5x5
thingiverse
To create a blinky necklace for an art festival, I printed 25 cubes and numerous clips to attach the LED strand. Attaching super glue to each clip ensured better hold. Wiring the LEDs separately from power, clock, and data was connected to Teensy 2.0's outputs. A JY-MCU Bluetooth serial module hooked up to hardware serial on the board completed the setup. The code, available on GitHub, allows selecting a pattern by sending characters and displays feedback via serial. For control, Blueserial app on Android was used. The materials required included printed cubes, clips, zipties, LED strand, Teensy 2.0, Bluetooth module, wire, solder, and paracord for necklace-wearing convenience.
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