ObsidiPlates Mod 1.7.10, 1.7.2 providing pressure plates that can only be activated by either players or NPCs, depending on what they're made of.

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.