Previous page View a printable version of this page Go back to the contents page for this topic Sensors Next page
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.

Displaying the Measurements

When you’ve attached a sensor to a computer, it is easy to display the measurements.

Page 1 of 4 Next page