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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

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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