Stop a bullet cold,
Make the Axis fold,
Change their minds,
and change the world.

Wonder Woman, Wonder Woman.
Now the world is ready for you,
and the wonders you can do.

Build your own motion and sound-reactive bracers to block every blow that comes your way.  Neopixels shine and sparkle through side-glow acrylic.  The deliciously easy-to-use sensors aboard the Circuit Playground create the magic of interactivity.    


2 x Circuit Playground
Development Board
1 x Neopixel
Pack of 5 Individual Pixels
2 x JST Extension Cable with Switch
On/Off switch and battery cable
3 x 26 awg Silicone Stranded Wire
Get 3-4 different colors

Other Materials

There are a thousand and one ways to build a bracer, so go nuts with your own build idea -- the only thing that's non-negotiable for this design is the acrylic.

  • Approx. 2mm thick acrylic (I found mine in the $1 bin at Tap Plastics)
  • Black Gaffer's tape or Duct tape
  • EVA craft foam (from the craft store)
  • Black Worbla
  • Aluminum foil tape
  • Gold acrylic paint
  • Snaps
  • Spray Plasti-dip
  • Acrylic glue


I kept the build simple and didn't use anything fancy like 3d printers or laser cutters or vacuum chambers, though all those tools would have contributed their own charm to this project.

  • Heat gun
  • Rotary cutting & polishing tool
  • Soldering iron & accessories
  • Oven & baking sheet
  • Aluminum foil
  • Sharp Scissors

This guide was first published on May 19, 2017. It was last updated on May 19, 2017.

This page (Introduction) was last updated on Apr 12, 2017.

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