I wore this LED T-Shirt under nice white shirt to teach the class at Hawaii STEM Conference. It is an 8×10 array of individually addressable LEDs (HL1606 strip from +Adafruit Industries ) driven by PJRC Teensy 2.0 and 4 D-cell batteries, with a Pololu Step-Down Voltage Regulator D15V70F5S3 to keep it at 5vdc. Current code is the Basic Pattern sketch from example lib, with mod from AdaVision’s Processing script to deal with zig-zag wiring. The PWM lib mod works too, but there were more examples for this. Adding other effects (like a beating heart, or other animations) is simple matter of programming. Comms & sensors would be cool too… someday.
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.