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Arduino Electronics Blueprints
Arduino Electronics Blueprints

Arduino Electronics Blueprints: Make common electronic devices interact with an Arduino board to build amazing out-of-the-box projects

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Arduino Electronics Blueprints

Chapter 2. Programmable DC Motor Controller with an LCD

A programmable logic controller (PLC) is an industrial computer that is used to operate various electronic and electromechanical devices that are wired to I/O wiring modules. The PLC receives signals from sensors, transducers, and electromechanical switches that are wired to its input wiring module and processes the electrical data by using a microcontroller. The embedded software that is stored in the microcontroller's memory can control external devices, such as electromechanical relays, motors (the AC and DC types), solenoids, and visual displays that are wired to its output wiring module. The PLC programmer programs the industrial computer by using a special programming language known as ladder logic. The PLC ladder logic is a graphical programming language that uses computer instruction symbols for automation and controls to operate robots, industrial machines, and conveyor systems.

The PLC, along with the ladder...

Parts list

The following list comprises the parts that are required to build the programmable motor controller:

  • Arduino Uno: one unit
  • 1 kilo ohm resistor (brown, black, red, gold): three units
  • A 10-ohm resistor (brown, black, black, gold): one unit
  • A 10-kilo ohm resistor (brown, black, orange, gold): one unit
  • A 100-ohm resistor (brown, black, brown, gold): one unit
  • A 0.01 µF capacitor: one unit
  • An LCD module: one unit
  • A 74LS08 Quad AND Logic Gate Integrated Circuit: one unit
  • A 1N4001 general purpose silicon diode: one unit
  • A DC electric motor (3 V rated): one unit
  • Single-pole double-throw (SPDT) electric switches: two units
  • 1.5V batteries: two units
  • 3V battery holder: one unit
  • A breadboard
  • Wires

A programmable motor controller block diagram

The block diagram of the programmable DC motor controller with a Liquid Crystal Display (LCD) can be imagined as a remote control box with two slide switches and an LCD, as shown in following diagram:

A programmable motor controller block diagram

The Remote Control Box provides the control signals to operate a DC motor. This box is not able to provide the right amount of electrical current to directly operate the DC motor. Therefore, a transistor motor driver circuit is needed. This circuit has sufficient current gain hfe to operate a small DC motor. A typical hfe value of 100 is sufficient for the operation of a DC motor. The Enable slide switch is used to set the remote control box to the ready mode. The Program switch allows the DC motor to be set to an ON or OFF operating condition by using a simple selection sequence. The LCD displays the ON or OFF selection prompts that help you operate the DC motor. The remote control box diagram is shown in the next image.

The idea behind the concept...

Let's build it!

In order to build the programmable DC motor controller, follow the following steps:

  1. Wire the programmable DC motor controller with the LCD circuit on a solderless breadboard, as shown in the previous image as well as the circuit's schematic diagram that is shown in the next image.
  2. Upload the software of the programmable motor controller to the Arduino by using the sketch shown next.
  3. Close both the Program and Enables switches. The motor will spin.
  4. When you open the Enable switch, the motor stops.

The LCD message tells you how one can set the Program switch for an ON and OFF motor control. The Program switch allows you to select between the ON and OFF motor control functions. With the Program switch closed, toggling the Enable switch will turn the motor ON and OFF. Opening the Program switch will prevent the motor from turning on. The next few sections will explain additional details on the I/O interfacing of discrete digital logic circuits and a small DC motor that...

Summary

In this chapter, a programmable motor controller was built by using an Arduino, AND gate, and transistor motor driver. The fundamentals of digital electronics, which include the concepts of Boolean logic expressions and truth tables were explained in the chapter. The AND gate is not able to control a small DC motor because of the high amount of current that is needed to operate it properly. PMOSFET (IRF521) is able to operate a small DC motor because of its high current sourcing capability. The circuit that is used to wire a transistor to a small DC motor is called a transistor DC motor driver. The DC motor can be turned on or off by using the LCD cursor selection feature of the programmable DC motor controller.

In Chapter 3, Talking Logic Probe, we will have a discussion on how to make an electronic tester that gives an output of the binary state (high or low) of a digital logic gate circuit by using a programmable text-to-speech module. EMIC 2, a programmable text-to-speech module...

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Description

This book is intended for those who want to learn about electronics and coding by building amazing devices and gadgets with Arduino. If you are an experienced developer who understands the basics of electronics, then you can quickly learn how to build smart devices using Arduino. The only experience needed is a desire to learn about electronics, circuit breadboarding, and coding.

Who is this book for?

This book is intended for those who want to learn about electronics and coding by building amazing devices and gadgets with Arduino. If you are an experienced developer who understands the basics of electronics, then you can quickly learn how to build smart devices using Arduino. The only experience needed is a desire to learn about electronics, circuit breadboarding, and coding.

What you will learn

  • Add SD and wavefile libraries to your Arduino code
  • Get to grips with SD card SPI communications
  • Interface an IR detection circuit to Arduino
  • Wire an OLED LCD to Arduino
  • Install the Nordic nRF8001 Bluetooth Low Energy code to Arduino
  • Build an HMI (Human Machine Interface) from a web page using JavaScript
  • Connect Arduino to a virtual server (Breakout.js)
  • Wire a small DC motor driver to Arduino with a transistor and diode circuit
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Publication date, Length, Edition, Language, ISBN-13
Publication date : Jul 24, 2015
Length: 252 pages
Edition : 1st
Language : English
ISBN-13 : 9781784393601
Vendor :
Arduino
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Product Details

Publication date : Jul 24, 2015
Length: 252 pages
Edition : 1st
Language : English
ISBN-13 : 9781784393601
Vendor :
Arduino
Category :
Tools :

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Table of Contents

11 Chapters
1. A Sound Effects Machine Chevron down icon Chevron up icon
2. Programmable DC Motor Controller with an LCD Chevron down icon Chevron up icon
3. A Talking Logic Probe Chevron down icon Chevron up icon
4. Human Machine Interface Chevron down icon Chevron up icon
5. IR Remote Control Tester Chevron down icon Chevron up icon
6. A Simple Chat Device with LCD Chevron down icon Chevron up icon
7. Bluetooth Low Energy Controller Chevron down icon Chevron up icon
8. Capacitive Touch Sensing Chevron down icon Chevron up icon
9. Arduino-SNAP Circuit AM Radio Chevron down icon Chevron up icon
10. Arduino Scrolling Marquee Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
(3 Ratings)
5 star 33.3%
4 star 33.3%
3 star 33.3%
2 star 0%
1 star 0%
Requin Aug 12, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
It’s a great book. I’ve learned a lot of new stuff, while reading it. And it gave me inspiration for some new projects using a web HMI. There are good and numerous graphics as well as interesting background information’s that usually aren’t covered in similar books. I clearly noticed the educational and the industrial background of the author. It’s suitable for beginners but the presentation of the content gets you quickly in advanced topics, if you are interested.
Amazon Verified review Amazon
viveka Mar 15, 2018
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Good reference book
Amazon Verified review Amazon
Sid Young Sep 01, 2015
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
There are stacks of books on the Arduino these days and as time goes by they become more and more advanced with host of sophisticated projects. Gone are the days of "lets flash an LED" style project books, these days the availability of quality interface boards and better quality code with them has driven the hobby and commercial embedded controller market to new highs and this has led to a new interest in real world device control.This book aims to provide a small subset of real world interfacing solutions. Its suitable for use as a reference on a small range of devices which puts it in the more advanced interfacing books category and an ideal book for those looking to build projects that connect to the real world."Arduino Electronics Blueprints" provides 10 chapters of simple projects that build on earlier chapters, although not highly sophisticated projects, there is room to utilize the concepts in real-world applications. Each project incorporates electronic modules that are themselves usable in a range of other projects. The book's authors have made reuse of "off the shelf components" a high priority and anything that needs to be crafted by hand is laid out in a simple fashion so that basic skills are needed to assemble most projects.When I started reading each chapter I was impressed at the extent of theory provided on the various components that the project would incorporate but there should have been more emphasis on controlling power devices rather than small DC motors.As an example, the Simple Chat server integrates the LCD module (simple in itself) but then incorporates the ability to use the Nordic nRF8001 Bluetooth IC with details of its internal workings, interfacing and coding, the project then extends with an off the shelf module. Finally it ends with an interface to an Android Smart phone. Ideally, this should have also included connecting some solid state relays to control AC power but it can be adapted if needed.In each chapter the Theory of Operation is outlined very well. There does seam to be a leaning for DC servo motor projects but there is also InfrRed, Bluetooth, driving a range of other devices like SD cards, LCD modules, MOSFET driving, 7-segment displays, USB interfacing and interfacing to a web server. Along the way interfaces like SPI are detailed, basic electronic interfacing is explained and incorporated in many projects.A quick analysis of the chapters:Chapter 1: A Sound Effects Machine uses the SD card to store WAV (sound) files and an LED bar graph driven randomly to the audio output. The chapter introduced SPI concepts and adds know how into adding third part libraries (the TMRpcm library from GITHUB).Chapter 2: Programmable DC Motor Controller with an LCD - introduces transistor motor drive circuits as well as driving MOSFETs. It also covers driving an LCD, using it as the main User Interface.Chapter 3: A Talking Logic Probe - This is a strange project but the chip that is used for speech synthesis (the EMIC 2 Text to Speech module) can be used in a host of other applications.Chapter 4: Human Machine Interface yet another motor drive project but with a twist, the control code is via a web page hwich you build and deploy then use the USB interface to talk to the Arduino that provided the motor control.Chapter 5: IR Remote Control Tester - The chapter title sums this project up but along the way the IR signals and communication protocols are detailed and with it driving the commonly used Arduiono LCD module.Chapter 6: A Simple Chat Device with LCD - Two chat devices are built, the first using serial the second using the Nordic nRF8001 Bluetooth device and incorporating an Android Smartphone.Chapter 7: Bluetooth Low Energy Controller is another example with a motor drive circuit (using a TPS2812C controller IC) but controlled using the BlueTooth communications from the previous chapter. In addition a 7-Segment display is incorporated. Control is performed via the Smartphone.Chapter 8: Capacitive Touch Sensing - Using a capacitive touch plate you build, a circuit drives a 555 timer which is interfaced to an Arduino that then drives a servo motor.Chapter 9: Arduino-SNAP Circuit AM Radio - I'm not sure how much use an AM radio is these days but the project incorporates a number of different components from the other projects. In over all terms this project does not add much in the way of new interfacing techniques.Chapter 10: Arduino Scrolling Marquee - OLED displays are becoming popular and this project uses one for output. It incorporates a good theory of operation of a typical OLED device.Whats missing?There is a lot missing from this book, no discussion on ethernet or WiFi, no Arduino web server integration and facing with devices like relays and other sensors. While there are some electronics outlined in the book, there is little in the way of real power control for controlling average household devices. Perhaps that's content for another book.If your into building projects then this book will give you some new ideas.
Amazon Verified review Amazon
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