3/21 Mesh Analysis 2 & Time Varying Signal

We started with a circuit and used mesh analysis by applying KVL to solve this problem.

After this problem, we started our lab.

Mesh Analysis 2

First, we calculated the expected value for V1 and I1, and we got V1=5V and I1=-0.3224 mA.
Then, we set up the lab.

The picture above is the basic set up for this lab.

From the picture above, the measured value for V1 is 4.97V and the measured value for I1 is -0.321 mA.

From the analysis above, we calculated the % error for V1 = 0.6%
and the % error for I1 = 0.43%
From this experiment, we knew that mesh analysis worked really well.

After the lab, we did another problem about transistor.

The larger the transistor, the more heat it can take but more expensive.
We calculated the power out of the transistor is 4.266*10^-2 W, which lead us to use T092 transistor which matched what we needed.

After this problem, we did our second lab for today.
Time Varying Signal 

The picture above is the basic set up for this lab.
Picture 1:Sinusoidal wave 

Picture 2: Triangular Wave.

Picture 3: Square wave

Summary

We reviewed mesh analysis and applied it into the real circuit.
Then, we leaned how to choose and use transistor. The bigger the transistor, the more power input it can handle but more expensive, which means that to find the appropriate one is very important.

After that, we used wave form generator to create different shape of the voltage graph.