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BBC Micro:bit in Practice

BBC Micro:bit in Practice

By : Ashwin Pajankar, Abhishek Sharma, Sandeep Saini
5 (1)
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BBC Micro:bit in Practice

BBC Micro:bit in Practice

5 (1)
By: Ashwin Pajankar, Abhishek Sharma, Sandeep Saini

Overview of this book

This book is a one-stop guide for learning BBC Micro:bit with MicroPython, exploring many hardware components and programming techniques to provide detailed insights into developing practical applications with the Micro:bit. It will also show you how hardware components can be manipulated using a combination of Micro:bit and MicroPython for developing practical projects. BBC Micro:bit in Practice will help you gain a holistic understanding of the BBC Micro:bit platform and MicroPython programming, guiding you through mini projects aimed at developing practical knowledge of circuit design and writing programs. You’ll learn how to write programs for working with built-in LEDs and buttons, interfacing external LEDs, buttons, motors, buzzers, and much more. You’ll also work with built-in radio, speakers, accelerometer, and a compass. You’ll dive into concepts related to the Micro:bit filesystem, interfacing external displays, and working with libraries in detail before exploring sewable circuits and wearable technology. After reading this Micro:bit book, you’ll understand how to apply principles in electronics and MicroPython to create interesting real-life projects from scratch.
Table of Contents (22 chapters)
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1
Part 1: Getting Started with the BBC Micro:bit
6
Part 2: Programming Hardware with MicroPython
10
Part 3: Filesystems and Programming Analog I/O
13
Part 4: Advanced Hardware Interfacing and Applications

Capacitive touch

Touch is one of our basic senses. We touch various objects with our fingers to feel them and obtain information about their texture, temperature, and other surface properties. On the Micro:bit, round pins 0, 1, and 2 can be touched to provide input from the human touch. These pins are available on both versions of the Micro:bit. They work on the principle of resistive touch. When we touch these pins, a connection to the ground of the Earth is established through our fingers. Therefore, the ground is always required while providing inputs from these pins.

In this chapter, we will learn about the touch sensor, which is only supported on V2. The sensor is present on the front side of the Micro:bit. Its location is above the LED matrix, as shown in Figure 14.1:

Figure 14.1 – Capacitive touch sensor on the Micro:bit V2

Any capacitive surface activates the capacitive touch sensor. Our skin is a capacitive surface as we access modern smartphones...

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