Experiment 2 - ECE103. Spring 08 Experiment #2 Student...

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Unformatted text preview: ECE103. Spring 08 Experiment #2 Student name(s): [Type text] Experiment #2 Introduction to Laboratory Equipment Objective: In this lab you will be introduced to basic laboratory equipment including the power supply, multimeter, and prototype board. You will learn about the behavior of sources and resistors when they are connected together in a simple DC series circuit. * Learned Skills: How to find resistance values from Ohms law, the color bands, and ohmmeter measurements. How to layout circuits on a protoboard. How to connect the multimeter for measuring current and voltage Behavior of Ohms Law * Methodology: This lab involves measuring voltage and current and performing calculations. You are expected to show your results and work in this packet. However, you may also attach additional pages. Try to finish taking the measurements during lab time. After, a project report is required of each team. * Equipment list: 1. Protoboard, wires 2. Current and Voltage Sources (power supply) 3. Multimeter 4. Resistor 82 * General Procedures: You must take good care of the equipment and follow basic safety rules in order to maintain the equipment in good working conditions, and to prevent accidents. Always check connections before applying power to any circuit or device. You do not want to exceed the power limitations of the device or otherwise it will break down. When using the multimeter and you are not sure of the approximate values you will be measuring start by selecting the least sensitive scale setting then slowly work your way down. ECE103. Spring 08 Experiment #2 Student name(s): [Type text] Disconnect power supplies (current and voltage sources) from a circuit before measuring resistance as multimeters use internal power sources when measuring resistances. Switch the power supply off when making adjustments in your circuit connections or when adding new componants to avoid short circuit. * Basic Circuit Elements: Different elements in a circuit are identified by their respective schematic symbols: Resistor Color Bands: Carbon resistors are the most common ones, and come in a wide range of power ratings. Their resistances are identified by a color code. In addition to the resistance value, a tolerance value is included in the code. Typically carbon resistors employ 5% tolerances, and can handle W. This means that the current and voltage have to be controlled not to exceed the power ratings. On each resistor you will find 3 or 4 color bands , each color represents number, the colors which you are going to see are :- ECE103. Spring 08 Experiment #2 Student name(s): [Type text] Color Represents Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Gray 8 White 9 Silver 10% tolerance Gold 5% tolerance No 4 th band 20% tolerance -------------------------------------------------------------------------------------- Usually the first band is positioned closer to the lead. For more information refer to...
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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 2 - ECE103. Spring 08 Experiment #2 Student...

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