MRI stands for Magnetic Resonance Imaging. So, the SpokePOV uses a Magnet to measure wheel rotation, and derives the Resonant frame rate by timing Magnet readings, and then it makes the Image appear, as if by some kind of circular magic, on the bicycle wheel! Thank you Adafruit, for this super cool toy! I use it to make legit brain-scan on a bike! I made two images of brains and fine-tuned in the SpokePOV software.
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.