Design skills Activity 4 Write your own design brief


1 Write your design brief. Remember your brief must be specific to the context and allow for as much creativity as possible.


2 Your specifications and constraints lists must include that pressing either one of the panic buttons turns on the alarm.


(5) Activity 5 Draw a circuit diagram for your system


1 Make a circuit drawing of your system, using the correct symbols and conventions.


2 Your system must have resistors in series and parallel. (10)


Making skills Activity 6


Make and test your system


1 Make your panic button system using the equipment supplied by your teacher.


2 You must make your switches yourself using scrap materials. 3 Test your system and record whether it works. 4 Make notes on how you think your system can be improved.


(15)


Communication skills Activity 7


Draw up a truth table for your device


1 Draw up a truth table for your panic button system. 2 Make sure that either panic button switch will turn on the alarm. 3 Indicate what sort of logic gate this truth table represents.


(10) Activity 8 Make a poster to advertise your system


As soon as you have finished your device, make a poster to advertise your system. Posters must be readable from at least four metres away, and must be eye-catching.


PAT total: 75 marks Practical Assessment Task 153


TERM 4


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