Here is the currently updated BOM (99%) finished for the Raman spectrometer project, there are 2 MCU's powering the unit;

• Mega 2560 R3 controls the Triple turret diffraction grating system (stepper MTR control)
• Atmega 1284P drives the CCD detector
• LCD front panel interface
• 4 button sure control

Highlights:

• Raman spectrometer for under 1K
• 65 percent 3D printed (POM or user preference)
• Field portable
• 12vdc power supply (1.5A)
• Turret mount can accommodate 3 holographic diffraction gratings
• Front panel indicator LED's
• under panel mount for Mega 2560 R3 MCU

The PCB's I get are manufactured from PCBway.com, which only cost me 5.00US for 5 boards, downside is...unless U live in China the shipping cost 27.00 :( still not too bad of a deal, the boards I have received so far have been very good and their turn around is pretty fast.