In today's industrial environments, manufacturing plants are using touch screen panels to operate robotic work cells. By touching graphic buttons on a flat panel display, an operator can easily control the movement of a robot. The interaction between the operator's hand and touch screen creates a tiny capacitor. The microcontroller reads the capacitance value and allows the programmable chip to control a robot or industrial machine. Another sensing technology used in touch screens is resistive touch. Resistive touch technology is based on two flexible resistive sheets separated by air. Touching the screen allows a voltage drop to be produced by the flexible resistive sheets. The voltage value is mapped to the screen's touch location. Today, some microcontrollers include capacitive touch sensing technologies within their silicon substrate. Although the Arduino doesn't have a capacitive sense feature embedded within its silicon substrate, it can easily be...