You're reading from BBC Micro:bit in Practice A hands-on guide to building creative real-life projects with MicroPython and the BBC Micro:bit

Product type Paperback

Published in Dec 2022

Publisher Packt

ISBN-13 9781804610121

Length 292 pages

Edition 1st Edition

Tools

Micro:bit

Concepts

Embedded Systems

Authors (3):

Sandeep Saini

Mr. Ashwin Pajankar

Abhishek Sharma

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Table of Contents (22) Chapters

Preface

1. Part 1: Getting Started with the BBC Micro:bit

2. Chapter 1: Introduction to the BBC Micro:bit FREE CHAPTER

3. Chapter 2: Setting Up the Micro:bit and Using Code Editors

4. Chapter 3: Python Programming Essentials

5. Chapter 4: Advanced Python

6. Part 2: Programming Hardware with MicroPython

7. Chapter 5: Built-in LED Matrix Display and Push Buttons

8. Chapter 6: Interfacing External LEDs

9. Chapter 7: Programming External Push Buttons, Buzzers, and Stepper Motors

10. Part 3: Filesystems and Programming Analog I/O

11. Chapter 8: Exploring the Filesystem

12. Chapter 9: Working with Analog Input and PWM

13. Part 4: Advanced Hardware Interfacing and Applications

14. Chapter 10: Working with Acceleration and Direction

15. Chapter 11: Working with NeoPixels and a MAX7219 Display

16. Chapter 12: Producing Music and Speech

17. Chapter 13: Networking and Radio

18. Chapter 14: Advanced Features of the Micro:bit

19. Chapter 15: Wearable Computing and More Programming Environments

20. Index

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21. Other Books You May Enjoy

Handling multiple analog devices

After going through the PWM signals section, it is now time to connect more than one analog device to the Micro:bit. In this section, we will connect two analog devices, one as an input with read_analog() and another as an output device controlled with write_analog(). In Figure 9.8, at pin 0, a potentiometer is connected, and at pin 1, a servo motor is connected. Both devices are provided with a 3 V supply to complete the electrical circuit. To control the servo motor, a potentiometer passes the voltage levels acting as input values to the servo motor. The servo motor will rotate according to the input from the potentiometer:

Figure 9.8 – Connecting the potentiometer as input device and the servo motor as an output device to the Micro:bit

Figure 9.9 shows both a program and its output in the shell window:

Figure 9.9 – Operating the servo motor through a potentiometer using the Micro:bit

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