The good news is, that modern DLP projectors are sold for a low price. Each of the projectors is equipped with a so called digital micromirror device, which is an MEMS array. It contains millions of pixels, and each of them is realized with two actuators. The actuators are moving physically back and forth and this brings the mirror into the target position which reflects the light.
A movable mirror is the perfect candidate for building a nanorobot, because it was produced already at a low price and doesn't need much energy. Putting two of the actuators together would result into a DIY BEAM robot which can walk forward.
A normal optical microscope can make the servo motor array visible. The problem is, that a manual driven tweezers is too big for handling the tiny motors. What is the appropriate procedure to extract a single micromirror and utilize the MEMS motor in a robot?