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Practical Arduino: Cool Projects for Open Source Hardware

Name: Practical Arduino: Cool Projects for Open Source Hardware
ISBN: 9781430224778

by Hugh Blemings, Jonathan Oxer

December 2009

Intermediate to advanced

457 pages

12h 49m

English

Apress

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Copyright
About the Author
About the Technical Reviewers
Acknowledgments
Introduction
1. Introduction
1.1. Fundamentals1.2. Sharing Your Work1.3. Practical Electronics for Software Developers1.3.1. Current, Voltage, and Power1.3.2. Mains Is Nasty1.3.3. Reading Schematics1.3.4. Resistance and Resistors1.3.5. Ohm's Law and Current Limiting1.3.6. Choosing Wire1.3.7. Diodes1.3.8. Power Supplies1.3.9. USB Power1.3.10. Batteries1.3.11. Wall Warts/Plugpacks1.3.12. Capacitance and Capacitors1.3.13. Fundamentals1.3.14. Capacitor Types1.3.15. Power Supply Bypass1.3.16. ESD Precautions1.3.17. Tools1.3.18. Parts1.3.19. Further Reading
2. Appliance Remote Control
2.1. Parts Required2.2. Instructions2.2.1. Test and Investigate Appliance Remote2.2.2. Assemble Reed Relay Shield2.2.3. Connect Reed Relay Shield to Remote Control2.2.4. Create Reed Relay Control Program2.2.4.1. ApplianceRemoteControl2.2.4.2. ApplianceRemoteControlCompact2.2.5. Test Reed Relay Shield and Sketch2.3. Variations2.3.1. Wireless Link2.3.2. Automatic Trigger2.3.3. Socket Connections
3. Time-Lapse Camera Controller
3.1. Parts Required3.2. Instructions3.2.1. Assemble Prototyping Shield3.2.2. Connect Camera Shutter Release3.2.2.1. Remote Shutter Release Connector3.2.2.1.1. Panasonic Cable Connection3.2.2.1.2. Canon Connection3.2.2.2. Infrared Remote Control3.2.2.3. Modify Camera3.2.3. Configure Camera3.2.4. Calculate Photo Interval3.2.5. Configure and Load Sketch3.2.6. Check Memory Capacity3.2.7. Set Up Your Shoot3.2.8. Process the Images3.2.9. Linux3.2.10. Windows3.2.10.1. Macintosh3.3. Variations
4. Virtual USB Keyboard
4.1. Parts Required4.2. Instructions4.2.1. Populate Prototyping Shield4.2.2. Prepare the UsbKeyboard Library4.2.3. Compile and Upload Sketch4.3. Variations4.3.1. Chording Keyboard
5. PS/2 Keyboard or Mouse Input
5.1. Parts Required5.2. Instructions5.2.1. PS/2 Connections5.2.2. Recycled 6-Pin Mini-DIN Sockets5.2.3. 6-Pin Mini-DIN Panel Sockets5.2.4. PS/2 Extension Cable5.2.5. Keyboard Software5.2.6. Mouse Software5.2.7. Variations5.2.7.1. Barcode Reader for a Stock Control System5.3. Resources

6. Security/Automation Sensors
6.1. Parts Required16.2. Instructions6.2.1. Security Sensor Basics6.2.2. Assemble Four-Channel Alarm Sensor Shield6.2.3. Install End-of-Line Resistors on Sensor6.2.4. Load Test Program6.2.5. PIR Placement6.3. Variations6.3.1. Visual Display Written in Processing6.3.2. Home Security System6.3.3. Multiple Buttons on One Input
7. Online Thermometer
7.1. Parts Required7.2. Instructions7.2.1. Mount PCB Plugs on Shield7.2.2. Connect Data Lines7.2.3. Assemble Sensors7.3. Load Program7.4. Variations
8. Touch Control Panel
8.1. Parts Required8.2. Instructions8.2.1. How Resistive Touch Screens Work8.2.2. Basic Touch Screen Connection Test8.2.3. Arduino TouchScreen Library8.2.4. Controlling a "Processing" Program8.2.5. Construct Hardware for Home Automation Control Panel8.2.6. Calibrate Hot Zones8.2.7. Mount Arduino
9. Speech Synthesizer
9.1. Parts Required9.2. Instructions9.2.1. Speech Output Signal9.2.2. Beginning Assembly9.2.3. SpeakJet PWM "Audio" Output9.2.4. Quick Test9.2.5. Fit Status Indicators9.2.6. Making a Line-Level Output Cable9.2.7. On-Board Amplifier9.2.8. Speech Synthesizer Software9.2.9. Create Your Own Messages9.3. Variations9.3.1. Read SpeakJet Status9.4. Resources
10. Water Flow Gauge
10.1. Parts Required10.2. Instructions10.2.1. Replace Sensor Connector10.2.2. Prepare Prototyping Shield10.2.3. Prepare LCD Module10.2.4. Fit LCD to Case10.2.5. Fit Arduino in Case10.2.6. Determine Scaling Factor10.2.7. Configure, Compile, and Test Sketch10.2.7.1. Hardware Interrupts10.2.7.2. Volatile Variables10.2.8. Flow Gauge Sketch10.2.9. Install Flow Sensor10.3. Variations10.3.1. Online Logging10.3.2. Multiple Sensors10.4. Resources
11. Oscilloscope/Logic Analyzer
11.1. Parts Required11.2. Instructions11.2.1. Assemble the Case11.2.2. Fit the Prototyping Shield11.2.3. Make Test Probes11.2.3.1. How Successive Approximation ADC Works11.2.4. Connection to Circuit under Test11.2.5. Install Software in Arduino11.2.5.1. Analog Read Version11.2.5.2. Digital Read Version11.2.5.3. Digital Read Sketch with Optimized Communications Format11.2.6. Install Processing and Run Visualization Program11.3. Variations11.3.1. Input Voltage Prescaler11.4. Resources
12. Water Tank Depth Sensor
12.1. Parts Required12.2. Instructions12.2.1. Assemble the Shield12.2.2. Determine Sensor Installation Method12.2.3. Assemble the Sensor Housing12.2.4. Assemble the Arduino Housing12.2.5. Install the WiShield Library and Driver12.2.6. Load the Tank-Level Sketch12.2.7. Prettier Web Interface12.2.8. Calibrating the "Empty Tank" Level12.2.9. Install the Sensor and Arduino12.2.10. Calibrating the "Full Tank" Level12.3. Variations12.3.1. Upload Data to Pachube12.3.2. Control Pumps or Irrigation12.3.3. Local Level Display12.3.4. Reading Multiple Tanks
13. Weather Station Receiver
13.1. Parts Required13.2. Instructions13.2.1. Test and Install the Weather Station13.2.2. Understanding the Circuit13.2.3. Assemble the Receiver Shield13.2.4. Weather Station Receiver Program13.2.5. Twitter Weather Updates13.3. Variations13.3.1. Private Online Weather Station
14. RFID Access Control System
14.1. Parts Required14.2. Instructions14.2.1. Assemble the Prototyping Shield14.2.1.1. Power Supply14.2.1.2. RFID Serial Connection14.2.1.3. Relay Output14.2.1.4. Indicator LEDs14.2.2. Manual Release Button14.2.3. Assemble the ID-12 Reader Module14.2.4. Assemble the RDM630 Reader14.2.5. Simple Stand-Alone Sketch14.2.6. Install the Strike Plate14.2.7. Install the Reader14.2.8. Install the Arduino14.3. Variations14.3.1. Extensible Read Head14.3.2. Speech Synthesizer Feedback14.3.3. Intelligent Desk Pad14.4. Resources
15. Vehicle Telemetry Platform
15.1. Parts Required15.2. Instructions15.2.1. Check the Vehicle Interface15.2.2. Obtain a USB/OBD-II or RS-232 Adapter15.2.3. Test the USB/OBD-II Adapter15.2.4. Understanding OBD-II Modes and Parameters15.2.5. Prepare the USB/OBD-II Adapter15.2.6. Assemble the OBD-II Cable15.2.7. Prepare the GPS Module15.2.8. Assemble the Power Supply on the Shield15.2.9. Fit the Serial Connections on the Shield15.2.10. Prepare the VDIP1 Module15.2.11. The LCD Module15.2.12. Logging Control Button and Status LEDs15.2.13. Mount in Sub-Assemblies in the Case15.2.14. OBDuino Mega Sketch15.2.14.1. OBDuinoMega.pde15.2.14.2. LCD.pde15.2.14.3. GPS.pde15.2.14.4. VDIP.pde15.2.14.5. Host.pde15.2.14.6. PowerFail.pde15.2.15. Using the OBDuinoMega Sketch15.2.15.1. Menu Buttons15.2.15.2. Running Logging15.2.15.3. Generate Google Earth Track15.2.15.4. Generate Charts of Parameters15.3. Variations15.3.1. Mobile Internet Connection15.3.2. Vehicle Control15.3.3. Speech Synthesizer Output15.3.4. 3D Accelerometer15.3.5. Digital Compass15.3.6. "Knight Rider"–Style Alarm Status15.3.7. Battery Condition Check15.4. Resources
16. Resources
16.1. Simple Voltage Regulators16.1.1. Power Dissipation16.1.2. Dropout Voltage16.1.3. Efficiency16.2. Driving LEDs16.2.1. Multiplexing16.2.2. Charlieplexing16.3. Output Circuitry and Isolation16.3.1. Semiconductor and Mechanical Switches16.3.1.1. Reed Relays16.3.1.2. Relays16.3.1.3. Bipolar Transistors16.3.1.4. Transistor Arrays16.3.1.5. FETs16.3.1.6. Optocouplers16.3.1.7. Solid State Relays16.4. Digital Input/Output Expansion16.4.1. Shift Registers As Outputs16.4.2. Shift Registers As Inputs16.5. Input Conditioning16.5.1. Voltage Dividers and Nonisolated Input Conditioning16.5.2. Isolated Input Conditioning16.6. Inexpensive DIY Prototyping Shields16.7. Writing an Arduino Library16.7.1. Develop Functionality As a Sketch16.7.2. Create the Library Header File16.7.3. Create the Library Class File16.7.4. Create the Example Sketch16.7.5. Create Supporting Files16.7.6. Platform-Specific Variations16.8. Summary

Content preview from Practical Arduino: Cool Projects for Open Source Hardware

Chapter 12. Water Tank Depth Sensor

Water is a precious resource in many parts of the world and many people rely on water tanks to supplement their water supply by storing collected rainwater or water pumped from a well or bore. But how do you measure how full a tank is? Tanks are constructed of opaque material to prevent algae growth and are often kept closed up to prevent mosquito infestation or access by rodents, so it's inconvenient to physically look inside. And besides, having a way to measure tank depth electronically opens up a world of possibilities, such as automatic control of pumps to fill tanks when they get low or to disable irrigation systems when not enough water is available.

The obvious way to measure tank depth is by placing ...

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Practical Arduino: Cool Projects for Open Source Hardware

by Hugh Blemings, Jonathan Oxer

Chapter 12. Water Tank Depth Sensor

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