AQA GCSE Product Design: 1.4 - Understanding a Systems Approach When Designing

Systems Approaches:

• What happens to allow it to work? - Input
• How does it do it? - Process
• What does the product do? - Output

Inputs:

• What the product reacts to

• LDR: Light-dependant resistor

• Thermistor: Temperature sensors

  

Processes:

• How the product reacts

• Microcontrollers: Electrical processes performed on these.

• PIC chips: Reprogrammable flash memory.

  

Outputs:

• The reaction
• LEDs: Light-emitting diodes. Filaments made of tungsten
• Buzzers and speakers: Give out sound as an output. Used in alarms, timers, computer mice and loudspeakers.