Can we use ir receiver to measure wavelength?

Using Arduino Sensors
1

Hi everyone,
I'm working on a school project right now where I'm trying to study how IR thermometers work, and I have a lack of materials so I'm using whatever I have.
I've done some experiences with an IR thermometer and IR temperature sensor, to test their efficiency and to understand how they work.
and today I'm trying to simulate what I've learned.
all I've got is an IR receiver that I want to use to measure the wavelength/flux, to estimate the temperature of the transmitter/LED... (i know there's a difference between thermopile and photodiode but I think that I don't have the right materials).
and the problem is I don't know how to use it correctly, I've tried measuring the voltage (between Out and Gnd) for different wavelengths to see if I can get a relation between the two of them, but I've gained nothing (i get always a voltage of 5V so I think it's giving me back the VCC or maybe it's just not possible).
so can anyone help me, please?
I'll leave here the datasheet of the IR receiver:
English version: http://eeshop.unl.edu/pdf/VS1838-Infrared-Receiver-datasheet.pdf
original version: https://www.elecrow.com/download/Infrared%20receiver%20vs1838b.pdf

Infrared Receiver VS1838B_1-1000x750
Infrared Receiver VS1838B_1-1000x7501000×750 57.5 KB

Thank you in advance.

2

IR receivers are made to demodulate the IR signal. They will respond to only a narrow band of frequencies near the frequency that they are made for. The VS1838 is made for 38KHz. They are not useful to measure frequency or signal strength.

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3

No.
That's a remote control receiver.

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5

thank you so much :smile:, I think I was wasting my time trying to do the impossible :sweat_smile: :joy: , although, you think there is a way or another type of sensor or maybe using a photodiode to apply this experience (measuring the wavelength of a transmitter/LED)?

6

so it's just not possible, alright :sweat_smile:, thank you so much :smile:
Do you think there is a way or another type of sensor or maybe using a photodiode to apply this experience (measuring the wavelength of a transmitter/LED)?

7

You'd have to look into spectroscopy.

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8

To measure wavelength you need to first have a sensor that responds to that wavelength, and second, a way to sort out incoming wavelengths.

Diffraction gratings, diffraction mirrors and optical filters will do the wavelength sorting for you.

9

An IR photodiode or phototransistor can be used to measure frequency and wavelength can be calculated from frequency.

Maybe this page will help.

More with a search for "Arduino measure IR frequency".

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