The working panel installed inside the frame
Another picture of the panel installed
A short video that shows how it works.
An inner view of the frame with the black mask to adapt the size.
Another assembling step
Board mounted on panel
ICD3 connected to ICSP port
A sequence that shows how the different layers are put on top each other, starting from light diffusion sheets and then different letters masks to achieve enough contrast
A commercial 25x25cm frame with enough depth to contain everything
Letters mask mirrored to enhance the black. Doubled and mirrored on transparent paper. The ink side is to the inner to be protected from scratch.
The final mask with a different characters font (high resolution)