Charlieplex displays use a unique wiring structure so many LEDs can be controlled with just a few shared wires. There are even specialized driver chips like the IS31FL3731 which can control a large number of Charlieplexed LEDs using pulse-width modulation to dim and brighten them at different intensity levels. Adafruit’s Charlieplex FeatherWing and breakout use this driver chip to make a large matrix of tiny LEDs that are super easy to control. Using a MicroPython IS31FL3731 module you can even control Charlieplex matrices from MicroPython code! This guide explores how to use the Charlieplex FeatherWing and breakout with MicroPython.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.