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.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: three 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.Print Settings

Parametric OpenSCAD

In board.scad:

cube_width = 90;         // Width of the cube
cube_height = 3;       // Height of the cube
cube_depth = 90;        // Depth of the cube
hole_diameter = 3;      // Diameter of the holes
hole_spacing = 5;       // Spacing between the centers of the holes
cylinder_radius = 5.3*0.5;  // Radius of the cylinders
star_connector_gap = 3;

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

base_radius = 30/2.5;       // Radius of the base disk
height = 5;             // Thickness
hole_diameter = base_radius*0.45;      // Each hole's diameter
hole_count = 6;         // Total number of holes
box_side = 3;// Height of the board