Screenshot of the running (app). This is the control side of the system (the computer). The arduino is loaded and running the scanning.

SparkFun Inventors Kit for Arduino Old Stock – SparkFun Electronics.

This kit is replaced, but the parts list (the bottom of page) is active. If you are intense in your DIY scanner, this is a good place to learn arduino coding and building. There is enough to begin working out the design and detailed coding of your first prototype digital scanner.