Spectrophotometer sensor

Projects General Guidance
1

Hello, everyone.
I am constructing a prototype model of a Spectrophotometer to measure the intensity of light absorbed by a specific solution. I want to ask about the type of the sensor I should use is it color sensor RGB or spectral sensor. And what about OPT4048 and OPT4060. Note that I need actual and nearly accurate numbers of light intensity. Also, in which old or discarded devices can I find these sensors to be able to use in my device ? Last one is can I use microcontroller from another old devices?

LM7805 where can I find this type of microcontroller in old devices?

2

Definitely a spectral sensor. An RGB sensor like OPT4048 and OPT4060 is useless to you.

LM7805 is not a microcontroller, it is a voltage regulator. It is very common. But also an old design. There are better replacements available.

3

Please specify the light wavelength range and number of bands in the analysis.

Consider the AS726x series of spectral sensors.

4

Still only a few channels. Will this be enough to perform spectroscopy?

I don't know if this would be a dumb idea, but what about an optical grating or prism moved by a servo motor? A fixed, wide-band sensor could be placed behind it.

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5

That depends on the OP's requirements, which have not been specified. Let's await those details.

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6

Vague indeed!

"Actual" light intensity as opposed to what? Relative light intensity? Can't you just calibrate your sensor against your light source with a sample of distilled water or something?

Spectrometers, I guess.

Almost certainly not.

7

Please give details of the "old and discarded" devices that you have found.

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