Book Image

M5Stack Electronic Blueprints

By : Don Wilcher
Book Image

M5Stack Electronic Blueprints

By: Don Wilcher

Overview of this book

As an embedded systems developer or an IoT developer, you can often face challenges in maintaining focus on prototyping a product concept while using a specific high-level programming language for implementation. To overcome these challenges, the M5Stack Core platform uses an ESP32 microcontroller and block code that allows you to focus on product creation and application instead of the high-level programming language. M5Stack Electronics Blueprints presents various design and prototyping approaches as well as UI layout and electronics interfacing techniques that will help you to become skilled in developing useful products effectively. This book takes you through a hands-on journey for a better understanding of the ESP32 microcontroller and the M5Stack Core's architecture. You’ll delve into M5Stack Core topics such as electronic units, light, sound, motion devices, interfacing circuits, SNAP circuit kits, Arduino applications, and building Bluetooth and Wi-Fi IoT devices. Further, you’ll explore various M5Stack core applications using a project-based learning method, including the fascinating 32-bit microcontroller device technology. By the end of this book, you’ll be able to design and build interactive, portable electronic controllers, IoT, and wearable devices using the M5Stack Core.
Table of Contents (14 chapters)
1
Part 1: M5Stack Electronics Hardware Architecture
5
Part 2: M5Stack Electronic Interfacing Circuit Projects
9
Part 3: M5Stack IoT Projects

Using the M5Stack Core speaker

The M5Stack Core speaker allows the programmable unit to be transformed into a portable creative sound generator. The M5Stack Core speaker is driven by a powerful 3W class D amplifier. The benefit of using this type of amplifier is its efficiency. Theoretical class D amplifiers have an operational efficiency of 100%. Typically, a class D amplifier has an efficiency of 90%. This high-efficiency rating is achieved by switching the amplifier’s output transistors instead of driving them linearly. A pulse width modulation (PWM) signal effect is created, thus reducing the output transistors’ thermal dissipation. Further, this output switching produces a high voltage and current amplification signal. With a reduction in thermal dissipation, the efficiency of the output transistors driving a speaker is highly effective. Figure 3.14 shows a block diagram of the M5Stack Core speaker-amplifier circuit:

Figure 3.14 – M5Stack Core speaker-amplifier block diagram

Figure 3.14 –...