A project has transformed the Raspberry Pi, some LEGO, an Arduino and a few other components into a working microscope. Presented by IBM Research, the project can deliver results that are accurate enough for reports, papers and presentations.
https://www.notebookcheck.net/Raspberry-Pi-Utilise-the-single-board-computer-as-a-microscope-with-LEGO-and-an-Arduino.478996.0.html