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Practical Arduino Cool Projects for Open Source Hardware- P2: A schematic or circuit diagram is a diagram that describes the interconnections in an electrical or electronic device. In the projects presented in Practical Arduino, we’ve taken the approach of providing both a photograph and/or line drawing of the completed device along with a schematic. While learning to read schematics takes a modest investment of your time, it will prove useful time and time again as you develop your projects. With that in mind, we present a quick how-to in this section | CONTENTS Basic Touch Screen Connection Test.126 Arduino TouchScreen Library.128 Controlling a Processing Program.128 Construct Hardware for Home Automation Control Panel.131 Calibrate Hot Zones.134 Mount Arduino.137 Chapter 9 Speech Synthesizer.139 Parts Required.140 Instructions.142 Speech Output Signal.142 Beginning Assembly.143 SpeakJet PWM Audio Output.144 Quick Test.145 Fit Status Indicators.145 Making a Line-Level Output Cable.148 On-Board Amplifier.149 Speech Synthesizer Software.151 Create Your Own Messages.153 Variations.160 Read SpeakJet Status.160 Resources.161 Chapter 10 Water Flow Gauge.163 Parts Required.164 Instructions.165 Replace Sensor Connector.165 Prepare Prototyping Shield.166 Prepare LCD Module.168 Fit LCD to Case.171 ix CONTENTS Fit Arduino in Case.173 Determine Scaling Factor.174 Configure Compile and Test Sketch.175 Hardware Interrupts.175 Volatile Variables.176 Flow Gauge Sketch.178 Install Flow Sensor.183 Variations.184 Online Logging.184 Multiple Sensors.184 Resources.184 Chapter 11 Oscilloscope Logic Analyzer.185 Parts Required.187 Instructions.189 Assemble the Case.190 Fit the Prototyping Shield.193 Make Test Probes.194 How Successive Approximation ADC Works.194 Connection to Circuit under Test.197 Install Software in Arduino.198 Analog Read Version.198 Digital Read Version.200 Digital Read Sketch with Optimized Communications Format.202 Install Processing and Run Visualization Program.203 Variations.205 Input Voltage Prescaler.205 Resources.206 x CONTENTS Chapter 12 Water Tank Depth Sensor.209 Parts Required.210 Instructions.212 Assemble the Shield.213 Determine Sensor Installation Method.215 Assemble the Sensor Housing.219 Assemble the Arduino Housing.223 Install the WiShield Library and Driver.226 Load the Tank-Level Sketch.227 Prettier Web Interface.231 Calibrating the Empty Tank Level.234 Install the Sensor and Arduino.235 Calibrating the Full Tank Level.236 Variations.236 Upload Data to Pachube.236 Control Pumps or .
