I went ahead and merged the different parts temporarily. I still feel that at least the MCU is unfinished enough to warrant not doing the final merge, but this temporary merge lets us see where we are going:



The BOM total for one board is about 340EUR (a few components are still missing, but those should fit in that price limit). The board price at pcbcart is 27EUR per board plus 135EUR one-time costs with the following settings:

• Material: FR4
• Layers: 4 layer
• Material Details: Standard Tg 140C
• Board type: single unit
• Board Size (width): 135mm
• Board Size (height): 95mm
• Quantity: 5pcs
• Thickness (Finished Board): 1.2mm
• Layer Stack: As pcbcart default
• Layer Stack Details: -
• Impedance Control: No
• Surface Finish: Lead Free HASL - RoHS
• Outer Layer Copper Weight (Finished): 35um
• Inner Layer Copper Weight: 35um
• Min. Tracing/Spacing: 0.15mm
• Min. Annular Ring: 0.10mm
• Smallest Holes: 0.30mm
• Holes Number: Over 600
• Buried/Blind Vias: No
• Times of Buried/Blind Via: --
• Surface Mount: 2 sides
• Soldermask: Both Sides
• Peelable Soldermask: None
• Soldermask Color: Green
• Matt Color (only add to Green or Black): None
• Silkscreen Legend: 2 sides
• Silkscreen Legend Color: White
• Gold Fingers: Yes
• Gold Fingers Number: 240
• Gold Fingers Chamfer: 60°
• Slots in Board: No Slot in Board
• Slots quantity in board: -
• Testing: Yes
• UL Marking: Yes - as pcbcart default
• Date Code Marking: Yes - as pcbcart default
• Lead Time: in 18 days
• Special Requirement Note: -

So a full set of 5 prototypes is about 5x400EUR = 2000EUR.

PS: When doing the merge, I also found two small bugs in the PSU (not replaced the resistors, yet), so reuploaded that, too.