The circuit we'll make is pretty simple. Each NeoPixel ring will have three connections to the Gemma M0:
- GND to GND
- V+ to VOUT
- Digital In to D1 or D0 respectively for the left and right ring
The LiPo battery will provide power to the Gemma M0 and the NeoPixels.
Start by cutting a 6" lengths each of red, black, and yellow wire. Then, cut a 4" length each of red, black, and green wire. Strip a 1/4" of insulation from both ends of each wire.
Now, solder the 6" wires to the left NeoPixel ring, following the guide and circuit diagram from above.
Then, solder the 4" wires to the right NeoPixel ring.
Drill three holes in each goggle "lens" if you're using molded plastic prop goggles. These need to align with the wire placement of each NeoPixel ring.
Or, if you're using goggles with removable lenses, remove/unscrew them now -- the wires will simple drop inside the goggle "cups".
Place each NeoPixel ring over the goggle lenses, and pass the wires through to the inside. This is where the Gemma M0 and battery will live.
Flip over the goggles, and then solder the wires on as shown in the diagram.
NOTE: the photos show the NeoPixels being powered by the 3.3V pad on the Gemma M0, which works, but soldering to the VOUT is preferable.
Plug in the battery, and then affix the Gemma M0, NeoPixel rings, and battery to the goggles with double stick foam tape, making sure to leave the on/off switch exposed and the USB port accessible.
Next, you'll plug the Gemma M0 into your computer with a USB cable and begin programming it!