And there’s usually a linear sensor, often RGB and complete with driver circuitry, in a scanner if you take one apart. This could be done for just a few bucks if you were thrifty. The rest of ...

The disk is moved along the Y-axis to fill in the scan. On the disk assembly, there is a potentometer to measure the y-axis position of the beam, and an optical sensor to trigger an oscilloscope ...

TL;DR: Score almost half off this color-matching scanner, perfect for DIY projects and home makeovers ... Nix Mini 2 ...