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TAs: Deniz Aktas, Emine Bardakci |
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Introduction
Objective:
This lab introduces students to NI ELVIS III by showing how students can use the workstation to measure electronic component properties. Then students can build circuits on the protoboard and later analyze them with the NI ELVIS III suite of SFP instruments. This lab shows how to use NI ELVIS III workstation and controlling it with a LabVIEW program. In addition, the students will learn how to use breadboard with parallel and series connection of the components, and build a simple blinking led circuit.
1. Theory Overview
Electrical Connections on Breadboard
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Figure 6 shows LED’s has characteristic voltage-current graph. An LED starts to operate after the voltage is greater than a threshold point. Below that threshold point, LED will not light since the current flow is blocked. After that point, LED would let current flow, therefore the light emitted by the device can be observed. The light intensity is proportional with the forward current magnitude. More current would yield more emitted light.
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2. Pre-Lab Quiz
Quiz Date: xxxxxx
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3. Experimental Procedure
Before programming with the NI ELVIS III, you must first create an NI ELVIS III project. With an NI ELVIS III project, you can group together all the files relevant to your application and run VIs on the NI ELVIS III.
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Project root—Contains the host computer and the NI ELVIS III you add to the current project. To add more targets to the project, right-click the project root and select New » Targets and Devices from the shortcut menu.
My Computer—Represents the local or host computer as a target in the project.
Build Specifications—Includes build configurations for source distributions and other types of builds available in LabVIEW toolkits and modules.
RT Target—Represents the NI ELVIS III you add to the project. VIs and libraries that you add to the NI ELVIS III appear under the target in the Project Explorer window.
FPGA Target—Represents the FPGA target on the NI ELVIS III.
Build Specifications—Includes specifications for building source distributions, stand-alone real-time applications, and zip files.
Safety
Be aware of powering the NI board and be aware of not creating any short circuit on the board (connecting ground and power levels (+5V, 3.3V) is not recommended, and may create some damage on the electronic components, be careful about that.)
Hardware/Software Equipment Check
Prior to starting the lab, make sure the equipment is working by conducting the following steps:
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Step 2: Make sure that you press the open button on the device.
Experiment Details
Procedure:
4. Data Collection
Temperature Unit Conversion with Numerical Tools (30 points)
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When you click the right click of the mouse for both front and block diagram pages, you will see the indicators and control parameters.
You can find the “Simulate signal” from Programming>Waveform>Analog Wfm>Generation>Simulate Signal.
Double click on the Simulate Signal, make the signal type is Square, Frequency is 10 Hz, Amplitude is 5, duty cycle is 10 (the starting value).
Add “Analog Output” diagram from Academic I/O>Control I/O
Double click on the Analog Output, choose Analog Output (n samples) and change the configuration of the pin as B/AO0.
You can add Waveform Chart and Waveform Graph from the Silver segment on the Front panel.
Insert the screenshot for your results: Duty Cycle is 10,50,100
Make the circuit according to below figure:
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The report for Procedure 1 is expected to include:
· All the screenshots of Block Diagram and Front Panel
The report for Procedure 2 is expected to include
· All the screenshots of Block Diagram and Front Panel
· All the screenshots corresponding the graphs obtained by the steps
· Explanation of how the rectangular filter works
· Explanation of what is observed by changing the filter
The report for Procedure 3 is expected to include
· All the screenshots of Block Diagram and Front Panel
· All the screenshots corresponding the graphs obtained by the steps
· Comment on the LED behavior, is it like beating (on-off) or continuously lighting? Please, explain the logic behind duty cycle, what is it?
Responsible TAs:
Deniz Aktaş, denizaktas20@ku.edu.tr
Emine Bardakçı, ebardakci20@ku.edu.tr