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Free full Course
A complete guide to capacitive touch sensors

From the basics to complete system analysis, find everything you need to know to become an expert on capacitive sensing in this comprehensive course.

Course contents

Chapter 1

CHAPTER 1:

Fundamentals of electrostatics and capacitance

Ever wondered what are the basic physical principles behind the operation of a touch screen? Are you making your first steps in capacitive sensing?

Then this chapter is just for you! After reading with chapter you will:

  • Understand the basics of electrostatics and capacitance.
  • Get an intuitive understanding of what capacitance is and how it changes, by analyzing the fundamental case of the parallel plate capacitor.​
  • Understand how capacitance behaves in actual touch sensor designs, utilizing your knowledge of parallel plate capacitors.
TAKE ME TO CHAPTER 1
Chapter 2

CHAPTER 2:

Operational principles and types of capacitive touch sensors​

If you have a basic understanding of electrostatics and want to get started on capacitive sensing, this chapter is what you’re looking for!

After reading this chapter you will familiarize yourself with:

  • The touch detection mechanism of touch sensors: how the controller translates physical touches to user experience.
  • Self & mutual capacitance touch sensors, their operational principles and their pros & cons.
  • Understand how capacitance behaves in actual touch sensor designs, utilizing your knowledge of parallel plate capacitors.
TAKE ME TO CHAPTER 2

CHAPTER 3:

Circuit analysis of touch sensors and touch screens

It is very convenient to represent a capacitive touch sensor in multiple ways to perform analysis.

In this chapter you will learn:

  • Basic circuit theory
  • All the different representations of a capacitive touch sensor
  • Examples of how to translate simple designs to schematic diagrams
TAKE ME TO CHAPTER 3
Chapter 4

CHAPTER 4:

Stack-ups and layouts of capacitive touch sensors

Stack-ups and layouts are the barebones of capacitive touch sensors.

In this chapter you will learn:

  • Common stackups, materials, and structures of capacitive touch sensors
  • Layouts of capacitive touch sensors
TAKE ME TO CHAPTER 4
Chapter 5: Basics of controllers for capacitive touch sensors

CHAPTER 5:

Basics of controllers for capacitive touch sensors

How microcontrollers (MCUs) work in capacitive sensing systems

In this chapter you will learn:

  • The role of the controller in a capacitive touch system
  • The touch controller industry, its caveats, and the operational principle of the capacitive touch controller
TAKE ME TO CHAPTER 5
Chapter 6: A closer look at controllers for capacitive touch sensors

CHAPTER 6:

A closer look at controllers for capacitive touch sensors

How microcontrollers (MCUs) work in capacitive sensing systems

In this chapter you will learn:

  • Ideal touch sensing circuit for the touch transfer method
  • An intuitive explanation of Counts
  • Common tuning parameters of capacitive touch MCUs
TAKE ME TO CHAPTER 6
Chapter 7

CHAPTER 7:

Designing a realistic touch sensing application using STM32 MCU

How to design and connect a touch sensor  to a controller of the STM32 series.

In this chapter you will learn:

  • Designing a touch sensor compatible with the STM32 controller family
  • Connecting the STM32 MCU and performing analysis
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