January 18, 2013 AT 3:00 am

Raspberry Pi and an 8×8 LED Matrix, using C. #piday #raspberrypi @Raspberry_Pi

We spy with our little eyes, our 1.2″ 8×8 matrix in blue!

From Marks-space.com:

Below is some information on how to get an 8×8 led matrix working on your Raspberry Pi using C.
I have also included the code needed to get text scrolling.

The matrix I am using is this one from Adafruit. This matrix uses a HT16K33 controller chip and communicates with the Pi via the i2c bus.

Adafruit has very good and detailed tutorials on how to solder it up and get i2c working between your Pi and the Matrix.

In brief:

  • Scan the i2c bus for your device.
  • Download the code needed.
  • Compile.
  • Run.

Read more.

Featured Adafruit Product!

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Adafruit Small 1.2″ 8×8 LED Matrix w/I2C Backpack – Blue: What’s better than a single LED? Lots of LEDs! A fun way to make a small display is to use an 8×8 matrix or a 4-digit 7-segment display. Matrices like these are ‘multiplexed’ – so to control 64 LEDs you need 16 pins. That’s a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there’s a lot of wiring to set up and they take up a ton of space. Here at Adafruit we feel your pain! After all, wouldn’t it be awesome if you could control a matrix without tons of wiring? That’s where these lovely LED matrix backpacks come in. We have them in three flavors – a mini 0.7″ 8×8, a small 1.2″ 8×8 and a 4-digit 0.56″ 7-segment. They work perfectly with the matrices we stock in the Adafruit shop and make adding a bright little display trivial. (read more)


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