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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

PWM using an RGB LED

In the previous section, we observed the use of write_analog() for PWM signal generation. The same principle can be employed to achieve different color intensities through an RGB LED. An RGB LED differs from the usual LED in multiple ways; the first difference is the number of pins; in a standard LED, two pins are provided, whereas an RGB LED has four pins. In Figure 9.10, an RGB LED is depicted. It is visible that an RGB LED has red, green, and blue pins, which indicate the colors, and a positive pin connects to the ground:

Figure 9.10 – An RGB LED (courtesy: https://en.wikipedia.org/wiki/Light-emitting_diode)

The most extended pin, as shown in Figure 9.10, indicates an anode. By providing the PWM signal, the LED will glow in various colors. Hence, an RGB LED is used in applications where several light hues are required from a single LED. As we have done in the case of handling the potentiometer and servo motor, we are now going...

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