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A Multiplier-Free Noise Trapped Touch Algorithm for Low Cost 4x4 Matrix Panel Design

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Advances in Intelligent Systems and Applications - Volume 2

Part of the book series: Smart Innovation, Systems and Technologies ((SIST,volume 21))

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Abstract

A low cost 4x4 matrix touch panel which based on a multiplier-free noise trapped touch algorithm is discussed in this paper. We focus on the method that filters out the noise without long delay to make a fast response and the implement detail about how to put the method into ATMEL tinyAVR, an 8-bit, low-cost microcontroller. By scheduling the measure task, process task and display task, each touch key switch is allowed to have their own independent LED indicator that shares the limited I/O with the sensing matrix. The touch panel is connected to the host controller through a 4-wire telecommunication cable and also powered by the cable. As a result, the touch panel encounters the noise coupled by the cable other than the 50/60Hz noise picked up by the user.

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References

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Author information

Authors and Affiliations

  1. Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan, R.O.C

    Yu-Hsaing Yu, Qi-Wen Wang & Tsung-Ying Sun

Authors
  1. Yu-Hsaing Yu
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  2. Qi-Wen Wang
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  3. Tsung-Ying Sun
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Corresponding author

Correspondence to Yu-Hsaing Yu .

Editor information

Editors and Affiliations

  1. of Applied Sciences, Department of Electronic Engineering, National Kaohsiung University, Jiàngōng Road, Kaohsiung, 807, Taiwan R.O.C.

    Jeng-Shyang Pan

  2. , Department of Computer Science and, National Dong Hwa University, #1, Sec. 2, Da Hsueh Rd., Hualien, Taiwan R.O.C.

    Ching-Nung Yang

  3. , Department of Computer Science and, Providence University, #200, Chung-shi Rd., Taichung, Taiwan R.O.C.

    Chia-Chen Lin

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© 2013 Springer-Verlag Berlin Heidelberg

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Yu, YH., Wang, QW., Sun, TY. (2013). A Multiplier-Free Noise Trapped Touch Algorithm for Low Cost 4x4 Matrix Panel Design. In: Pan, JS., Yang, CN., Lin, CC. (eds) Advances in Intelligent Systems and Applications - Volume 2. Smart Innovation, Systems and Technologies, vol 21. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35473-1_71

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  • DOI: https://doi.org/10.1007/978-3-642-35473-1_71

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-35472-4

  • Online ISBN: 978-3-642-35473-1

  • eBook Packages: EngineeringEngineering (R0)

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