Design and realization of a tactile switches module with capacitive sensing method implemented with a microcontroller

Lorenzo Capineri

Abstract


The aim of this research project is the architecture and the design of an electronic system for controlling domestic tactile switches to be integrated into a home automation system based on the KNX standard. All the steps that led to the fulfillment of the finished prototype are reported, from the study and design of the capacitive tactile sensors and the electronic control board according to the specifications imposed by KNX standard. The touch event detection is reached as a trade-off with the footprint requirements of the switch. Experimental results of the fabricated prototype are presented to demonstrate the feasibility of this device.

Keywords


industrial electronics; capacitive switch; home automation; KNX standard

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References


A. Ozadowicz, ''Communication Reliability in the Intelligent Building Systems,'' white paper, http://www.knx.org/fileadmin/downloads

Atmel – AT42QT1070 Seven channel QTouch Touch Sensor IC Datasheet. http://www.atmel.com

M. Lee, ''The art of capacitive touch sensing'' by Cypress , http://www.cypress.com/file/72881/download

S. Kim, W. Choi, W. Rim, Y. Chun ''A Highly Sensitive Capacitive Touch Sensor Integrated on a Thin-Film-Encapsulated Active-Matrix OLED for Ultrathin Displays,'' IEEE Transactions on Electron Devices, Vol. 58 , pp. 3609 - 3615, Aug. 2011

Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment Text with EEA relevance

Directive 2004/108/EC of the European Parliament and of the Council relating to electromagnetic compatibility.

CEI EN 50491-5-2 standard.

CEI EN 61000-6-3 standard.




DOI: http://dx.doi.org/10.22149/teee.v1i3.21

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