The finished LED Wristband in the dark. Its form factor is not nearly as small as it could be, but due to it being my first approach I still have a lot of debug circuitry on top. The comparably huge LiPo battery doesn’t improve on that.
How I built it (Stages of development)
Stage 1 - Early development of the wristband (me poking LED’s through a ribbon)
Stage 2 - All LED’s are set, the wires have been soldered to them and organized accordingly. One side of the ribbon is already sewn together.
Stage 3 - Both sides have been sewn, however there is still a lot of wiring to the controller to do.
Stage 4 - Picture shows all the intricate wiring necessary for CharliePlexing 12 LED’s with only 4 I/O Pins. Hot glue holds it all together, I would be lost without it.
Stage 5 - The only thing missing is the LiPo battery