NCD5500 — NCD Engineering CAD package (2026-10-31T15:13:15)

NCD5500_CAD_package.pdf   5 sheets: outline & side view, mounting holes, connector openings, 1:1 drill template, wiring diagram (terminal tags as on ncd.io)
NCD5500_outline.dxf        board outline (OUTLINE), hole circles (HOLES), connector openings (CONNECTORS) — millimetres, datum = lower-left corner
NCD5500.step / .glb        3D model (STEP for CAD, GLB for web)
                           STEP origin = the drawing datum: X,Y at the lower-left corner of the board outline, Z = 0 at the PCB bottom surface (top at +1.60 mm)
NCD5500.dims.json          the dimension data behind the drawings (mm from the datum)

Drill template: print the PDF's last page at 100% / actual size (not 'fit to page') and check the 50 mm and 1 inch bars.
Board 36.70 x 24.90 mm, overall height 23.02 mm (above board 15.33, below 6.08), PCB 1.60 mm.
