Transcript Computers at Home & Embedded Processors(Part 3 - CPA-YYSS

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Uses of Computers in Household Appliances
Computers At Home
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Uses of Computers in Household Appliances
Objectives
1. State the characteristics of household
devices that are controlled by embedded
processors
2. State the factors that affect the use of
Embedded Processors
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Uses of Computers in Household Appliances
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Introduction
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Computers are found in many areas of our
life. The type of computer that most
people are familiar with is the desktop
computer.
A typical desktop computer
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Introduction
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Not all computers are shaped like a
desktop computer. In fact, some
computers do not look like desktop
computers at all.
A panel computer
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Uses of Computers in Household Appliances
1.1 Household Appliances that are Computers
Characteristics of a Computer
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1.1 Household Appliances that are Computers
Characteristics of a Computer
Consider the typical washing machine:
Memory : Stores the amount of time
needed for each type of wash
Input :
Type of wash
required e.g.
spin, soak, rinse
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Processing :
Controls how much
water to use. Controls
the movement of the
washing drum
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Output :
Beeping sound
when wash is
complete
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1.1 Household Appliances that are Computers
Characteristics of a Computer
Consider the typical washing machine:
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It can be classified as a very simple computer.
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The washing machine runs
only 1 program. It cannot be
installed with other new
programs.
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1.1 Household Appliances that are Computers
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Household appliances that come with
embedded processors can be considered to
be very simple computers because the
processors have the 4 characteristics of the
von-Neumann machine.
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1.1 Household Appliances that are Computers
Common Household Appliances that Have
Embedded Processors
Microwave Oven
Oven for making bread
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LCD Television
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Uses of Computers in Household Appliances
1. Input, process, output, memory
2. Pocket calculator, digital watch, digital camera, mobile phone
3. They are special-purpose computers because they cannot be
installed with other new programs.
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1.2 A Toy that Has an Embedded Processor
When your equipment needs batteries or
electricity to run, it probably has an embedded processor.
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1.2 A Toy that Has an Embedded Processor
Electronic Component - Description
Resistor - The little cylinder with many
coloured strips, which controls electric
current flow.
Capacitor - The component that is
coloured orange or green. It stores
electricity.
Transistor - The black little plastic
block. This amplifies electric current.
Processor - The long piece of black
plastic with many legs. This controls the
motion of the car.
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Uses of Computers in Household Appliances
By looking at its location, color, shape and size
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1.3 Factors Affecting the use of Embedded Processors
1. Cost
A complex processor
2. Complexity
3. Power efficiency
4. Knowledge
5. Imagination
The Human Transporter
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Summary
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1.
A computer is any device that has the
ability to input, output, process and
store data or information.
2.
Many household appliances are
operated by embedded processors.
These are special-purpose computers
because they cannot be used for other
jobs. Embedded processors help
automate dull repetitive tasks.
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Summary
3.
4.
5.
6.
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Embedded processors are more widelyused now.
A few embedded processors can be
found in household appliances.
Exploring the internal components of
household appliances can be
dangerous because there are
components that store electricity.
High cost, complexity, high power
consumption rate and limited knowledge
are factors that used to limit the use of
embedded processors.
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