A friend requested if it was possible to scroll text across three 8x8 LED matrices, specifically this type from Adafruit, which are very bright.
So, I got to work.
Continue reading Scrolling text with a Raspberry Pi and LED Matrix
A friend requested if it was possible to scroll text across three 8x8 LED matrices, specifically this type from Adafruit, which are very bright.
So, I got to work.
Continue reading Scrolling text with a Raspberry Pi and LED Matrix
Below is some information on how to get an 8x8 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.
http://learn.adafruit.com/adafruit-led-backpack/
http://learn.adafruit.com/matrix-7-segment-led-backpack-with-the-raspberry-pi/configuring-your-pi-for-i2c
In brief;
Adafruit have some great instructions in the links above on how to do this.
When using i2cdetect to scan my bus, 0x70 was returned for the address of my matrix.
I am using a Rev B board and my bus is 1. If you get nothing back, check bus 0 with i2cdetect -y 0.
Continue reading Raspberry Pi and an 8×8 LED Matrix, using C.