electrical workshop module3
TRANSCRIPT
Eng. Rose Hasan
Electrical Workshop Module 3: Basic Electrical Components (1-week)
ATE 1012Grade 10
Module Objectives
Identify basic electrical components such as: Lamps, motors and buzzers. Resistors, LDRS, capacitors and
inductors. Diodes.
Understand the applications of each component.
Understanding components’ coding.Eng. Rose Hasan
Eng. Rose Hasan
Module Contents
Introduction Basic Electrical Components Components Coding Class and Lab Activities
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Introduction
Have you ever opened your personal computer (PC) or your radio from the inside?
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Electrical Components
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Electrical Components
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Electrical Components
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Electrical Components
Components Coding:
Resistance Coding: Resistors are specified by their:▪ Resistance Value ▪ Tolerance
It is indicated by: color code method.
Resistance is measured in _____ ?_____.
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Components Coding: Cont…
Most resistors have 4 bands:▪ The 1st band gives the
first digit.▪ The 2nd band gives the
second digit.▪ The 3rd band indicates
the number of zeros.▪ The 4th band gives the
tolerance
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Resistor Color Code
Exercises:
State the resistor’s value and tolerance for the following resistors:
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R= R=
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Exercises:
R= R=
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Exercises:
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Resistor Color Code Calculator
http://samengstrom.com/nxl/3660/4_band_resistor_color_code_page.en.html
Search the net for resistor color code calculator and post it on my Wiki….
http://mywork-iat.wikispaces.com
Components Coding:
Capacitor Coding: Capacitors are usually specified by three quantities: _______________________ _______________________ _______________________
A number code is often used on small capacitors where printing is difficult. The 1st number ______________________ The 2nd number ______________________ The 3rd number is _______________________
The code gives the capacitance in _________________ Remark: Ignore any letters - they just indicate tolerance
and voltage rating.
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Example
You have a capacitor with "104" stamped on it.
The first two digits are: ______ The third digit is: _______ The forth digit is:__________ So, C=__________________
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Exercises:
State the capacitance value for the following capacitors:
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Exercises:
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Activity 1: Identify resistors from color code
Items Required:
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Activity 1: Identify resistors from color code (Steps)
Using the color coding method, identify the resistance value of various resistors
Fill the table below:
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Activity 2: Identify capacitance for various capacitors
Items Required:
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Activity 2: Identify capacitance for various capacitors (Steps)
Identify the capacitance value of various capacitors. Fill the table below:
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Review Basic Electrical Components
Component Symbol Function Component in the Lab
A
B
C
D
E
F
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Find the resistor value:
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Find the capacitor value:
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Finding the Resistance Value using the Resistor Color Wheel
0 1
2
3
4
56
7
8
9
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Practical Activity: Find the Resistance & the Capacitance values
Items Required:
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Steps:
First Band color and
value
Second Band color and value
Third band color and
value
Forth band color and
value
Resistance
Value stamped on the capacitor
Capacitance
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Activity 3: light intensity control using potentiometer
Items Required:
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Activity 3: light intensity control using potentiometer (Steps)
Connect the following circuit:
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Activity 3: light intensity control using potentiometer (Steps)
Rotate the spindle of the potentiometer. What do you observe on the light brightness?
-------------------------------------------------------------------------------------------------------------------- State an application of potentiometers?----------------------------------------------------------
--------------------------------------------------------How can you know the resistance
range of the potentiometer ???
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Activity 4: Demonstrate LDR Operations
Items Required:
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Activity 4: Demonstrate LDR Operations (Steps)
Connect the following circuit:
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Activity 4: Demonstrate LDR Operations (Steps)
Expose the LDR to light. What happen to the brightness of the lamp?
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Put the LDR in the dark. What happen to the brightness of the lamp?
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State some applications of LDRs.---------------------------------------------------------------------
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Future Plan
Write your opinion about today’s class on my Wiki …
Be prepared to a Quiz next Class in module #3.
Next Class: Start with Module #4
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Electrical Motor
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Resistors