DIY Low Cost DRO // Arduino & Rotary Encoders

A low cost Arduino based DRO for a Weinig Profimat 23 Profile Moulder which could also be adapted to work with other machinery, it has it's limitations but if you keep within them its very accurate and reliable, currently has been in operation for 12+ months.

I'm new to working with arduino or writing code in general so if you see any improvements that could be made, I'm all ears, I'll update the code to include any improvements I come by.
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Arduino Sketch available here
http://mechmotion.com/arduino-quadrat...
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Tons of credit to @HomoFaciens for the base encoder counting sketch, there is a wealth of information on his youtube channel and website involving arduino and rotary encoders.
https://homofaciens.de/technics-base-...
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A list of key parts used - best to order from ebay, aliexpress or banggood, search around for the best prices.

Arduino Uno or Nano
https://www.banggood.com/search/94093...

Optical Interrupter (Commonly called an Arduino Speed Sensor)
https://www.aliexpress.com/item/32319...

Arduino 1602 LCD
https://www.aliexpress.com/item/32709...

For the encoder wheel it was 3d printed, I also had success with a laser cut acrylic encoder wheel, both were partially transparent so I'd just sprayed them with black paint. Thingiverse.com have a few customizable encoder wheel designs if you have access to a 3d printer.