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In recent years, it has become difficult indeed to imagine a world without touch-sensitive electronics. Smartphones are a prominent and ubiquitous example, but of course, there are numerous devices and systems that incorporate touch-sensitive functionality. This amazing technology is not as complicated as you may think. The fundamental principles of both, resistance and capacitance can be employed as a means to achieving touch sensitivity. Here, we will discuss only capacitive touch sensing, which has emerged as the preferred implementation.

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