How does this compare to Les' RPI photospectrometer?
https://www.hackster.io/news/les-wright-s-diy-raspberry-pi-s...
Does it just have a much larger spectrum?
DIY High Resolution Spectrometer (2018)
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Re: DIY High Resolution Spectrometer (2018)
#32Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
As mentioned below, the main problem is the detector. Most detectors are Si CCD. meaning the Si is fundamentally limited to 1100nm due to bandgap. Going beyond that means you need a different material such as InGaAs or Ge, unfortunately CCDs are not as common or are expensive for these materials. Which then gives you two choices: - an array detector, which is pricey. - a single detector such as a photodiode behind a…
"Photodiode behind a second slit": Thanks for the link. This is looks like a practical way to go, and in price range.
Re: DIY High Resolution Spectrometer (2018)
#33I've been wanting a cheap, no-cloud raman spectrometer in my pocket for a while now. Like something that can plug into something as universal as an audio jack on a phone, reflecting the laser back into its built in camera. I know there was some options out there that were cloud-based but I want one simply lets us interpret the samples and their readings ourselves with lab device quality output. DIY stuff like this is…
I don't think smartphone manufacturers are incentivized to put better, cooler sensors into them; unless those sensors can be used to better spy on you, which I don't think a spectrometer can be.
Ever hear of drugs before?
Re: DIY High Resolution Spectrometer (2018)
#34... and soon a small x-ray spectrometer? (even though this is illegal in most countries since x-rays are really dangerous).
It's easy enough to generate x-rays, for better or worse, but the devil's in the details. The x-rays apparently need to be monochromatic, or nearly so, so you can't just apply HV to any old random radio tube that's lying around. And then you need a beryllium exit window on the tube and another one at the detector entrance.
Fascinating teardown on one of these things at Ben Krasnow's channel https://www.youtube.com/watch?v=KdfHVcU8U7U .