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karimulla211
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Quote karimulla211 Replybullet Topic: implemeting automatic on/off control of fan
    Posted: 26-Nov-2011 at 5:41pm
Hi, i am karimulla from evm college of engg. i am very much interested in doing a project with my new idea, can a static fan automatically switch off after a person entering into the room?????????????????

 
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PrashanthS
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Quote PrashanthS Replybullet Posted: 18-Dec-2011 at 9:42pm
I guess you meant switching fan on when a person enters the room and off when there is no one. You can do this with the help of motion sensors, like what is used for lights to save power.

The "motion sensing" feature on most lights (and security systems) is a passive system that detects infrared energy. These sensors are therefore known as PIR (passive infrared) detectors or pyroelectric sensors. In order to make a sensor that can detect a human being, you need to make the sensor sensitive to the temperature of a human body. Humans, having a skin temperature of about 93 degrees F, radiate infrared energy with a wavelength between 9 and 10 micrometers. Therefore, the sensors are typically sensitive in the range of 8 to 12 micrometers.

The devices themselves are simple electronic components not unlike a photosensor. The infrared light bumps electrons off a substrate, and these electrons can be detected and amplified into a signal.

 
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rannielle
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Quote rannielle Replybullet Posted: 03-Jun-2014 at 2:19pm
sir ...hmm can you give me the description of this project ..
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Stranger
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Quote Stranger Replybullet Posted: 07-Jul-2014 at 1:47pm
Cool O2 Automatic Sensor Fan

An auto on/off fan was built based on a temperature sensor, two motion sensors, a fan, and a servo. The fan turns on when the ambient temperature reaches a certain degree. The motion sensors are used to track a person’s movement which then the servo will rotate the fan toward that movement accordingly.

A microcontroller was used to control the overall operation of this fan. A program has been written and downloaded into the microcontroller to control the temperature for powering on/off, and to control the degree of rotation of the servo as it receives signals from the motion sensors.

Download Project - Cool O2 Automatic Sensor Fan
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Stranger
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Quote Stranger Replybullet Posted: 07-Jul-2014 at 2:07pm
Temperature Controlled Fan for Home Application - http://eprints.uitm.edu.my/686/1/NIK_LUQMANUL_HAKIM_BIN_NIK_ARIFFIN_06_24.pdf
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