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.