how sensors work?

I d like to know how sensors work, it is amazing realy
IhabAsked:
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NrisimhaCommented:


Good question !

Because you can have an light sensor that detects a fotons emission and then such fotons make a electrical current that then activate an switch for closing a door or open the door or if it is for ensurance then they activate sound equipments that make a sound noise, because some thiefs are try to go into an house. Or an sound sensor that detect a sound waves and with vibrations they make electrical current in the same way as you produce a electrical current when you use a microphone and electrical current can turn on some devices in your PC. Or sensors that are used in the companies when in the some room is a fire and such a sensor detects a smoke.

For example in an Electronic computer center when there is a fire then special equipments extinguish the fire that they used a halon gas.

Nrisimha
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TommySzalapskiCommented:
For a good reference to look up basically any kind of sensor try this link.
http://www.sensorland.com/HowPage001.html
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nickg5Commented:
any specific sensors you want more information about?

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IhabAuthor Commented:
Yes , the temperature sensor
Warm regards
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nickg5Commented:
Big differences exist between different temperature sensor or temperature measurement device types. Using one perspective, they can be simply classified into two groups, contact and non-contact.
http://www.temperatures.com/sensors.html

The seven basic types of temperature sensors.
http://www.wwdmag.com/water/seven-basic-types-temperature-sensors

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I have a clock that keeps perfect time using the room temperature and humidity, as they change.
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IhabAuthor Commented:
Really,how to feels the humidity?
in this world I feel that machines become like Humans
DO you agree with me?
Warm Regards
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nickg5Commented:
Atmos is the brand name of a mechanical clock that has been manufactured by Jaeger-LeCoultre in Switzerland since 1935 which doesn't need to be wound and which keeps very accurate time. It gets the energy it needs to run from small temperature changes and atmospheric pressure changes in the environment, and can run for years without human intervention.

http://peswiki.com/index.php/Directory:Atmos,_the_Clock_Powered_by_Temperature_and_Atmospheric_Pressure_Changes
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TommySzalapskiCommented:
Here is some info on humidity sensors. There are several ways to measure humidity.
http://www.sensorland.com/HowPage062.html

I agree that computers are getting better and better. However, in face recognition, object and action detection, the board game Go, and many other things, computers are nowhere near the level of humans yet. We have a long way to go still.
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