Starter

1
Starter matching systems to flowcharts For
each of the following systems Write down the
name of the system and suggest the type of sensor
they might use?
2
Burglar alarm
3
Automatic doors
4
Street light
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What sensor does each system use?

• a burglar alarm
• automatic doors
• a street light

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Flow chart 1
7
Flow chart 2
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Flow chart 3
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Loops What is a loop?
Homework review Example of a system and how a
loop is used. Practical work loops revision -
the house (15 minutes)
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OBJECTIVES

• Use software to create a flowchart to simulate a
  control situation
• Test the solution
• We are going to create a flowchart showing a
  system, which is monitoring two variables at
  once.

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Keeping the right temperature how could these
be used?

• a cooling fan
• an electric fire
• a temperature sensor

What are the three temperature conditions?
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Pupil resource 7 Decision Table
Room Temperature Electric fire Cooling Fan
Too cold
Just right
Too hot
Write - on, off or do nothing
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Control systems in your home?
More complex because more conditions are being
monitored
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Using control software for a simulation involving
variables

• Control of the temperature in a room
• The optimum temperature in the room is
  between 40 60 degrees.
• Heater and Fan