PSpice

The results of the tutorial

After using PSpice for the the tutorial, these are some notes that helped me work through problem 6 on assignment 8:

• Remember to place a ground; the "floating node" error I had was the result of not defining a ground voltage.
• I kept having to add libraries and hunt around for the part locations. Resistors are under "ANALOG," voltage sources and current sources are under "SOURCE," and grounds are under "0."
• I try to keep the wire as clean as possible, i.e., using a single wire to connect elements instead of patching a bunch together.
• Make sure the wire is not passing through a circuit element. This can mess everything up and is sort of tricky to spot.
• You can end wire or element placement by pressing Esc (instead of right clicking).
• Define another target directory to save projects in, as the default one is buried way within the C:/ volume somewhere.
• Be sure to apply settings once you've edited them in the configuration window.
• After running the simulation profile, you can click on the I and V buttons to display all voltages and currents in the circuit.

For the homework assignment, I first worked out the solutions by hand for some nodal analysis practice:

After this, I went through and drew up the circuit in PSpice. It was very similar to the tutorial because the parts were mostly identical. The only new element was a voltage source, which was also located in the "SOURCE" library. I created a simulation profile and brought up the currents and voltages. The results verified my answers, because 

12.31 mA * 25 V = 307.75 mW = Pv

and 

3.208 mA * 2 kOhms = 6.416 V = V1

The PSpice model of #8