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

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

Working with a microphone

So far, we have generated different sound outputs using the Micro:bit. The Micro:bit is also equipped with a microphone. This microphone can be used to detect sound from the environment. This section will teach us how to handle speech using a Micro:bit. The microphone is present on the front of the Micro:bit V2. Figure 12.5 shows its location:

Figure 12.5 – Location of the microphone on the Micro:bit V2 (courtesy: https://microbit-micropython.readthedocs.io/en/v2-docs/_images/microphone.png)

The microphone that’s built inside the Micro:bit has a sensitivity of -38dB ±3dB @ 94dB SPL. It has an SNR of 63dB. The microphone can detect frequencies from 100 Hz to 80 kHz. The complete datasheet for this microphone is available at https://www.knowles.com/docs/default-source/model-downloads/spu0410lr5h-qb-revh32421a731dff6ddbb37cff0000940c19.pdf?Status=Master&sfvrsn=cebd77b1_4.

In MicroPython, the microphone can respond...

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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

Table of Contents (22) Chapters

Working with a microphone

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Authors (3)

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