ENGR 338 Spring 2021
Lab 1
Name: Zane Sauer
Email: zmsauer@fortlewis.edu

1. Review of Superposition, Thevenin's Equivalent Circuit, and LTSPice

2. Introduction
In this lab we reviewed ENGR 201 material including superposition and thevenin equivalent circuits using LTSpice to verify our calculations.

3. Materials and Methods
LTSpice

4. Results
Figure 1: Hand calculations of problems 1 and 2, results are boxed.


Figure 2: Results from problem 1, V3 represents the output voltage of the complete circuit.


Figure 3: Current output for problem 1. I(R1) = 1.4mA, I(R2) = 600 uA, I(R3) = 800 uA


Figure 4: Output of load in problem 2


Figure 5: Confirmation of time delay from calculations to simulation
5. Discussion
This lab went really smooth and all hand calculations matched with simulation results. The voltage output of problem 1 of 2.4V is found using superposition and hand calculations. Currents from hand calculations and simulations match as well. Results from problem 2 showed a time delay of 8 us according to hand calculations. Eth was calculated to be 1.668 V and 63.5% of Eth gave 1.056V the matching results from simulation can be seen above in Figure 5. Overall I think this was a good lab to begin remember how superposition and theveinin equivalnce work as well as LTSpice.