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.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.