The tape is a lot wider than the strip, and has a peel-away backing. Cut a piece that’s half as long as the strip, align one edge while pressing the tape to the strip, then trim away the extra with an X-Acto knife. The trimmed section can then be similarly applied to the second half of the strip and the remaining extra width trimmed and discarded.
To apply this to the frame: peel away a few inches of the tape backing from the center of the strip, leaving the “tails” hanging off to one side. Center the strip on the frame and press into place. Then work from the center outward a few inches at a time, pulling at the tails and pressing the strip into place.
If you go this route, lie the LED strip face down, run a bead or a series of dots along the back of the strip, then place the frame on top of this and set some weight on it for a few hours (a couple heavy books should suffice). Do not use anything like A-clamps…these squeeze very tightly and could damage the NeoPixel strip!
Self-stick hook-and-loop (Velcro) fasteners were used so the pack can be removed for easier battery access.
For a slimmer profile, our tactile on/off switch can be soldered between the + terminals on the battery pack and UBEC.
Load up the SD card with an image (as explained in the “Preparing Images” section), set the dial to a middle position, power it up and see if it works. You should see the red “SD” led flicker for a few seconds while the software initializes, then tapping the button should produce a light show on the NeoPixel strip.