December 18, 2016 · programming arduino led goggles neopixel ooh shiny maker

Make your own custom NeoPixel goggles

A few months ago I made some custom LED goggles to light myself up at Burning Man 2016! Since then I found they also fit in well at concerts and festivals I attend. Since I keep getting questions about how to make them, I decided to throw together a post with some links and tips!

[Shiny!](/content/images/2016/12/example.gif)

Build overview Time investment: 3-8 hours Skills required: soldering, programming Cost: ~$40-60

The time investment is really dependent on your proficiency at the required skills and your tendency to be perfectionist with the wiring. :) Most of the parts I used are available in a single kit from Adafruit! The main modifications I made on top of this kit are:

  • Added a 3 x AAA Battery Holder to the strap for extended battery life and easy on/off

  • Added two push buttons which wire into PINs on the Trinket to control effects/settings

To make your own, you should start by following(the tutorial on Adafruit. It’s very detailed and gets us most of the way there! You’ll also need to complete the Introducing Trinket and All About Arduino Libraries tutorials. It’s mostly just installing pre-requisites to program the Trinket and use the NeoPixel library. My custom code for my goggles is available on my GitHub. It’s not perfect (I suspect there are a few things I can do to save more bytes and add more effects) but it’s good enough for now! Some effects are borrowed from NeoPixel demos/examples and other open-source implementations, but a few are my own creation!

Some tips and recommendations:

  • Decide where the wires will go first. Solder only what’s needed for each stage. Only cut wires to the proper length when there’s no other way forward. Measure twice.

  • Line up the LED rings so they start at the same place on each eye. This simplifies some animation math and code.

  • Remove the tinted lenses. They make it far too difficult to see in dimly lighted environments.

  • Just accept that there’s going to be light bleed. (I probably spent 4 or 5 hours trying to engineer several solutions, but failed.)

  • Along that vein of thought, like Adafruit continually warns, this is probably not good for your eyes.

  • The googles are a little uncomfortable resting on your nose for extended periods. Add some soft padding.

  • If you want to add diffraction lenses, GloFX sells the same goggles, but you can customize the lenses. These goggles also usually come with a rubber padding around the rim, which solves the above padding issue, too!

  • Especially if you’re sharing your goggles, the battery pack wire experiences a lot of stress. If you don’t unplug the battery pack, it might be a good idea to directly solder the + and - wires directly to the Trinket to avoid it getting unplugged often. Reinforce your solder joints with hot glue. Reinforce the wiring at the base of the battery pack with hot glue. Reinforce the battery wires at a few points in-between with hot glue.

  • I usually fix the battery pack to the goggle strap with some electrical tape.

That should be plenty of info for you to get started! Email me if you have any questions!