Led matrix graphical user interface on the RaspberryPi from Frédérick Blais:
Yesterday, I plugged into my Raspberry Pi a little i2c LED Matrix. I wrote Python class to interact with it but I thought it would be really interesting to toggle the matrix’s LED with a graphical user interface on the Pi itself. This is exactly what I done and you can take a look at the result in the following Youtube video.
To connections between the matrix and the Pi are really simple, you just need to connect 4 signals directly together : GND, 3V3, DATA and CLK. There is no need for pull-up resistor on the i2c clock and data lines, I presume the Pi already have them. The display is designed for 5V but it works really well at 3.3V.
Check out Frédérick’s blog for source code and more!
Featured Adafruit Products
Adafruit Mini 8×8 LED Matrix w/I2C Backpack – Red – 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. (read more)
Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new “Adafruit Raspberry Pi Educational Linux Distro”? It’s our tweaked distribution for teaching electronics using the Raspberry Pi. But wait, there’s more! Try our new Raspberry Pi WebIDE! The easiest way to learn programming on a Raspberry Pi.
We now have Raspberry Pi Model B with 512MB RAM in stock and shipping now!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Adafruit interviews Dan Rasure, Managing Partner TechShop 2.0
Wearables — Simulate tattoos
Electronics — Heatsinks aren’t enough!
Biohacking — Getting More from Home DNA Testing
Sorry, the comment form is closed at this time.