ChessLR progress report 7 shows the first draft of my MCP23017 board. This board is used to connect the chess board LED and Reed switches to the 8 MCP23017 chips. Each chip handles a row on the chess board, which is 8 LEDs and 8 Reed switches. This means that the MCP board handles 128 I/O pins, which can all be read from the 2 i2c pins. Pretty sick.
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