You’ll need some method of securing the electronics inside the goggles. Hot-melt glue (with a glue gun) works well for this. Watch your fingers! Tape could be used for a quick and temporary setup.
Some steps require perseverance. You will need to provide your own; we do not sell patience in the shop :)
- Goggles with 50mm (2 inch) round lenses. We have some in the shop that are perfectly sized for this project. Alternately, a well-stocked costume store may have something suitable, Restoration Hardware sells these nifty German goggles, or you might brave the wilds of eBay for “steampunk goggles” or similar. Plastic is best; that way there will be no concerns there about contacting metal.
NeoPixel Ring(s): two if you want to decorate both lenses, or just one for a monocle effect. Two is awesome, but uses 2x the power!
- Battery: either a lithium-polymer battery or a 3x AA battery case (read explanation below before deciding).
Adafruit Trinket: 3.3V version is great, but 5V works well too.
- Heat-shrink tubing is recommended for insulating the wire connections.
- Optional: diffuser lenses for the goggles, to help soften the light from the LEDs. These can simply be cut from paper, or if you have access to a laser cutter you can get all fancy with white acrylic.
An assortment of goggles…the two in front are legitimate safety and welding goggles, while the two in back are costume shop and toy store finds. Yet they all use 50mm round lenses!
Second photo shows the inexpensive “costume goggles” in the Adafruit shop.
- The 150 mAh LiPo battery is tiny and easily fits within the goggles, but the power capacity is limited and run time will be shorter. To improve run times, the software can be changed to lower the overall LED brightness and reduce power usage. Or you can substitute a larger LiPo battery…but if it’s too big it won’t fit inside the goggles, you’d need to run wires and hide the battery elsewhere.
- Costs more initially, but is rechargeable.
- You’ll also need a LiPo charger and JST socket inside the goggles. For the latter, cut a LiPo battery extension cable in half. The battery gets disconnected for charging (doesn’t charge in-place).
- This saves money initially; the battery case and cells are inexpensive and you don’t need a charger.
- Provides excellent run time. You can use brighter, showier LED patterns. And you can easily swap a fresh set of batteries.
- The battery pack is much larger and heavier. It won't fit inside the goggles — you’ll need to run wires and put the battery pack in a pocket or conceal it behind (or within) a hat.