Redstone PCB
The Redstone PCB mod offers a standalone version of redstone circuit boards that were previously only available as part of the Better With Addons mod. They now function independently without requiring Better With Mods.
These special blocks affect the connection of redstone wires placed on their surface. You can change the connection pattern by simply right-clicking on the top face of the block.
In addition to their functionality, the boards have an attractive appearance, allowing you to use them as decorative elements in your builds.
From a canonical perspective, the abbreviation PCB stands for Popular Carved Block.