EE210
Lab 2
Mark Randall
August 30, 2010
Kirchhoff’s Voltage and Current Laws
Purpose: To build and test Kirchhoff’s Laws using circuit components and Lab equipment.
1.
Construct the circuit below on your superstrip. After, constructing the circuit use the digital
multimeter (DMM). To measure the voltages ACROSS each resistor. Record the voltages in your
lab notebook. Use this data to prove Kirchhoff’s voltage law for each loop.
2.
Construct the circuit below on your superstrip. Measure the voltage ACROSS each resistor and
record in you lab notebook. Using Ohm’s Law calculate the current flowing through each
resistor. Using the calculated values verify Kirchhoff’s Current Law at node A.
3.
Using LTSPICE Construct the circuit above and verify that your measured data from the lab is
representative of the measurements obtained when using LTSPICE. (Include printed copy of the
simulated results in your lab notebook). In the results section of your lab notebook note
differences in you measured and simulated data. Include speculations/reasons why there might
be some variation.
Super Strips (BreadBoard)
Breadboard or Super Strips are made for rapid prototyping of simple Electrical Circuits using
through hole components. Figure 1 (left) is a picture of a single breadboard. Figure 1(right) has
yellow lines that show how the board is internally connected. Note: the items labeled Power
and Ground bus. Although this is not necessary it is often the case that the holes on the outside
of the bread board will be used as either a power or ground bus.
Figure 1
When constructing circuits I have found that it is much easier to troubleshoot the circuit if you
try to construct the circuit in such a way that the actual circuit is laid out so that it looks like the
circuit diagram. Figure 2 show circuits 1 and 2 from lab 2 using this technique.
Figure 2: it is assumed that the red post has been connected to the +5 side of the DC power supply and that the back post
has been connected to the GND terminal of the DC power supply.