Perforated Prototyping Board 90×90×3 mm + Corner/Cross/Hex Connectors (Parametric OpenSCAD files included)

This compact perforated board is sized 90 × 90 × ~3 mm with a dense, symmetric hole grid—handy for zip-ties, M2–M3 fasteners, and wire routing. It’s sturdy enough for small brackets and mock-ups, yet quick to print.

Also included: four small connectors to expand a single board into larger structures:

2-side (90° corner) – join two boards at a right angle

4-side (cross) – make “+” junctions in a grid

6-side (hub) – create hex/radial nodes

Suggested uses

Electronics jigs & sensor test plates

Cable management / tie-down points

Small robots, IoT mockups, STEM projects

Modular shelves, light panels, or display tiles

Printing & handling notes

Print the board flat.

For large batches, print one connector + one board corner first to confirm fit, then scale production.

Print Settings

Material: PLA, PETG, ASA (your choice)

Nozzle: 0.4 mm (0.6 mm works for stronger, faster boards)

Layer height: 0.20 mm (0.28 mm OK)

Perimeters/Walls: 3–4

Top/Bottom: 4–5 layers

Infill: 20–35 % (Gyroid or Grid)

Supports: As needed for your slicer/profile

Adhesion: Brim optional if your bed has corner lift

Fit tips (if using the connectors)

Too tight → add +0.05 mm Horizontal Expansion or scale X/Y +0.2–0.3 %.

Too loose → −0.05 mm or −0.2–0.3 % X/Y. A light deburr of slot mouths helps.

Parametric OpenSCAD

In board.scad: cube_width = 90; cube_height = 3; cube_depth = 90; hole_diameter = 3; hole_spacing = 5; cylinder_radius = 5.3*0.5; star_connector_gap = 3.

In connector_6_sides.scad, change hole_count from 6 to 4 to get the 4-side connector.