Experiment 4

# Experiment 4 - ECE103 Spring 08 Experiment#4 Student name(s...

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ECE103. Spring 08 Experiment #4 Student name(s): [Type text] Experiment #4 DC Current-Voltage Characteristics of Resistors, Diodes, Capacitors and Inductors. Objective: In this lab you will measure and plot the DC I-V characteristics of some common circuit elements- resistors, diodes, capacitors and inductors. * Learned Skills: Practice the layout of circuits on a protoboard. Use MATLAB to plot data and solve equations Take measurements using a multimeter Observe the current-voltage characteristics of new electronic components. * Equipment list : 1. Protoboard, wires (from your lab kit) 2. Current and Voltage Sources (power supply) 3. Multimeter 4. Resistors: R 1 = 82 Ω and R 2 = 1k Ω 5. Diode (1N4007), Capacitor (1 μ F) and Inductor (1 mH) * Part (I) I-V characteristics of two resistors (50 points): 1.) Check the values of the 82 Ω and 1k Ω resistors (one at a time) using the ohmmeter and compare the ohmmeter reading with the value designated by the color code printed on the resistors. Ohmmeter reading Color code value Resistor R 1 = 82 Ω Resistor R 2 =1k Ω 2 .) Construct the circuit in figure (1) on your proto-board using R 1 . Use the power supply terminals that are rated for 25V maximum and make sure you are adjusting the voltage associated with these terminals rather than the 5V maximum terminals.

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ECE103. Spring 08 Experiment #4 Student name(s): [Type text] 3) Now vary the voltage source, Vs, value according to the table below, and measure the output voltage, Vout, and the current, I, through R1. Note that Vout is also the voltage across R1. Make the measurements for each value listed for Vs and record your results in the table. Be careful to account for the units displayed on the multimeter. R 1 Measurements 82 Ω Vs(V) I (mA) Vout (V) -5 -4 -3 -2 -1 0 1 2 3 4 4) Now replace R 1 with R 2 and repeat step 3. R 2 Measurements 1 k Ω Vs(V) I (mA) Vout (V) -5 -4 -3 -2 -1 0 1 2 3 4
ECE103. Spring 08 Experiment #4 Student name(s): [Type text] Current I Anode Cathode 5) Plot the Current I (y axis) vs. the Voltage V (x axis) for both resistors using MATLAB and attach the plot to your report. - The relationship between voltage and current, which is given by the equation V=IR, is

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## This note was uploaded on 10/28/2008 for the course ECE 103 taught by Professor Marconi during the Spring '08 term at Colorado State.

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Experiment 4 - ECE103 Spring 08 Experiment#4 Student name(s...

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