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chess board

y name is Michael Guerero and I’m a recent
graduate from Cal Poly Pomona, with a
bachelor’s degree in mechanical engineering.
I just recently started building my own projects
to build up my portfolio and gain experience
in prototyping.
In this project, I set out to replicate the Wizard’s chess game from
the Harry Potter series, because I liked the idea of using technology
to emulate magic in the real world.
The box was made from quarter-inch MDF, with steel rods for the
linear bearing blocks to slide across. I added various scrap pieces
of wood to make supports, to hold the stepper motors and limit
switches in the proper locations. A pair of timing belts are used to
move the electromagnet along both axes. Each chess piece has a
loose steel ball inside, which gives the magnet a way of attracting
the plastic pieces.
The code starts by zeroing both stepper motors and returning the
electromagnet to position A1 on the board. The serial monitor will
prompt the first player to enter the square address of the piece to be
moved, and the location for the piece to be moved to. The magnet
moves to the first square, turns on the magnet, and then moves
to the next specified square. When the piece is being moved, the
magnet will initially offset to the corner and then move along the
lines between squares, which allows pieces to be moved around
each other without colliding (for example, this allows the knight to be
moved without having to first move the pawns in front of it).


Active pieces move
along the edges of
the squares, so as
not to disturb the rest
of the board

By Michael Guerero hsmag.cc/SuXYyT
Free download pdf