Computers can measure external conditions using sensors.
Different sensors are used to measure different conditions:
| Sensor |
Standard Unit of Measurement |
Condition Measured |
| Temperature sensor |
Celsius (oC) |
How hot/cold it is. |
| Light sensor |
Lux |
How light/dark it is. |
| Sound sensor |
Decibels (dB) |
How quiet/loud it is. |
| Pressure pad |
On/Off |
If a pad is being pressed. |
| Button |
On/Off |
If a button is being pressed. |
| Passive Infra Red (PIR) |
On/Off |
If an objects moves in an area. |
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| Displaying the Measurements |
When you’ve attached a sensor to a computer, it is easy to display the measurements.
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