug...
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