Home Automation Projects with Arduino

Introduction 9

Chapter 1 • A quick introduction to the Hard- and Software 11
1.1 The first Functional Test 14
1.2 Programming the Arduino 16
1.3 Resistors: A Basic Element of Electronics 19
1.4 Are you well connected? Jumper cables 20
1.5 LEDs 21
1.6 Battery power for the Arduino 22

Chapter 2 • Fire up the Arduino - Projects for beginners 23
2.1 Alarm system simulator 23
2.2 SOS Emergency signal 23
2.3 Mood lighting with a multicolor LED 24
2.4 Switches that Bounce 26
2.5 Data input using a keypad 30
2.6 Warning signals of every pitch 34
2.7 Too few port pins? You need a shift register 37
2.8 Binary counter 38
2.9 Model airfield runway lights 40
2.10 Serial Data Output 40
2.11 Voltage measurement on a row of LEDs 42

Chapter 3 • Display Technology 46
3.1 An LCD for the Arduino 46
3.2 Attention! Warning Signal Display 49
3.3 Driving Seven-Segment Displays 50
3.4 Pin-saving Shift Register 55
3.5 Universally useful: The 4x7 segment Display Module 57
3.6 A Counter… Not just for beans 59
3.7 The SevenSeg Library 63
3.8 A Digital Clock 64
3.9 For Numbers, Characters and Icons: 8x8 Dot Matrix Display 64
3.10 The Running Light Spot 67
3.11 Beaming Smileys and Glowing Icons 68
3.12 Mini Display using an LED Matrix 71
3.13 A Joystick-controlled light point 74

Chapter 4 • Measuring the Environment 77
4.1 Dry Out the Cellar: Hygrometer Monitors Humidity 77
4.2 Weather Station with LC Display 80
4.3 Workplace Bright Enough? A Digital Lux Meter 82

Chapter 5 • Sensor Technology 86
5.1 The Flame Detector 87
5.2 Alarm system with tilt switch 90
5.3 Precise Temperature Measurement with the LM35 Sensor 92
5.4 Measuring low Temperatures. 94
5.5 Shout or whisper - measure the level with a sound sensor 95
5.6 Remote Control without a Transmitter: The intelligent Clap Switch 98
5.7 Rain or shine? A water level sensor can alert you 100
5.8 Umbrella alert! – A rainfall alarm 102

Chapter 6 • Motors and Servos control the world 104
6.1 The Stepper Motor and Motor Driver Module 105
6.2 From rotation to single steps 107
6.3 Turntable to display Jewelry or scale models 109
6.4 Use the Joystick for Motor Control 109
6.5 The Servo as a Universal Actuator 110
6.6 Controlled Motor Power: The Servo 110
6.7 The Servo Library 113
6.8 Precise Servo Control 113

Chapter 7 • Banish the Spaghetti: Control Wirelessly 116
7.1 For Convenience: Remote Control with an IR Receiver 116
7.2 A Remotely Contolled LED 119
7.3 Wireless Data Reading: The RFID module 120
7.4 Contactless door entry control 124
7.5 RFID Tags Store Data 126

Chapter 8 • Experimental projects for Advanced Users129
8.1 Always the Right Time: The RTC Module 129
8.2 Digital clocks and timers for precise time measurements 134
8.3 Conway’s Game of Life 137
8.4 Hello Matrix! 140
8.5 Live Ticker and Running Text 143
8.6 Switching High Power Loads: The Relay Module 146
8.7 Remote controlled Halogen Lamp 147
8.8 Keypad Door Entry System 148

Chapter 9 • Principles of Arduino Programming 152

Chapter 10 • Use of Libraries 160

Chapter 11 • Fault finding 162

Chapter 12 • Components and Modules 163

Chapter 14 • Literature 184

Chapter 15 • Illustration Listing 185

Index 188