Great Ball Catalog

Semaphore

by XCLD

Semaphore

Back to Module List

Edit Module

Great Ball Catalog

Keep the balls rolling?

Analytics help us fix jams; embeds power videos. You can change your options anytime. Learn more.

Timing & Throughput (Analytics)

Helps us spot jams and improve the loop.

External Modules (Embeds)

Loads videos and third‑party media which may set cookies.

Utility modules (Essential) are always on to keep the site working.

Menu

Homepage
The GBC Standard
All Modules
Builders
Admin
Quick Add
GBC Videos
Resources
About

Great Ball Catalog is an independent, fan‑run site and is not associated with, sponsored, authorized, or endorsed by The LEGO Group. LEGO® and the LEGO logo, the Minifigure, and the brick and knob configurations are trademarks of the LEGO Group of companies. ©2025 The LEGO Group.

Get in touch

If you build GBC modules, join our Discord server and get in touch with other GBC builders just like you!

Great Ball Catalog Discord

Great Ball Catalog. Page Design: HTML5 UP. | Privacy

Keep the balls rolling? Analytics help us fix jams; embeds power videos. You can change your options anytime. Learn more.