saurav_sdpl
Joined: 29 Sep 2006
Posts: 172
Helped: 2
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 06 Dec 2006 12:58 photosensing |
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I am using a IR emmitter and phototransistor for IR detection.
IR light is emitted via a12V supply and 1.2K registance.
Where as The collector registance of phototransistor is 6.2K biased with 12V supply.
Plz check whether these values are correct for the proper operation.
The reflecting surface i am using is lighting tape used in cars, cut in a triangular shape.
when i am moving the module from the top to bottom of surface i am not able to achieve any variation in voltage sensed by phototransistor.
Wat modifications i should do to overcome this problem
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