Interfacing IR sensor with microcontroller

[sikandar]

 I am working on a automated parking indicator , i need to connect 3 infrared tx and rx , so how am i gonna do that??? Please i need help urgently    

 

The project is to let one know of empty parking lane before entering the parking , as when a car will come between a tx and rx , it will indicate this slot as filled , please let me know how to connect IR to microcontroller !!!

[Anonymous]

http://www.engineersgarage.com/forums/8051/interfacing-ir-sensor-8051

 

go to this link..

[sikandar]

? I? have to interface three pairs(Rx n Tx) of IR and I even dont know which ports to connect to !!! Can you please help me out?

[dagakshay]

the link i had given you above… i had shown interfacing for one IR pair same way you can do it for other two and its upto you, where you want to interface. just write your code according to that.

 

just go for the links below the ir interfacing is very beutifully explained.

 

http://www.engineersgarage.com/electronic-circuit/infrared-ir-sensor

http://www.engineersgarage.com/microcontroller/8051projects/distance-measure-IR-ADC0804-AT89C51

 

 

[dagakshay]

wysiwyg_imageupload:388: Mr. sikander you asked me in that image what is that arrow mark indicating on the resistance connected to the the +VE of opamp?

 

 

wysiwyg_imageupload:389: this is variable resistance denoted as RV and below written is its value

 

you might be calling it as trimpot, Kpot or a preset…

 

go for the link(below) select component tab see the description for preset.

 

http://www.engineersgarage.com/electronic-circuit/infrared-ir-sensor

 

just let me know your project updates……

[sikandar]

 Oh yeah trimpot !!! Thanks mate !!!

[sikandar]

 Oh yeah trimpot !!! Thanks mate !!!

[sikandar]

can you plz tell me that why are we using op amp in the circuit wth the IR transmitter and IR reciever.

and secondly plz tell me that why are we using the specified resistors (100k,10k,4.7k)

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