文件名称:Atmel_QTouch_Library_2.0
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- 上传时间:2012-11-16
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文件大小:7.29mb
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The QTouch™ devices are charging a sense electrode of unknown capacitance to a known potential. The electrode is typically a copper area on a printed circuit board. The resulting charge is transferred into a measurement circuit. By measuring the charge after one or more charge-and-transfer cycles, the capacitance of the sense plate can be determined. Placing a finger on the touch surface introduces external capacitance that affects the flow of charge at that point. This registers as a touch. QTouch™ microcontrollers can also be set up to detect the proximity of a finger, rather than absolute touch. -The QTouch™ devices are charging a sense electrode of unknown capacitance to a known potential. The electrode is typically a copper area on a printed circuit board. The resulting charge is transferred into a measurement circuit. By measuring the charge after one or more charge-and-transfer cycles, the capacitance of the sense plate can be determined. Placing a finger on the touch surface introduces external capacitance that affects the flow of charge at that point. This registers as a touch. QTouch™ microcontrollers can also be set up to detect the proximity of a finger, rather than absolute touch.
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Atmel_QTouch_Library_2.0.exe
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