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Computer Science IGCSEPDF 32
142 pagesrevision 46930
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Light levels
Light
Automatically switch on lights when it gets dark
(e.g., streetlights, headlights)
Magnetic field
Presence and strength
Anti-lock braking systems (ABS)
Monitor rotating machinery like turbines
Moisture
Presence and levels of
moisture
Monitor soil moisture
Detect dampness in buildings
pH
Acidity or alkaline
Monitor soil for optimal growing conditions
Track pH levels in chemical processes
Pressure
Gas, liquid or physical
pressure
Monitor tyre pressure
Track pipe pressure in manufacturing
Distance
Monitor object positions in robotics
Prevent collisions in safety systems
Proximity
Temperature
Temperature in Celsius,
Fahrenheit or Kelvin
Maintain swimming pool temperature
Control temperature in chemical processes
DATASTORAGE
Primary Storage
Primary storage is directly accessed by the CPU
It is volatile (maintains data only when device is powered,
except ROM)
Small capacity
Primary storage is much faster than secondary storage.
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