Properly grounding the Touch Board increases the range of interaction. It you have the board powered via a USB cable make sure that either your computer or laptop is connected to ground, or if you are using a USB power supply it is coupled to ground. Most good quality USB power supplies do this and certain laptops can even be disconnect from the wall yet still provide adequate grounding. Remember that capacitance sensing relies on a ground reference and providing a solid connection ensure for the most reliable performance.
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