# Project 0: Characterizing an Unknown Component Manually

## Abstract:

For this project students were tasked with using two different programs, TinkerCAD and LTSpice, to create two different simulations of a voltage divider. Once they created these simulations they were tasked with collecting data from them and using this data to create two different graphs.

## Description:

In this weeks project students had to create two different simulations of voltage dividers on two different programs, TinkerCAD and LTSpice. A voltage divider is one of the most fundamental circuits that can be created, it basically takes a large voltage and divides it to make it smaller. In TinkerCAD they had to create a circuit where they took a power supply and connected a resistor and a photo resistor in series. They then connected a multimeter to the circuit to measure the voltage drop caused by the photoresistor. They then had to create a CSV file of manually generated data with the voltage of the power supply in the first column and the voltage drop caused by the photo resistor in the second column by changing. This data was collected by changing the voltage of the power supply from 1 volt to 10 volts and writing down the value on the multimeter at each step.

In LTSpice the students were tasked with creating a circuit where they took two resistors and a power supply and connected them all in series. They then ran the simulation and automatically collected data on the voltage from the power supply and the voltage drop caused by the first resistor in increments of one from 1 volt supplied to the circuit to 10 volts supplied in the circuit.

They then took this data and used it to create two different graphs. These graphs showed the calculated current on the X axis and voltage of the power supply on the Y axis with the slope of each of the graphs being the resistance of the first resistor. To calculate the current the equation used was:

$ I = \frac{Vps - Vpr}{R} $

After this was plotted on the graphs the line best fit was also created and added to the graph.

## Schematics:

TinkerCAD Circuit:

LTSpice Circuit:

## Data:

First table: TinkerCAD

Second table: LTSpice

## Results:

LTSpice generated graph of voltage and voltage drop:

First Graph: TinkerCAD

Second Graph: LTSpice

## Conclusion:

The main goal of this first project was to get used to using Jupyter notebooks and also to get used to creating and collecting data from two different voltage divider circuits. In my oppinion this project was very helpful for getting into the flow of this class. Although the project itself was very simple, it was a challenge to learn how to use deepnote and I believe it will also be very helpful to get feedback on the formatting of the first lab to know for future labs. Overall I believe that I got a lot out of this lab and I believe it should be continued in later years.