This project is a continuation of my quest to build a robotic clock that can write and rewrite the time continuously, day in and day out. My first attempt, Doodle Clock, was a failure due to the marker drying up. Doodle Clock #2 failed because the display — a kids’ magnetic drawing board — soon got scratched.
This new clock, Sequino, was inspired by my daughter’s T-shirt with the pattern-changing sequin cloth glued to it. After getting some stock sequin fabric from a vendor, I figured out the size of the clock based on the minimum resolution of the cloth: it has 5mm circular sequins stitched 3mm apart. Another limit of the clock was my 3D printer bed size of 245mm×170mm.