Macro-scale digital mirror device

INSTRUCTABLE: https://www.instructables.com/Digital...
Applied Science DLP demo:    • How Digital Light Processing (DLP) works  
Daniel Rozin:    • How This Guy Makes Amazing Mechanical Mirr...  

0:00 Introduction
0:58 DMD to scale
1:40 Initial testing
2:22 System construction
3:40 Flipping mirrors

My last project focused on building a large-scale version of a CD player. With the same spirit, I decided to build a scaled up version of a Digital Micromirror Device (DMD). The inspiration for this project came from Ben Krasnow's Applied Science channel: How DLPs Work. In this video, Ben provides a great explanation for how Digital Light Projectors work and builds a demonstrator. He mentions the possibility of building a mirror array with solenoids to flip each mirror individually. That idea was always interesting to me, and so I finally decided to try it out.

DMDs usually consist of several hundred thousand mirrors! The device I built has only 25 mirrors... Each mirror can flip between two states using a push-pull solenoid. The pattern on the array is controlled by an Arduino.

This project is also related to the artwork of Daniel Rozin. He builds "mechanical mirrors" out of objects arranged in a 2D array that flip to form an image. Often the array displays an image of the observer in front of it, similar to a mirror.