SensingChessboard
To create a chess-board that can sense the position of the various chess-pieces.
Probably based on some form of induction-influencing phenomena such as magnets of different strengts or tuned circuits.
Idea: a properly tuned LC-circuit will, once the capacitor is charged, resonate at a precise frequentie determined by inductance and capacity. The LC-circuit is mounted in each chess-piece, with a different resonance frequency for each type of piece/color. A coil under the playfield will charge the capacitor in the LC-circuit by applying a magnetic field for a certain time. Once the magnetic field is removed, the charged capacitor will discharge, generating a magnetic field in the coil. This magnetic field can be sensed by the coil under the playfield. When the magnetic field collapses, part of the energy goes back into the capacitor, which will then discharge again, etc..