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No fairy costume is complete without a glowing pixie dust bag. This one uses a touch sensor to cycle through colors on the beautifully twinkling NeoPixel rings, all powered by a tiny GEMMA microcontroller. This sophisticated-looking, rechargeable prop is easy to build with just a little bit of soldering.

 You'll need:

  • GEMMA mini Arduino-compatible microcontroller (can also substitute Trinket)
  • RGB NeoPixel LEDs - two Flora pixels, one 12 x ring, and one 16 x ring
  • Small translucent fabric pouch
  • Scale model scenic snow in small plastic bag to diffuse pixels (or tissue paper, styrofoam beads, or another diffuser)
  • 500mAh rechargeable lipoly battery and charger
  • Tactile on/off switch
  • Momentary capacative touch sensor
  • 10k Ω resistor
  • Heat shrink tubing or electrical tape
  • Soldering iron and solder
  • Solid core or stranded wire (20 to 26 gauge)
  • Helping third hand tool
  • Wire strippers
  • Flush diagonal cutters
  • Solderless breadboard, hookup wire, and alligator clips for prototyping
  • Double-sided foam tape
  • Needle and thread
Last updated on 2015-05-04 at 04.23.15 PM Published on 2014-10-22 at 12.20.19 PM