GMR Switch smart chessboard with Arduino Mega 2560 and PCM speech synthesis. Reads an 8 x 8 array of AD024 GMR magnetic switches. Displays the move times and moves in algebraic notation and speaks the move in descriptive notation using PCM audio. A0-A7 (Port F) is sensor select (ranks/rows) connected to VDDs; A8-A15 (Port K) reads sensor outputs (files/columns). SDA and SCL connect to a 20 x 4 LCD Module. P10 (OC2A) is PCM audio.
Details on the sensors used: https://www.nve.com/webstore/AD024-10E
Details on the breakout boards: https://www.nve.com/webstore/AG035-06