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→GPIO
== GPIO ==
*What are the pins?
*Raspberry Leaf
**http://www.doctormonk.com/2013/02/raspberry-pi-and-breadboard-raspberry.html
*pin over-voltage protection circuits - http://elinux.org/RPi_Tutorial_EGHS:GPIO_Protection_Circuits
*light example - https://projects.drogon.net/raspberry-pi/gpio-examples/tux-crossing/gpio-examples-1-a-single-led/