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Here you can see a better view of the circuitry for the extra line sensors. I also added a couple of slide switches. You can see one of them just above and to the right of the brown circuit board. One of the switches toggles between Mini-Sumo and Line-Following modes, and one of them provides an initial Left/Right hint for the initial direction to turn in Mini-Sumo. I've never actually used this feature, but it's there. Smaller...
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Copyright 2010 by Dave Hylands