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LabVIEW Introduction

• Read LabVIEW Environment Basics at NI.com
• Read Introduce and Connect sections in Online tutorial
• Build VI for temperature control (Temperature_Control_1.vi)
• Build VI for temperature control with threshold (Temperature_Control_2.vi)
• Build VI for temperature control with While Loop (Temperature_Control_3.vi)
• Build VI for temperature control wait and count (Temperature_Control_4.vi)

OpenStax CNX Online tutorial: §2 Introduction (Open Contents)

• §2.1 LabVIEW (Read)
• §2.2 LabVIEW Environment (Read)
• §2.3 Front Panel (Read)
• §2.4 Block Diagram (Read)
• §2.5 Acquiring a Signal VI Build VI (AcqSignal.vi) (same exercise as Ch. 1 in GSLV) (Find Template under File-New...-VI-From Template-Simulation-Generate & Display)

• Virtual Instrument (VI)
• Front Panel
• Block Diagram
• Palettes
  • Tools
  • Controls
  • Functions
• Controls (Inputs)
• Indicators (Outputs)
• Wiring
• While Loop
• Loop timing
• Keyboard shortcuts

CNX Online tutorial: §2 Introduction

• §2.6 Dataflow Programming (Read)
• §2.7 Express Filter VI (Do)
• §2.8 LabVIEW Documentation Resources (Read)
• §2.9 Reduce Samples VI (Build VI: ReduceSamples.vi) (same as Ch. 2 in GSLV)
• Change Graph properties to show individual points

Build VIs to study binary numbers (BinaryCounter.vi, BinaryLooper.vi)

CNX Online tutorial: §10 Data Acquisition and Waveforms

• §10.1 Overview and Configuration of DAQ Devices (Read)
• §10.2 Measurement & Automation Explorer (MAX) (Do)
  • Use MAX to confirm board I/O (A&D) (ignore temperature task)

• Express VIs
• Context Help
• Data types
• Arrays
• Data conversion
• Data acquisition
• Digital I/O
• Analog I/O

CNX Online tutorial: §10 Data Acquisition and Waveforms

• Use MAX to determine/verify DAQ board specifications (see Other resources page for PCI-6221 pin diagram)
  • Analog Input
    • Resolution
    • Scale
    • Speed
  • Analog Output
    • Resolution
    • Scale
    • Speed
  • Digital Input & Output
    • Bits
    • Signal Levels
• §10.3 Data Acquisition in LabVIEW (Read)

Digital I/O: Output

• Build 2 VIs to output byte to control LED array (Circuit Diagram)
• 1) Use DAQ Assistant for I/O board control
  • §10.14 Digital Example VI. Combine aspects of the Digital-Example-VI and your own Binary Looper VI to build DigitalLEDAsst.vi.
• 2) Use DAQmx Functions for I/O board control (Help video)(More DAQmx info)
  • Modify Write Dig Port.vi example and build DigitalLEDmx.vi to do same tasks as DigitalLEDAsst.vi

• MAX
• Resolution (bits)
• Scale (gain)
• Speed
• TTL signal levels
• DAQ Assistant
• DAQmx

• Build VI to read digital input from Function Generator (modify DigitalLEDmx.vi; use DAQmx, not Assistant)
  • 1 bit from TTL signal (DigitalBitIn.vi)
  • TTL waveform: Display on chart
• Build VI for digital output and input (DigitalInOut.vi)
  • Write (out) and Read (in) to/from external digital logic chip
    • NAND gate (7400 chip) (Circuit Diagram)
    • Use Sequence structure to order timing of Write/Read
    • Build Truth table (Experiment and LabVIEW theory)
  • For Loop: step through truth table input values, use indexing tunnel for building array of results outside loop
  • Record results and compare with LabVIEW logic
  • Case Structure: NAND, AND, OR, XOR (LabVIEW theory)

• Digital Waveform
• Waveform Array
• Index Waveform Array
• For Loop
• Tunnels
• Case Structure
• Sequence Structure

• CNX Online tutorial: §10.4 Analog Input (Read)
• Temperature sensor: TMP 36. (Circuit Diagram)
  • Build VI for temperature sensor input (as a voltage)
  • 1 point read (TempIn1pt.vi)
    • Use DAQmx in While loop (modify Digital VI to read analog signal)
    • Use DIFF input mode (see p. 4-11 (p. 33) of 322661b.pdf LabVIEW measurements manual)
    • Display single value (C, K, F)
    • Meter display (thermometer)
    • Display on chart
    • Build array inside loop with feedback node, build waveform, and display on graph

• Math calculations
• Graph vs. chart
• Array vs. waveform
• Feedback node

• Temperature sensor: TMP 36 (continued)
  • Build VI for temperature sensor input
  • Use DAQmxTiming.vi (Read info here)
  • N point read (TempInNpt.vi)
    • Read N points
    • Waveform display on graph
    • DAQ input modes

• Task timing

• Oscilloscope with Input from Function Generator
  • Build VI so that LabVIEW reads function generator input and acts as an oscilloscope (OScopeIn.vi)
  • Use DAQmxTrigger.vi (Read info here)
  • Waveform display
  • Two inputs (signal and trigger)
  • Trigger data collection (use PFI input)
  • Determine speed and resolution limits

• Digital trigger in

• Build VIs for Function generator output
  • 1 point in while loop (FncGenOut1pt.vi)
  • N points in while loop (FncGenOutNpt.vi)
  • Knobs to simulate function generator instrument
  • Determine speed and resolution limits

• Software timing
• Hardware timing

• Temperature sensor input & heater output. (Circuit Diagram)
• Build VI for Thermostat control (TempOnOff.vi)
• Record system response

• Feedback control

• Read PID Tutorial
• Temperature sensor input & heater output
• Build VI for PID control (TempPID.vi)
• Use arrays for Integral and Differential parts
• Vary gains
• Record system response

• PID Feedback
  • P: Proportional
  • I: Integral
  • D: Differential

• MAX
  • TDS1002B Digital Oscilloscope (Manual)
  • AFG3021B Arbitrary Function Generator (Manual)
  • Configure
  • Set and Query Instrument Parameters
• Instrument I/O Assistant
  • CNX Online tutorial: §11.5 Instrument I/O Assistant Exercise
  • Read, but do not build MyIOAsst.vi
  • Set and Query Instrument Parameters
  • CNX Online tutorial: Read §11.6 VISA

• Instrument Commands

• VISA
  • CNX Online tutorial: §11.7 Programming with VISA
  • Build MyVISAWrite&Read.vi
  • Set and Query Instrument Parameters
  • CNX Online tutorial: Read §11.8 About Instrument Drivers and §11.9 Using Instrument Driver VIs

• VISA
• Instrument Driver

• AFG3021B Arbitrary Function Generator
  • Output standard waveform (sine, square, etc) or arbitrary waveform (ArbWaveOut.vi)
  • Use Instrument Drivers
  • Determine AFG output resolution by observing signal on oscilloscope

• TDS1002B Digital Oscilloscope
  • Record waveform from function generator (ScopeDataIn.vi)
  • Use Instrument Drivers
  • Determine oscilloscope input resolution

• Series LRC circuit (see PH424)
• Build VI for Sinusoidal input to LRC (LRCsine.vi)
  • Vary sine frequency from Function Generator
  • Record circuit response with Oscilloscope
  • Plot response function (amplitude and phase)
  • Save data to Excel

• File I/O
• Timing
• Loop indexing
• Instrument VI Tree

• Vary impulse time manually and determine optimal pulse width
• Build VI for Impulse input (LRCimpulse.vi)
  • Fourier transform output
  • Plot response function
  • Compare two methods (sine and implulse) for measuring response function

• FFT

• Build VI for Spectral Measurement (Spectrum.vi)
• Noise Generator + Sine Wave ( Op amp adder )
• FFT
• Power Spectrum, Units
• Aliasing
• Parseval's Theorem: Power same in Time and Freq domains
• Windowing

• Build VI for Time Domain Averaging (Taverage.vi)
• Noise Generator + Sine Wave (Op amp adder)
• Trigger Oscilloscope with Fnc Gen Sync (TTL)
• Average signal to reduce noise
• Power Signal-to-Noise Ratio (SNR) with SINAD analyzer vi
• Plot SNR vs. number N of traces averaged
• Show that SNR grows linearly with N

• Lock-in Amplifier
• Phase sensitive detection