Alarms : Design Technology 4D
Alarms are used for lots of different reasons.
Can you think of ways that alarms are used?
Warn of fires
Warn of Burglars
Help us to know when
someone enters a shop.
Warns when someone's
breathing has stopped
Burglar alarms can have lots of different features.
Can you think of things that are used in a security
system?
A house security system might have some or all of these
features:
•a floodlight
•house lights that come on after dark and go off in the
morning,
•a door alarm based on a pressure pad
•burglar alarm with a loud buzzer and flashing lights
Can you draw and label a house security system with
•a floodlight and house lights that come on after
dark and go off in the morning,
•a door alarm
•and a burglar alarm with a loud buzzer and flashing
lights
Write a sequence of instructions to switch an
alarm on and off.