Created on: 2025-11-08 ; Revised on: 2025-11-08

Customizable LEGO interface

Scripts for creating LEGO-compatible bricks with customizable top pins and bottom entries.

Available in two formats:

• Python script (create_brick.py) for Blender 3D
• OpenSCAD script (create_brick.scad) for OpenSCAD

Files are available on:

• GitHub: https://github.com/foilen/3d_printing/tree/master/lego-interface

Usage

Blender (Python)

1. Open Blender 3D
2. Open the Scripting workspace
3. Load create_brick.py
4. Edit the options at the top of the file
5. Run the script

OpenSCAD

1. Open OpenSCAD
2. Open create_brick.scad
3. Edit the options at the top of the file
4. Press F5 to preview or F6 to render
5. Export as STL for 3D printing

Options

Both scripts use the same variables:

• pinCount: Array [width, length] - How many top pins in each dimension
• entryZ: Height of the block - 2mm for plates or 8.2mm for normal brick size
• printTopPins: Set to true to add pins on top of the brick
• printBottomEntries: Set to true to add hollow entries underneath for connecting other bricks

Examples

2x6 brick (top and bottom)

Blender (Python):

pinCount = [2, 6]
entryZ = 8.2

printTopPins = True
printBottomEntries = True

OpenSCAD:

pinCount = [2, 6];
entryZ = 8.2;

printTopPins = true;
printBottomEntries = true;

10x10 plate (only top)

Blender (Python):

pinCount = [10, 10]
entryZ = 2

printTopPins = True
printBottomEntries = False

OpenSCAD:

pinCount = [10, 10];
entryZ = 2;

printTopPins = true;
printBottomEntries = false;

Applications

These scripts are particularly useful for:

• Creating interfaces between LEGO and custom structures
• Making non-standard size bricks
• Creating custom base plates
• Integrating LEGO elements into your 3D printing projects