Tetromino Tiling Puzzle of Dot Matrix Display

A tetromino tiling puzzle that can show all ASCII characters.

• Fill the 8x8 board with 16 tetrominoes.
• Each tetromino has 1 ~ 3 ON-pixels on a single side. (the all pixels on the other side are OFF)
• Surprisingly, it can show all 95 ASCII characters by arranging the pieces.

You can print this puzzle with common consumer 3D printers.

To give a different color to the pixels, the piece should be printed out with three layers. Please use "Pause at Height" function of your slicer software.

• Piece : Change the materials twice, at h = 1.0mm and 3.0mm
• Board : Change the materials once, at h = 0.8mm

• Typeface is specified as shown above. the other typefaces are not always possible.
• I confirmed that there is at least one solution for each character using solver program.
• PDFs of goals and solutions are supplied.