IR Detection
Ever while watching television at your house , stuck up by the non working TV remote ?? besides being scolded by your mom, that even after studying Engineering you are not able to identify what the problem is all about... ??
Well guys , here is a good news for you... There's a simple trick which can be performed , all that is required is a mobile camera. to find out whether your TV remote is all working ?
Procedure :
1.Open the camera on your mobile .
2. Point the camera on to the top of the remote (wherein you can find a small led like thing ).
3.While doing the same press any button on your remote.
Inference :
While following the above procedure if you can see the light ( the pointed led glowing on your mobile camera screen) means that your TV remote is all fine & no issues with the remote.
Working :
How does the above thing works ...
Usually all the TV remotes operate on Infra Red (IR) waves which are emitted from the TV remote on the press of any button , the same waves are received by the receiver placed inside the television set which then decodes the waves into analog signal and the required change then takes place..
Now the mobile camera , is capable of capturing the visible light along with the IR waves from the spectrum.Hence on press of any button on the TV remote IR rays are emitted from the IR led transmitter on the remote which appear on your camera screen.
Questions :
Now for all those of you who started to think , if this is the case then why don't i see the IR effect when i take usual/regular pictures , as the same IR waves also exist in the same sphere i live on ??
Well here's my say ,the mobile cameras which we use have a specific wavelength identifying capacity which means that you can very comfortably capture an IR emitter / IR source but not the IR waves ..
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| Spectrum showing all rays with their wavelengths |
