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Re:DIY High Resolution Spectrometer (2018) by bradrn on Sunday May 15, 2022 @10:13PM (#31393131)
A lower resolution but easier-to-construct variant: http://scheeline.scs.illinois.edu/~asweb/CPS/
Re:DIY High Resolution Spectrometer (2018) by whatshisface on Monday May 16, 2022 @01:33AM (#31393911)
Without an enclosure to get rid of ambient light, you are not likely to get a lot of useful data out of that.