So, a little more progress with getting spectra to the raspi...  I ditched the oscilloscope for this round... And here's some examples of actual data from the CCD transferred from the microcontroller through serial (to a PC for now...but it's written in Python and should port over to the raspi with no changes except the serial port hopefully)...  I'll test this on the raspi soon..

So, here's what matplotlib plots out from the serial data sent from the imagingBoard....

Here's the red filter...

Orange..

Yellow..

Brown..

Green..

Blue....

Purple...

And purple sharpie for fun.. I saved this one at a different resolution sorry... ¯\_(ツ)_/¯

So.. the python code is up on gitHub...  as is the code for the nucleo or you can look at the nucleo code on the mBed repo..  

I'm just about finishing up this round of testing... and will be ready to move to the next phase soon....  Which will be finalizing the design for the printable spectrometer...  I have been experimenting with locations and angles to place the light baffles, etc...  and those will be included in the final design.. probably in more places than just the spectrometer..  During some previous tests I noticed a few hotspots for stray light around the beam splitter and the objective lens... So I will probably be paying attention to those areas and maybe others as well.  I'll be experimenting with different methods..  When printing alot of these objects, and using the supports for overhangs...it occurred to me that the printer can do some interesting things with the plastic..  I might look into creating a surface on the inside that inhibits reflections, etc..  I don't know yet, but I'll be looking into it..!