EE215_Lab_2 - EE215: Fundamentals of Electrical Engineering...

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EE215: Fundamentals of Electrical Engineering Laboratory 2 Page 1 EE 215 - Laboratory 2 - Nodal Analysis and Thévenin Equivalents Authors D. Wilson, R.D. Christie, W.R. Lynes, K.F. Böhringer, M. Ostendorf Objectives At the end of this lab, you will be able to: Construct, analyze and measure multiple-source circuits Model transistors as dependent sources, and confirm the model with measurements Develop Thévenin equivalent models of real world components (a potato battery!) Design an experiment to determine a Thévenin equivalent model (of a diode) Materials and Supplies See Laboratory 1 for information on obtaining a laboratory parts kit and multimeter, and for identifying many of the parts used in Laboratory 2. Parts for This Lab For parts (or, types of parts, like resistors) that you have already used in Lab 1, you should be able to pick the parts out from the circuit diagram and find them in your part kit. This section will discuss parts you have not worked with yet. These are: A raw potato (no kidding!) Copper and tin (galvanized) nails Red Light Emitting Diode (LED) Bipolar Junction Transistor (BJT), NPN, 2N3904 The potato is NOT supplied in the parts kit, and should be purchased from a grocery store. It provides the electrolyte for a peculiar form of battery. The copper and tin (galvanized) nails , form the electrodes of the battery. You could buy these from a home improvement store, but for your convenience they are supplied in the parts kit. Figure 1 - Types of diodes. The three on the right are Light Emitting Diodes (LEDs). The one on the left is a power diode. To the right is the diode circuit symbol, with A and K on the anode and cathode. AK Light Emitting Diodes or LEDs (Figure 1) are the colored plastic bullet-shaped parts with two parallel leads sticking out the back of the bullet. Rev 6.1 10/04
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EE215: Fundamentals of Electrical Engineering Laboratory 2 Page 2 Figure 1 - Types of transistors. The left hand lower one is the one in the lab kit. The large square ones and the large metal cans are power transistors. An NPN transistor circuit symbol, with Collector, Base and Emitter marked C, B and E respectively, is on the right side of the figure. C E B The transistor is the small black plastic part with three leads coming out. The case is shaped like a cylinder with one side shaved flat. If you look closely you can find its model number, 2N3904, printed on the flat side. Rev 6.1 10/04
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EE215: Fundamentals of Electrical Engineering Laboratory 2 Page 3 Laboratory Procedures, Measurements, and Questions Record your data and the answers to questions on a separate sheet (or sheets) of paper and hand it in at recitation section when the lab is due. You will also have to bring your breadboard with designated circuits on it to your recitation section the week the lab is due.
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EE215_Lab_2 - EE215: Fundamentals of Electrical Engineering...

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