Sensor - An Input Device which measures a physical quantity (The amount of something) that is constantly changing. It allows a computer to know about the world around it.
![Picture](/uploads/2/4/3/6/24362708/542663153.jpg?168)
Motion Sensors - Detect Nearby Movement and are used to operate devices such as
automatic doors that open when objects or people move close to them or in a certain way.
![Picture](/uploads/2/4/3/6/24362708/851611852.jpg?102)
Light Sensors - Devices which only operate due to interaction or contact with certain lights.
House Alarm - These use motion and sound sensors to detect when burglars try to force there way into a house
Computers only understand Digital.
Real World Sensors provide Analogue Signals.
Analogue - Real World Data that changes into small increments. There are infinite possible Values.
Digital - Only 1's and 0's and it can never be anything else.
Analogue and Digital cannot interact without a data converter.
Real World Sensors provide Analogue Signals.
Analogue - Real World Data that changes into small increments. There are infinite possible Values.
Digital - Only 1's and 0's and it can never be anything else.
Analogue and Digital cannot interact without a data converter.