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leswright1977 / PySpectrometer

Raspberry Pi Spectrometer
Apache License 2.0
650 stars 104 forks source link

Cheap Spectrometer version #12

Open kirbah opened 3 years ago

kirbah commented 3 years ago

Any suggestion if it is possible to use some cheaper version of Diffraction Spectroscope? Here are few samples https://www.amazon.com/Handheld-Durable-Small-Diffraction-Spectroscope/dp/B00MNEAMF4 https://www.amazon.com/Gain-Express-Diffraction-Spectroscope-Identification/dp/B017VM4Q86

The only obvious issue - there are no details regarding diffraction grating of lines/mm. Aliexpress price for them are around $25 - https://www.aliexpress.com/item/32625200308.html

Instead of RPI + camera it should be possible to use $5 USB webcam and attach it directly to PC https://www.aliexpress.com/item/1005001465072245.html Another $5 USD for the lens with zoom https://www.aliexpress.com/item/4000617323132.html

I am looking for some cheap spectrometer version and initially found webcam + dvd piece + wood box version https://www.youtube.com/watch?v=MgogwcXUIoc&t=131s I really like PySpectrometer since it looks great. Now I am trying to make a really cheap version but with reasonable quality.

sctv commented 2 years ago

Hi @kirbah , publiclab has lots of resources on cheaper builds https://publiclab.org/wiki/spectrometry, extract a diffraction grating from a cut up dvd. Not sure of the resolution. Cheers, Brian