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DIY Microcontroller Projects for Hobbyists

You're reading from DIY Microcontroller Projects for Hobbyists

Product type Book

Published in Jul 2021

Publisher Packt

ISBN-13 9781800564138

Pages 320 pages

Edition 1st Edition

Languages

Concepts

Microcontroller

Authors (2):

Miguel Angel Garcia-Ruiz

Pedro Cesar Santana Mancilla

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Table of Contents (16) Chapters

Preface

Chapter 1: Introduction to Microcontrollers and Microcontroller Boards

Chapter 2: Software Setup and C Programming for Microcontroller Boards

Chapter 3: Turning an LED On or Off Using a Push Button

Chapter 4: Measuring the Amount of Light with a Photoresistor

Chapter 5: Humidity and Temperature Measurement

Chapter 6: Morse Code SOS Visual Alarm with a Bright LED

Chapter 7: Creating a Clap Switch

Chapter 8: Gas Sensor

Chapter 9: IoT Temperature-Logging System

Chapter 10: IoT Plant Pot Moisture Sensor

Chapter 11: IoT Solar Energy (Voltage) Measurement

Chapter 12: COVID-19 Digital Body Temperature Measurement (Thermometer)

Chapter 13: COVID-19 Social-Distancing Alert

Chapter 14: COVID-19 20-Second Hand Washing Timer

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Connecting a DHT11 sensor module to the microcontroller boards

This section deals with all the hardware components in this chapter. We will begin by connecting the DHT11 to the Blue Pill board. Connecting the DHT11 to microcontroller boards is easy because it only requires three wires.

Connecting the DHT11 to the Blue Pill board

In this section, we will connect the DHT11 to the Blue Pill, as shown here:

Figure 5.3 – The DHT11 connected to a Blue Pill microcontroller board

Figure 5.3 – The DHT11 connected to a Blue Pill microcontroller board

As we can see, the DHT11 connections are simple. In some DHT11 modules, their manufacturers recommend connecting a 5K-ohm pull-up resistor to the S (signal) pin. However, since 5K resistors are not commercially available, a resistor with a value of 4.7K-ohm is close enough to the recommended one. We did not need to connect a 4.7K-ohm to the DHT11 module that we used in our project because its electronic circuit already had a resistor like that.

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Authors (2)

Miguel Angel Garcia-Ruiz

Miguel Angel Garcia-Ruiz is an Associate Professor of Computer Science at the School of Computer Science and Technology, Algoma University, Canada. He has taught microcontroller programming and interfacing, human-computer interaction, and interaction design courses. Miguel has a PhD in Computer Science and Artificial Intelligence from Sussex University, England. He has published articles on tinkering with technology applying microcontroller boards. Miguel has conducted research projects funded by Canada's Northern Ontario Heritage Fund (NOHFC), Algoma University, and the Mexican Ministry of Education.

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Pedro Cesar Santana Mancilla

Pedro Cesar Santana Mancilla is a research professor at the School of Telematics at the University of Colima in Mexico. His research interests focus on human-computer interaction, ICT for elderly people, Internet of Things, and machine learning. He is currently serving as president of the Mexican Association on Human-Computer Interaction (AMexIHC). He is a Senior Member of the IEEE, and ACM and serves as Chair of the Mexican ACM SIGCHI Chapter (CHI-Mexico). Pedro is a member of the Mexican Academy of Computing (AMexComp) and the Mexican Society of Computer Science (SMCC).

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