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Step 10: Test and Simulation Board

Picture of Test and Simulation Board

A small test and simulation board was constructed as shown in the diagram.

This has two functions:

1. When connected to the sensor via the ribbon cable, the resistance of each LDR can be measured with the related wash programme LED on and off.

2. When connected to the Chatterbox via the ribbon cable, the playing of each audio clip can be triggered by grounding the relevant test pin.

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.

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

Note that the test pins are numbered with the Wash Programme numbers.