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→Tutorials
* [http://www.doctormonk.com/2012/08/led-clock-using-raspberry-pi.html LED Clock]: details of the LED 7-segment module clock that Drew demo'd
* [http://www.doctormonk.com/2012/08/led-clock-using-raspberry-pi.html LED Clock]: details of the LED 7-segment module clock that Drew demo'd
** [http://learn.adafruit.com/matrix-7-segment-led-backpack-with-the-raspberry-pi/ Adafruit has now made their own tutorial]
** [http://learn.adafruit.com/matrix-7-segment-led-backpack-with-the-raspberry-pi/ Adafruit has now made their own tutorial]
== Technical Reference ==
* [http://elinux.org/RPi_Tutorial_EGHS:GPIO_Protection_Circuits GPIO protection circuits]: different approaches to safely interfacing with RPi pins
* [http://elinux.org/RPi_Tutorial_EGHS:GPIO_Protection_Circuits GPIO protection circuits]: different approaches to safely interfacing with RPi pins
* [http://www.sparkfun.com/tutorials/65 SparkFun sensor interfacing]: general tutorial for logic level conversion
* [http://www.sparkfun.com/tutorials/65 SparkFun sensor interfacing]: general tutorial for logic level conversion