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IR transmitter and receiver

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what is the range ?

if you need very small range simply you can use old mouse sensors
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if you need more information about last two links
send me
 

i too need the same, i need a range of about 2 ft, can anyone pls upload the schematic
 

is the photo transistor sensitive to light ?

i mean if i send from the transmitter to the receiver and there is light in the room. is any mistake occur or no?

thanks
 

IR_Rx.JPG

please i want to know the terminal of this transistor as there is no number or datasheet for it
and the ir receiver in the ir transmitter receiver circuit has only 2pins?

the second question , is this transistor sensitive to day light or ir only?

please help as fast as possible

thanks in advance
 

Hossam, what you have is not a simple transistor. Its a complete IR receiver module. The pinouts, the way its pictured would be Output-Gnd-Vcc.

This is ideal for IR projects, but works only with modulated IR signals (usually at 36 to 40 khz).

Regards,

Anand Dhuru
 

thanks for your interest
circuit1.gif
i want to make this circuit by this transistor. but here the supply is dc volt and you told me that to work the transistor , operate on 38khz.
what is the solution?



Anand Dhuru[/QUOTE]
 

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see here
 

hossam abdo said:
i want to make this circuit by this transistor. but here the supply is dc volt and you told me that to work the transistor , operate on 38khz.
what is the solution?

Anand Dhuru
Click to expand...
[/QUOTE]

If you're building around the circuit you've attached, you cannot use the IR sensor you referred to earlier. You will need either an IR photo-diode, or a photo-transistor. And for your app, I think that would be the way to go, since you wouldnt need a long range of detection.

Anand Dhuru
 

what i need to do is a ir sensor to detect the black line. i want to make a line follower robot using this sensor instead of color sensor
 


The two are functionally the same. However, the 5mm one would probably handle more current so you can have a better range. BUT, with DC operation (no modulation), the best you can get with either would be a few cms.

Regards,

Anand
 

when i use the photo diode and direct the ir transmitter to it
the output voltage doesn't increase above 1v
the maximum value is 1v?
how to increase this output
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What values are you using for R1 and R2?

Are you sure the IR LED is lighting up? You can check this by pointing your cellphone camera at it.

Anand Dhuru
 

R1= 330 ohm R2= 10kohm

yes the ir les is lighting up?
i think the output voltage is low according to the values of R1 and R2
i want to note you that i use photo diode not photo transistor

thanks
 

That should work, did you try inverting the photo diode? You might have interchanged the anode and the cathode?
 

Do you get better results with visible light? Exposed directly to the sun, covered completely?
 

you can see
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