Arduino Projects for Amateur Radio by Purdum, Jack -- Read -- Imperial Library of Trantor

Index

Cover Title Page Copyright Page Dedication About the Author Contents Preface Acknowledgments 1 Introduction

Which Microcontroller to Use? We Chose Arduino, So Now What? Interpreting Table 1-1 Making the Choice What Else Do You Need? Software Downloading and Installing the Arduino Integrated Development Environment Installing the Software Running Your First Program

2 I Don’t Know How to Program

I Don’t Need No Stinkin’ CW! Like CW, Like Programming The Five Program Steps Step 1. Initialization Step 2. Input Step 3. Processing Step 4. Output Step 5. Termination Arduino Programming Essentials The Blink Program Data Definitions Where’s the main() Function? The setup() Function The loop() Function I Thought There Were Five Program Steps? Modifying the Blink Sketch Saving Memory Remove Unused Variables Use a Different Data Type Avoid Using the String Class The F() Macro The freeRam() Function Conclusion

3 The LCD Shield Project

Libraries: Lessening the Software Burden Not All LCDs Are the Same LCD Shield Parts List Assembling the LCD Shield Breakaway Header Pins Soldering Components to the Shield Adding Components Using a Schematic An Alternative Design Loading the Example Software and Testing A “Code Walk-Through” of the “HelloWorld” Sketch Explore the Other Examples Using Your LCD Display with the TEN-TEC Rebel Under the Rebel Hood Software Modifications Conclusion

4 Station Timer

Software Version of ID Timer Magic Numbers Preprocessor Directives Fixing Bad Magic Numbers: #define A Second Way to Remove Magic Numbers: const Fixing Flat Forehead Mistakes Encapsulation and Scope Fixing Our Program Bug The static Data Type Specifier Using a Real Time Clock (RTC) Instead of a Software Clock The Inter-Integrated Circuit (I2C or I2C) Interface The I2C and the DS1307 RTC Chip BCD and the DS1307 Registers Constructing the RTC/Timer Shield The Adafruit RTClib Library Initializing the RTC Running the Program The RTC Timer Program The loop() Function A Software Hiccup Conclusion

5 A General Purpose Panel Meter

Circuit Description Construction An Alternate Design Layout Loading the Example Software and Testing Code Walk-Through Instantiating the lcd and lbg Objects The loop() Code Testing and Calibration of the Meter Changing the Meter Range and Scale Voltmeter Ammeter Changing the Scale Conclusion

6 Dummy Load

Mechanical Construction Resistor Pack Spacing Fabricating the Lid Connections Attaching the Lid to the Resistor Pack Electronic Construction Doing the Math Software Conclusion

7 A CW Automatic Keyer

Required Software to Program an ATtiny85 Connecting the ATtiny85 to Your Arduino The Proper Programming Sequence Some Things to Check If Things Go South Using the Digispark Compiling and Uploading Programs with Digispark The CW Keyer Adjusting Code Speed Capacitance Sensors The volatile Keyword Construction Conclusion

8 A Morse Code Decoder

Hardware Design Considerations Signal Preprocessing Circuit Description Notes When Using the Decoder with the TEN-TEC Rebel Decoder Software Search a Binary Tree of ASCII Characters Morse Decode Program Farnsworth Timing Conclusion

9 A PS2 Keyboard CW Encoder

The PS2 Keyboard Testing the PS2 Connector The PS2 Keyboard Encoder Software Adding the PS2 Library Code to Your IDE Code Walk-Through on Listing 9-1 Overloaded Methods The sendcode() Method Some Bit-Fiddling Isolating the Arduino from the Transmitter Testing Other Features Change Code Speed Sidetone Long Messages Conclusion

10 Project Integration

Integration Issues The Real Time Clock (RTC) Shield CW Decoder Shield PS2 Keyboard Keyer The Expansion Board Software Project Preparation C++, OOP, and Some Software Conventions C++ Header Files Class Declaration public and private Members of a Class Function Prototypes cpp Files Class Constructor Method IntegrationCode.ino Header Files Constructors How the Terms Class, Instantiation, and Object Relate to One Another The Dot Operator (.) The loop() Function Conclusion

11 Universal Relay Shield

Construction Circuit Description Construction of the Relay Shield Testing the Relay Shield Test Sketch “Walk-Through” Conclusion

12 A Flexible Sequencer

Just What Is a Sequencer? The Sequencer Design Timing Constructing the Sequencer A Purpose-Built Sequencer Programming and Testing the Sequencer Initial Testing of the Sequencer Loading the Sequencer Program and Testing Sequencer Code “Walk-Through” Modifying the Sequence Order and Delay Time Configuring the Jumpers for Different Situations Modifying the Relay Shield from Chapter 11 Alternate Listing for the Relay Shield Sequencer Conclusion

13 Rotator Controller

The Arduino Antenna Rotator Controller Supported Rotators Relay Shield Panel Meter Shield The Control Panel Adding the I2C Interface to the Relay Shield from Chapter 11 Connecting the Rotator Controller Early Cornell-Dublier Electronics (CDE) Models Later Models from HyGain, Telex, and MFJ Yaesu Models G-800SDX/DXA, G-1000SDX/DXA, and G-2800DXA Software Arduino Beam Heading Software Moving the Beam Setting a New Heading Storing a New Heading in EEPROM World Beam Headings Finding the Coordinates for a QTH Finding a Beam Heading Conclusion

14 A Directional Watt and SWR Meter

SWR and How It Is Measured Obtaining the Antenna System SWR Detectors Constructing the Directional Watt/SWR Meter Design and Construction of the Directional Coupler/Remote Sensor The Sensor Board Final Assembly of the Coupler/Sensor Interface Shield Construction LCD Shield Options Final Assembly Testing the Directional Wattmeter/SWR Indicator Calibrating the Directional Wattmeter Software Walk-Through Definitions and Variables setup() loop() Further Enhancements to the Directional Wattmeter/SWR Indicator Conclusion

15 A Simple Frequency Counter

Circuit Description Constructing the Shield An Alternate Design for Higher Frequencies Code Walk-Through for Frequency Counter Displaying the Tuned Frequency of Your Display-less QRP Rig Double Conversion Applications Adding a Frequency Display to the MFJ Cub QRP Transceiver Adding a Frequency Display to a NorCal 40 Direct Conversion Applications Other Radio Applications Conclusion

16 A DDS VFO

Direct Digital Synthesis The DDS VFO Project DDS VFO Circuit Description The Analog Devices AD9850 Breakout Module Constructing the DDS VFO Shield Adding an Output Buffer Amplifier for the DDS VFO The Front Panel and Interconnection DDS VFO Functional Description Overview EEPROM Memory Map SW1, the User Frequency Selection Switch (UFSS) SW2, the Band-Up Switch (BUS) SW3, the Band-Down Switch (BDS) SW4, Plus Step Switch (PSS) SW5, Minus Step Switch (MSS) SW6, the Encoder Control The DDS VFO Software EEPROM Initialization Program The KP VFO Software (VFOControlProgram.ino) setup() loop() Testing the DDS VFO Calibrating the DDS VFO Using the DDS VFO with Your Radio The Pixie QRP Radio Blekok Micro 40SC CRKits CRK 10A 40 meter QRP Transceiver Other Applications of the DDS VFO and Additional Enhancements Conclusion

17 A Portable Solar Power Source

The Solar Sensor Solar Charger Controller Panel Positioning and Stepper Motor Stepper Wiring Stepper Motor Driver Control Inputs Solar Panel Support Structure Stepper Motor Details Mounting the Stepper Motor Solar Panel Connections Placing the Quick Connectors The Motor Controller Shield Routing Power Cables Motor Controller Shield Wiring Altitude Positioning The Software Final Assembly Assembly and Disassembly Conclusion

A Suppliers and Sources B Substituting Parts C Arduino Pin Mapping Index