Filterwheel motorization

Motorisation of a basic 1.25" filterwheel, using cheap 28BYJ48 stepper motor and hall sensor for precise positionment.
Designed to be printed in PLA. There is a gear for reduction to the already reduced stepper, so it is really precise. Using a stepper allows to not use any current when the wheel is at its target position.
The whole thing is driven by an arduino Nano, connected to the filterwheel using a RJ45 cable.
This requires drilling two 3mm holes for fixation, and gluing a big wheel around the filters. Make sure you have the exact same filterwheel... Otherwise, the openscad file is provided so you can adjust it.
There is a ball in the filterwheel to make it hold its position. This ball must be removed.


Appart from the printed parts, the BOM is :
- 28BYJ48 stepper motor with its controller (~3€)
- One US5881LUA hall sensor with a magnet - 2€ at [MC Hobby](https://shop.mchobby.be/proximite/86-senseur-effet-hall-us5881lua-extra-3232100000865.html)
- An Arduino Nano