I'm using an older scanner as a box to create a UV PCB exposure box. I'll go through all steps of the hardware and software design emphasizing more to software logic. You will find all the resources on Github, including all of the design files.

• Links:

Blog: https://lytrax.io/blog/projects/diy-u...
Github: https://github.com/clytras/CL_UVScanner

• Library Dependencies:

Tim Eckel Arduino toneAC: https://bitbucket.org/teckel12/arduin...
CL_RotaryEncoder: https://github.com/clytras/CL_RotaryE...
CL_Button: https://github.com/clytras/CL_Button
TM1637Display: https://github.com/clytras/TM1637Display

• Music notice (NC):

Mellow Acid by CyberSDF   / cybersdf  
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
https://creativecommons.org/licenses/...
Music promoted by Audio Library    • Mellow Acid – CyberSDF (No Copyright ...