annotated-ECE%20201%20-%20Lab%201

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The University of Tennessee, Knoxville *

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201

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Electrical Engineering

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Dec 6, 2023

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pdf

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ECE 201 : Lab 1 Caleb Hankemeier Abstract — This lab demonstrates basic applications of fundamental topics learned in class. I. I NTRODUCTION The purpose of the lab is to demonstrate some of the basic applications of the topics learned in class. The tasks in lab 1 help to demonstrate the basics in the circuits 1 course. The lab teaches students how to set up circuits in LTSpice, plot in MatLab, build physical circuits on an ADS board, and use a multimeter. All the circuits demonstrated/made are very elementary in their designs, with simple series and parallel setups used in order to demonstrate the basics of the class. II. C ALCULATIONS Due to the uniquely simple nature of the first lab, there was a noticeable absence of many calculations that would normally appear in most other labs. A greater portion of this lab utilized reading graphs and data rather than performing calculations with them. Of the few calculations that were performed in this lab (most seen in Appendix II), Ohm ’ s law, KVL, and KCL were used to algebraically prove the readings from the circuit. Mesh and nodal calculations could have been used as well. It should be know that some of the calculations used 5 V instead of the required voltage due to issues with hardware, and the calculations will not line up with what is expected. III. S IMULATIONS The simulation software used for this lab was LTSpice, MatLab, and WaveForms. For all 4 of the circuits in the lab, a model was made in LTSpice to simulate the results that the circuits would make. Additionally, the data pulled from the graphs of the functions in LTSpice were used to create graphs in MatLab. Furthermore, Waveforms was used to create sinusoidal waves for supplied voltage. Below are the images gathered from the simulations, specifically for the circuits created: IV. P ROCEDURE To perform the lab, directions from the lab instructions were followed to the best of anyone’s ability, verbatim at some points. Due to the lack of knowledge of lab equipment and poor directions in general, the lab was extremely difficult to follow along with. The previous statement is more or less an understatement for how frustrating the procedures were, but nonetheless things were figured out. The equipment used to perform the lab included the following: ADS board, oscilloscope, multimeter, MatLab software, Waveform software, LTSpice software, and a function generator. As stated previously, t here weren’t a large amount of calculations performed in this lab, as most of the lab required readings from equipment. The calculations that were performed were done by MatLab, or are on paper shown in Appendix II. Appendix II shows detailed calculations of each of the 4 circuits in the primary lab. V. R ESULTS The results for each of the circuits is shown below:

The above image is the MatLab plot of the first circuit in the lab, with 1 V and a 330 ohm resistor. The graph relates the voltage of the circuit with it ’ s current. The above 2 images are the graph of the voltage of the left circuit (sine wave) and the graph of the right circuit (flat line). The left circuit was given a sinusoidal voltage while the right circuit was given a flat voltage. The above 2 images are the graph of the voltages from the required points of the circuit placed on a graph. The above 3 graphs are the circuit and its voltage (across resistors) graph and current graph, respectively. The above 2 readings are from a function generator, one being sinusoidal and the other triangular. The peak to peak voltage of the sinusoidal is 10.1V, its period is 16.68 seconds, and its frequency is 60Hz. The peak to peak voltage of the right image is 6.92V , its period is 1.432 seconds, and its frequency is 698.3Hz.

VI. C ONCLUSION This lab, while frustrating for a first lab, taught a lot about the basics of circuits and what future labs will be like. The lab introduced many new tools and devices to use and showed how the concepts learned in class can be applied to real world situations, along with simulations. The results from this lab were nearly exact to what was read from the simulations, aside from the issue with being unable to go above 5 V. VII. A PPENDIX I

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