15-Mar-2016: Day 7

Exercise 1:

Lab:
Nothing like starting the day off with a simple circuit lab.
By using the waveform generator feature of the Analog Discovery we may generate time-varying signals and use the oscilloscope to measure them.

Here we will predict the sine, triangular, and square graphs for the lab setup.

Exercise 2:

Problem:
Continuing to solve system of equations.

MATLAB doing what it does best.

Exercise 3:

Problem:
But what if there was another way to solve for unknown currents or voltages, superposition. We will treat a voltage source as a single wire and a current source as an open circuit to solve for a single element. The summation of the two answers is the value of the unknown element.

More practice with superposition.

Exercise 4:

Problem:
... perhaps a method that reminds us of transformers... robots in disguise... after all, there is more than meets the eye. Source transformation, the greatest thing since pancakes for dinner. Below is a diagram of the circuit we will be analyzing, and in the upper left is a 4 ohm resister with some current flowing through it. The task is to use our newly found technique to solve the unknown current through the 4 ohm resister.

Exercise 5:

Lab:
Learning about the source transformation technique we can now use it as part of this lab procedure in order to first predict the unknown voltage across the 6.8 kilo-ohm resister. Below is a sketch of the circuit we will build and a table with our measured and predicted values.

The percent variance between the measured and predicted values for the voltage are minimal and may be passed off to rounding error as well as the calibration in the resistances.