Macro LED for MP-E 65

Stuff needed:
1x Adafruit 16 neopixel ring (http://www.adafruit.com/products/1463)
1x Adafruit 24 neopixel ring (http://www.adafruit.com/products/1586)
1x Adafruit trinket 5V (http://www.adafruit.com/product/1501)
1x Adafruit powerswitch (http://www.adafruit.com/product/1400)
3x 40cm of small wire (1.5mm diameter max)
30cm of heat shrink
8x M3 nuts
2x M3 x 6 hex screws
4x M3 x 10 hex screws
1 print of each pieces

Tools:
Soldering iron
Hex driver
Knife or "wire tools"
Superglue

1: Install software for the trinket
Follow these steps of the (great) adafruit's tutorial:

2: Test the electronic (skip if you know what you're doing)

First cut 10cm of each of the 3 wires. The 30cm ones will go between the box and the big ring. The 10cm bettween each rings.
The wiring will look a bit like that: https://learn.adafruit.com/system/assets/assets/000/013/804/large1024/3d_printing_cam-light-rig-Curcuit-Layout.jpg?1390776265
Be carefull to make your soldering very compact behind the rings. There won't be a lot of place.
Solder the 30cm black wire to the GND of the trinket dans the GND of the big ring. Do the same with the red wire between 5V from trinket to PWR on the led ring. Last wire go from pin #0 to the IN of the ring.
Now connect the small ring to the big with 10cm wire:
second GND to GND of the small ring
same with PWR
OUT of th big go to IN of the small ring
Start Arduino IDE, copy paste this sketch:
https://learn.adafruit.com/3d-printed-camera-led-ring/circuit-diagram
change line:
#define N_PIXELS 24 // Number of pixels you are using
for
#define N_PIXELS 40 // Number of pixels you are using

(40 is for 24 led on the big ring + 16 on the small)

Connect the trinket to your PC (no need of batteries, we^re using the PC to power the LED for now), bootloader mode should be active (red light flashing) to download the sketch, if not press the button on the trinket.
Download the sktech, all LEDs should be on and white !
Now that everyting works, unplug the USB, unsolder the wire on the trinket and the 10cm wire on the big ring side.

3: LED Head

Check how the rings fit on the front piece. It should be tight.
You'll need to drill 8 holes throught the front piece. The holes must be by pair on each ring at the same place than the six extrusion on the clamp piece. We're using them to hide the cables. They'll make a "U" under the front piece and than sandwitched by gluing the clamp piece. Positions your rings to minimize wire length.
When done, install the small ring with the cables going behind the head piece. If ok, glue it (3-4 points on the outer side are ok).
Put each wire to the outer ring hole, forming a U.
Cut the wires about 20-25mm and solder them to the outer ring.
Solder the box-to-outer-ring's wires and put the other end trought the hole between the screws.
Glue the outer ring in place. Be carefull to arrange the wires so they don't cross each others.

To be continued...