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Step 12: The Interface Board

Picture of The Interface Board

The interface board contains all of the dropper resistors and connectors for the ribbon cable and the interconnection loom.

The board is made from a piece of stripboard 86mm x 46mm.

Cut the strips at the eight locations shown in the diagram. These electrically separate the two rows of eight pins of the 16 way PCB header. I used a scalpel to carefully cut the copper strips as these were between adjacent holes in the board.

Construct the interface board using the values of resistors determined in the sensor tests (12x100K and 2x470K).

Populate the board with the jumpers, 16 way PCB header and header pins.

Note that the resistors and connection pins are numbered in the diagram to match the wash programme numbers.