ObsidiPlates is a mod, by Myrathi, providing pressure plates that can only be activated by either players or NPCs, depending on what they're made of.
Originally created as a surprise for Jadedcat, it implements (using original code) a concept she missed from Better Than Wolves (which is why the primary plates uses obsidian, specifically).
v3.0.0 build 18 is a straight 1.7.10 port of build 13.
v2.0.0 build 15 is a straight 1.6.2 port of build 13.
As of v1.5.0 build 13, Silent and Shrouded Plates can be smelted, in a furnace, to remove the extra properties, returning a basic Obsidian or Mossy Pressure Plate.
As of v1.3.2 build 11, Myrathi added five (5) more plates:
Earlier versions of ObsidiPlates only had the single Obsidian Pressure Plate available.
All plates are a type of switch that can be placed onto the surface of a block. If connected, by wire, to an object (or placed adjacent to a block that can be powered), it will provide power to that object or block when stepped on by a player (or NPC, if a Mossy Pressure Plate) and will stop when stepped off.
As opposed to wooden and stone pressure plates, Obsidian Pressure Plates will not respond to items or NPCs and Mossy Cobblestone Plates will not respond to items or players.
Silent versions of these plates make no sound.
Shrouded versions of these plates are see-through.
Silent Shrouded plates can only be be crafted as silent first then adding shrouded last.
See the FTB wiki page.
You can find a list in my Mod Compendium on the FTB forum or on my CurseForge profile.
