Motorized SMD Reel Loader

I needed an easy (and fun) way to refill the Reels for my Pick and Place machine with the bulk SMT parts I buy, so I come up with this Motorized SMD Reel Loader.

Features

Small footprint.
Can handle Reels with up to 7" diameter, easily expandable to handle other diameters.
Interchangeable shafts to handle 8mm, 12mm and 16mm Tape Width.
Use two push buttons to control the direction of the Reel.
Can quickle help refeel your Reel with bulk SMD components.




Parts
You will need:

1 x Arduino Nano.
1 x 28BYJ-48 5V 4 Phase DC Gear Stepper Motor+ ULN2003 Driver Board.
2 x Tactile Switch 6x6x6mm.
2 x 10K Resistor 1/4 W.
1 x 15mm x 40mm DIY Prototype PCB.
15 x 624ZZ 4mmx13mmx5mm Ball Bearing.
1 x 20x20x160 mm profile.
2 x 20x20x80 mm profile.
Phillips screws 2-28 x 3/8 BC-0206LPP.
3mm x 16mm Socket Head Screws.
4mm x 8mm Socket Head Screws.
4mm x 16mm Socket Head Screws.




Wiring Notes
The following schematic shows the wiring of the Arduino Nano and th