Electrical Workshop Module 3: Basic Electrical Components (1-week)
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Transcript of Electrical Workshop Module 3: Basic Electrical Components (1-week)
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
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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 ComponentsComponent 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
456
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?----------------------------------------------------------------------
----------------------- ------------------------------------------ Put the LDR in the dark. What happen to the
brightness of the lamp?----------------------------------------------------------------------
----------------------------------------------------------------- State some applications of LDRs.----------------------------------------------------------------------
-----------------------------------------------------------------
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