GBC Module Catalog
The most comprehensive listing of Great Ball Contraption modules
Recently Updated Modules
Ballkirk Wheel
The Ballkirk Wheel is a GBC based on the Falkirk Wheel ship lift near Falkirk, Scotland.
One Cross Each
This is the fully GBCcompliant version of LBricks (/builder/lbricks/) GBC 48723 (/module/1137/) module
GBC 48723
This module is only compliant with the GBC standard is elevated entirely. As built, it does not output above 10 bricks...
GBC Gumball Machine
A reservoir module themed as a gum ball machine. Additionally the output speed can be adjusted from 0 to 60 bps. Ball...
Great Ball Counter
A counter made of 7segmentdisplays that is easy to ready. Additionally it features a gauge showing the current ball...
Flex Tube Screw
Two Tread Type Conveyor
This module uses two different types of conveyor belt pieces to transport balls at different angles.
Brick Mill
This module is constructed entirely from elements available in the 1980s.
Tread Lifter
Semaphore
The Ring
About the Great Ball Catalog
Great Ball Contraptions (GBC) modules are custom-built LEGO machines that transport small LEGO balls through creative mechanisms.
This catalog is the world’s most comprehensive resource for GBC modules, featuring hundreds of modules from dozens of builders, a lot of them with build instructions. Whether you’re a seasoned builder or just discovering the hobby, you’ll find hundreds of unique designs to explore and build.
Start browsing to discover the amazing variety and ingenuity of the global GBC community.