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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

Joysticks

A joystick is a very commonly known device in the gaming world. The working principle of a joystick is to monitor the variance on the x-axis and y-axis. In a conventional joystick, two potentiometers are connected on both the x and y-axes in 2D. The variation in the potential is observed with the help of a driver circuit. The initial position of a joystick is in the center. Based on the position of the joystick, the variance is calculated using the driver circuit. The driver circuit will calculate the value to locate its actual position – that is, up, down, right, and left. It also has a push button on the center position, which can be programmed. The joystick has five pins:

  • Ground (GND) and supply (VCC): Connected to the ground and the supply
  • VRx or Hor: Reads the values from the x axis
  • VRy or Ver: Reads the values from the y axis
  • SW: The switch or push button

In Figure 9.12, the connection of a joystick can be observed:

...

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