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Controlling LEDs

In this chapter, we will introduce several methods of controlling the range of NeoPixel LEDs that come with the Adafruit Circuit Playground Express. In these recipes, we will examine various ways of setting the colors of the pixels, each with its own trade-off.

We will also demonstrate how to time operations so that fades and other light animation effects can be created. NeoPixels are a powerful way of allowing a richer visual interaction with your projects. These recipes will provide you with the necessary building blocks to incorporate these visual concepts into your own projects.

In this chapter, we will cover the following recipes:

Turning on the pin 13 LED
Setting the brightness of the NeoPixel
Controlling the color of a single NeoPixel
Displaying an LED color using the RGB and hex code
Setting an LED color using color names
Setting all NeoPixels to the...

Key benefits

Load and execute your first program with MicroPython

Program an IoT device to retrieve weather data using a RESTful API

Get to grips with integrating hardware, programming, and networking concepts with MicroPython

Description

MicroPython is an open source implementation of Python 3 that runs in embedded environments. With MicroPython, you can write clean and simple Python code to control hardware instead of using complex low-level languages such as C and C++. This book guides you through all the major applications of the MicroPython platform to build and program projects that use microcontrollers. This MicroPython book covers recipes that will help you experiment with the programming environment and hardware programmed in MicroPython. You'll find tips and techniques for building a variety of objects and prototypes that can sense and respond to touch, sound, position, heat, and light. This book will take you through the uses of MicroPython with a variety of popular input devices and sensors. You'll learn techniques to handle time delays and sensor readings, and apply advanced coding techniques to create complex projects. As you advance, you'll deal with Internet of Things (IoT) devices and integration with other online web services. In addition to this, you'll use MicroPython to make music with bananas and create portable multiplayer video games that incorporate sound and light animations into the gameplay. By the end of this book, you'll have mastered the tips and tricks to troubleshoot your development problems and take your MicroPython project to the next level.

Who is this book for?

If you want to build and program projects that use microcontrollers, this book will offer you dozens of recipes to guide you through all the major applications of the MicroPython platform. Although no knowledge of MicroPython or microcontrollers is expected, a general understanding of Python is necessary to get started with this book.

What you will learn

Execute code without any need for compiling or uploading using REPL (read-evaluate-print-loop)

Program and control LED matrix and NeoPixel drivers to display patterns and colors

Build projects that make use of light, temperature, and touch sensors

Configure devices to create Wi-Fi access points and use network modules to scan and connect to existing networks

Use Pulse width modulation to control DC motors and servos

Build an IoT device to display live weather data from the internet at the touch of a button

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

AI Assistant (beta) to help accelerate your learning

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Kindle Customer Mar 06, 2021

Sehr gutes Buch. Die Beispiele funtionieren auch in der wirklichkeit.

Amazon Verified review

alf Dec 24, 2022

Sei muito pouco de electrónica! Vou tentar aprender mais qualquer coisa com este livro.

Scott H. Sep 25, 2022

A well-written and presented reference book. A wide variety of content.

Peter R. Sep 19, 2022

Kändes som all var styrt via Adafruit. Vilket jag inte tyckte om. Men troligen för att boken skrevs 2019.

wayne durden Jan 05, 2020

Most of the projects in the book deal with how to use Adafruit devices with Adafruit libraries. It's OK if that's what you like to do. As far as a cookbook goes it is more of a 'how to fix canned vegetables' than how to actually make something from scratch. I was expecting more how to do interfacing that did not rely so much on canned hardware and libraries. If you want to use this book, you will need to go ahead and get the Adafruit Circuit Playground Express in order to do most of the projects. Also there are projects using the Adafruit CRICKIT, Feather HUZZAH ESP8266, Hollowing MO Express and The micro:bit. The book is well written, well structured and easy to follow.