CST 122 Lab 1

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North Carolina A&T State University *

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122

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Electrical Engineering

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Apr 3, 2024

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CST 122 Lab 1 M EASUREMENT E QUIPMENT & R ESISTOR C OLOR C ODE Name: Date: 06/06 NOTE: ALL LABs SHOULD BE SUBMITTED USING LAB REPORT FORMAT! Objective: The objective of this lab is to introduce students to common DC circuit measurement equipment, numerical prefixes, protoboard and the resistor color code. Parts List: DMM, Protoboard, Various Resistors, Multisim Software 1. The amount of current following in a circuit was measured to be I = 0.00037 A . (10 pts) a. Express in Powers of Ten for 10 -1 , 10 -2 , 10 -3 , 10 -4 , 10 -5 , 10 -6 0.0037 x 10 -1 A 0.037 x 10 -2 A 0.37 x 10 -3 A 3.7 x 10 -4 A 37 x 10 -5 A 370 x 10 -6 A b. Express in mA (milliamps or 10 -3 ) 0.37mA c. Express in µA (micro amps or 10 -6 ) 370µA 2. The color code on a resistor in a circuit indicates a value of R = 156,000Ω . (10 pts) a. Express in Powers of Ten for 10 1 , 10 2 , 10 3 , 10 4 , 10 5 , 10 6 15600 x 10 1 Ω 1560 x 10 2 Ω 156 x 10 3 Ω 15.6 x 10 4 Ω 1.56 x 10 5 Ω .156 x 10 6 Ω b. Express in KΩ (Kilo ohms or 10 3 ) 156KΩ c. Express in MΩ (Mega ohms or 10 6 ) .156MΩ 3. Determine the resistor value, low and high tolerance (or range) for the following color- coded resistors (10 pts)

a. 1k Ω ± 5% b. 300 Ω ± 10% 4. Launch (Open) the Lab #1 Resistor Multisim File in Course Materials. Click on Simulate to Re-Run the Program and note the new measured values resistor values in Ω’s. Record these values in the Measured columns. Given the Tolerance is 5%, record the expected range values (lower and upper) in the Range Column. Calculate the percent error and record in the % Error Column . (20 pts) Resistor Analytical Tolerance Range Measured % Error R1 (1kΩ) Brown, Black, Red Gold (5%) 950- 1050Ω 1.015kΩ or 1015Ω 1.5% R2 (2.2kΩ) Red, Red, Red Gold (5%) 2150- 2250Ω 2.2kΩ or 2200Ω 0% R3 (3.3kΩ) Orange, Orange, Red Gold (5%) 3250- 3350Ω 3.311kΩ or 3311Ω 0.33% R4 (4.7kΩ) Yellow, Violet, Red Gold (5%) 4650- 4750Ω 4.664kΩ or 4664Ω 0.76% R5 (10kΩ) 5. Build the following circuit using Multisim. Complete the following Table (20 pts): Parameter Calculated Measured (Multisim) V T 12V 12V I T 12mA 12mA R T 1kΩ 1kΩ

6. Capture an image of a Breadboard on the internet. Explain how works (10pts) It is a plastic board with tiny holes in it. The holes allow you to insert electrical components to prototype circuits. It is useful because components can easily be inserted and removed which makes it great for demonstrations.

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7. Find a Digital Multimeter and Power Supply on the web. Briefly explain the purpose of these devices. (10 pts) A digital multimeter is used to measure two or more electrical values normally volts, current/amps, and resistance/ohms. A power supply is a what is tested by a multimeter, and is responsible for delivering electricity to all the components in your computer case.