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A complete guide to capacitive touch sensors​

Chapter 6: A closer look at controllers for capacitive touch sensors

Chapter 6: A closer look at controllers for capacitive touch sensors
About this chapter

In the previous chapters the readers are introduced to the basics of microcontrollers for capacitive touch sensors.

In this chapter, we’ll analyze an ideal touch sensing circuit, based on the charge transfer method. Then, we’ll give you an example that provides an intuitive explanation of how the controller uses counts to detect touch events. Finally, we’ll analyze some of the most important parameters you’ll come across when tuning a controller.

Table of contents

6.1 Ideal touch sensing circuit for the touch transfer method.

6.2 An intuitive explanation of Counts.

6.3 Common tuning parameters of capacitive touch MCUs.

Get started:

Ideal touch sensing circuit for the touch transfer method

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Credits

Written by the Fieldscale team with content from Kostas Mpazirgiannis, along with contributions from Giorgos Papazoglou.

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