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Capacitive Sensing Made Easy, Part 1

Last Updated: 05/15/2012

Capacitive sensing finds use in all kinds of industrial, automotive, medical, and consumer applications. The popularity of this technology, especially in human interface devices (HID), has grown rapidly due to its ability to reduce manufacturing cost, increase product lifespan by eliminating mechanical components, and enhance product look-and-feel. Track-pads and touch-screens constitute the major applications, but we are also seeing a growing use of this technology in implementing touch-buttons and sliders. Be it mobile phones, TV controls, automotive dashboards, remote controls, or industrial controls, capacitive sensing-based touch buttons and sliders are proving to be much more appealing than mechanical switches and rotary encoders, both in terms of looks and reliability. Not only do these sensors allow a striking user interface but also offer a highly durable and reliable solution, provided they are properly designed and calibrated. Herein lies the concern of the engineers and designers trying to implement solutions based on this technology. 

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Spec No: None; Sunset Owner: OBS; Secondary Owner: DSP; Sunset Date: 11/15/12