EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: akgsh on March 22, 2022, 10:55:36 pm
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Hi,
I am looking somebody who can help to work on a project on light sensor. My application is to detect light emitted from various surfaces under various types of laser excitation.When a low power IR laser hit the surface the surface emits colors from a material that was coated on the surface.The emitted colors are R,G,B and their combinations.In most of the cases the emitted light is very strong.The emitted light has to be detected by the light sensor and if the sensor detect the correct color it should show a GREEN LED button on the device.If no light then a RED led blink.The device has to the pocket type.If it was successfully done,then I need hundreds of pieces for various color detection.
Those who are interested, please contact.
Thanks
Kumar
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A color sensor, just $12.75: https://core-electronics.com.au/tcs3200-color-sensor.html
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They are old new stock- this chip was discontinued some years ago- as far as I know there is no second source or replacement part.
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https://www.adafruit.com/product/1334 (https://www.adafruit.com/product/1334)
https://learn.adafruit.com/adafruit-color-sensors (https://learn.adafruit.com/adafruit-color-sensors)
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Didn't know IR could be converted up in energy to visual band.
Where is the energy comes from , photon-phonon interaction?
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Didn't know IR could be converted up in energy to visual band.
Where is the energy comes from , photon-phonon interaction?
https://maxmax.com/phosphorsdyesandinks/infrared-phosphors-dyes-and-inks/infrared-up-conversion-powder (https://maxmax.com/phosphorsdyesandinks/infrared-phosphors-dyes-and-inks/infrared-up-conversion-powder)
https://www.phosphor-technology.com/ir-uv-phosphors/ (https://www.phosphor-technology.com/ir-uv-phosphors/)
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Didn't know IR could be converted up in energy to visual band.
Where is the energy comes from , photon-phonon interaction?
https://maxmax.com/phosphorsdyesandinks/infrared-phosphors-dyes-and-inks/infrared-up-conversion-powder (https://maxmax.com/phosphorsdyesandinks/infrared-phosphors-dyes-and-inks/infrared-up-conversion-powder)
https://www.phosphor-technology.com/ir-uv-phosphors/ (https://www.phosphor-technology.com/ir-uv-phosphors/)
Could be. If it works, than no needs to determine a color, since it;s already known wavelength, just detect presence.
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They are old new stock- this chip was discontinued some years ago- as far as I know there is no second source or replacement part.
There are lots of pin-incompatible options: https://ams.com/en/color-sensors
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A bit confused by your need for hundreds of parts for various color detection. These chips output an RGB value. You process that data to decide if that is close enough to the color you are looking for. I can't see where it would make sense to sequentially expose a sample to hundreds of chips with dedicated logic assigned to a color each. And it would be difficult to arrange viewing geometry so all of these hundreds of chips could simultaneously view hundreds of samples and even more difficult to sort out which output corresponded to which sample.
If hundreds is merely to projected quantity of handheld sensors needed it makes sense. Just means you need to think about the interface to set the color and tolerance.