This hat has a chasing LED function thanks to our old buddy the 555 timer. [BananaSlug] even developed in the choice to modification the speed at the push of a button.
His style starts out with a costume hat. Each of the 25 LEDs is soldered to a 2×4 hole chunk of protoboard. The LED bundle is pushed with a slit in the hat, however the protoboard stays on the inside where it can be stitched in place. From there [BananaSlug] soldered one unfavorable bus around the circumference, as well as an private positive lead from each module back to the manage board. They’re dealt with by a set of CD4017 decade counters which are clocked by the 555 timer circuit.
This is a fantastic bit analog/logic job as well as the style is best if you’ve got the coat to go together with it.