Electrical workshop module3

ATE 1012
Grade 10

Eng. Rose Hasan

 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

 Introduction
 Basic Electrical Components
 Components Coding
 Class and Lab Activities

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 Have you ever opened your personal
computer (PC) or your radio from the inside?

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 Resistance Coding:
 Resistors are specified by their:
▪ Resistance Value
▪ Tolerance
 It is indicated by: color code method.
 Resistance is measured in _____ ?_____.

Eng. Rose Hasan

 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

Eng. Rose Hasan

 State the resistor’s value and tolerance for
the following resistors:

R= R=

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R= R=

Eng. Rose Hasan

 http://samengstrom.com/nxl/3660/4_band_r
esistor_color_code_page.en.html
 Search the net for resistor color code
calculator and post it on my Wiki….
http://mywork-iat.wikispaces.com

Eng. Rose Hasan

 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.

Eng. Rose Hasan

 You have a capacitor with "104" stamped on
it.
 The first two digits are: ______
 The third digit is: _______
 The forth digit is:__________
 So, C=__________________

Eng. Rose Hasan

 State the capacitance value for the following
capacitors:

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 Items Required:

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 Using the color coding method, identify the resistance value of
various resistors
 Fill the table below:

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 Identify the capacitance value of various capacitors.
 Fill the table below:

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Component Symbol Function Component in the
Lab

A

B

C

D

E

F
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0 1

9
2

8
3

7
4
6
5

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First Band Second Band Third band Forth band Resistance
color and color and color and color and
value value value value

Value stamped on the Capacitance
capacitor

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 Connect the following circuit:

Eng. Rose Hasan

 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 ???
Eng. Rose Hasan

 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.
---------------------------------------------------------------------
------------------------------------------------------------------

Eng. Rose Hasan

 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

Eng. Rose Hasan

Electrical workshop module3

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