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Robotics at Home with Raspberry Pi Pico

You're reading from   Robotics at Home with Raspberry Pi Pico Build autonomous robots with the versatile low-cost Raspberry Pi Pico controller and Python

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781803246079
Length 400 pages
Edition 1st Edition
Languages
Concepts
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Author (1):
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Danny Staple Danny Staple
Author Profile Icon Danny Staple
Danny Staple
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Table of Contents (20) Chapters Close

Preface 1. Part 1: The Basics – Preparing for Robotics with Raspberry Pi Pico
2. Chapter 1: Planning a Robot with Raspberry Pi Pico FREE CHAPTER 3. Chapter 2: Preparing Raspberry Pi Pico 4. Chapter 3: Designing a Robot Chassis in FreeCAD 5. Chapter 4: Building a Robot around Pico 6. Chapter 5: Driving Motors with Raspberry Pi Pico 7. Part 2: Interfacing Raspberry Pi Pico with Simple Sensors and Outputs
8. Chapter 6: Measuring Movement with Encoders on Raspberry Pi Pico 9. Chapter 7: Planning and Shopping for More Devices 10. Chapter 8: Sensing Distances to Detect Objects with Pico 11. Chapter 9: Teleoperating a Raspberry Pi Pico Robot with Bluetooth LE 12. Part 3: Adding More Robotic Behaviors to Raspberry Pi Pico
13. Chapter 10: Using the PID Algorithm to Follow Walls 14. Chapter 11: Controlling Motion with Encoders on Raspberry Pi Pico 15. Chapter 12: Detecting Orientation with an IMU on Raspberry Pi Pico 16. Chapter 13: Determining Position Using Monte Carlo Localization 17. Chapter 14: Continuing Your Journey – Your Next Robot 18. Index 19. Other Books You May Enjoy

Controlling Motion with Encoders on Raspberry Pi Pico

So far in this book, we’ve added sensors to our robot that can track counts as its wheels turn. We’ve also looked at a PID algorithm to close the robot control loop. We can combine these concepts to control our motors and wheels more precisely.

This combination will let us maintain a known speed on each motor and correct their relative speeds for a straight line. Encoders with some geometry will let us drive the robot a predetermined distance.

In this chapter, we will cover the following main topics:

  • Converting an encoder count into a speed
  • Using PID to maintain speed and a straight line
  • Driving a known distance
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