How to use Infrared sensor ?

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bianchi77

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Friends,

I want to use Infrared sensor for Line follower robot, but the output of the sensor always LOW,
How can I change it ?



Thanks
 

Hi,
Can you specify your IR sensor and IR transmitter ?
If your sensor is 38kHz, do you correctly use 38kHz pulse in transmitter ?

Thanks,
 

How can I make it "High" it's always "Low", when I lift the car in about 10 cm it's "High"
Is it white line follower robot ?
 

Why are you using the photodiode in photoelement - voltage mode? It's the least sensitive circuit you'll find and exposing a diode temperature coefficient to cap it all.
 

Why are you using the photodiode in photoelement - voltage mode? It's the least sensitive circuit you'll find and exposing a diode temperature coefficient to cap it all.

How can I make it more sensitive ?
there's op amp circuit in it.. I tried to adjust but no luck
 

I put white paper facing the sensor and without white paper, it's the same result as in the photos,
do you have idea on adjusting it ?

 

If nonmodulated DC light sensor is sufficient, you can try this circuit. It works with LM324 and single supply voltage.

 

If nonmodulated DC light sensor is sufficient, you can try this circuit. It works with LM324 and single supply voltage.

I don't have the chip and the PCB I have only LM339 with those sensors.....
I will try to make it work....rather than trying other circuit....

---------- Post added at 14:06 ---------- Previous post was at 14:02 ----------

It works with black duct tape....I tried just now...
 

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