Author Topic: Need code-learning photodiode that works in visible range  (Read 685 times)

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Offline mirthmuffinTopic starter

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Need code-learning photodiode that works in visible range
« on: June 20, 2023, 05:22:29 am »
Vishay makes IR receivers that output the carrier signal. I need a similar unit that works at optical wavelength. Is there anything out there that might do it? 

TSMP96000 looks like it might have an IR filter I may be able to remove. It seems like maybe I've heard of people doing this. Is there a good way?

[Update. VSOP98260 does this but is EOL. Vishay says IR filters on SMP96000 can't be removed without destroying the unit.]
« Last Edit: June 22, 2023, 08:22:16 pm by mirthmuffin »
 

Offline Someone

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Offline Infraviolet

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Re: Need code-learning photodiode that works in visible range
« Reply #2 on: June 20, 2023, 06:06:51 pm »
What speed of carrier signal? If it is at the 38KHz or so that typical I remotes use then you could build your own op amp based amplifier to go behind a visible wavelength photodiode/phototransistor.

Or, you might look it to whether you can get hold of material, in the right form factor, which can fluoresce in IR when excited by optical wavelengths. That sort of stuff exists for turning UV in to visible wavelengths, like on the coverings of tube lights, I'm pretty sure there could be a visible to IR version, but it might be pricey or hard to find. Then you could just turn the visible signal in to IR to feed to a typical remote coontrol style detector.
 

Offline mirthmuffinTopic starter

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Re: Need code-learning photodiode that works in visible range
« Reply #3 on: June 22, 2023, 08:18:51 pm »
Not quite. I also need the bandpass filter. I found the VSOP98260, but its's EOL...
 

Offline mirthmuffinTopic starter

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Re: Need code-learning photodiode that works in visible range
« Reply #4 on: June 22, 2023, 08:20:40 pm »
Its in 25khz to 60khz...I'm looking for a part that lets me avoid building my own analog RX. Per above, I did find a part but it EOL.
 


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