Actuator

The Actuator is a mechanism item purchased from the Mechanic for each, or harvested from sand, lava, or Dead Man's Chest traps. It has to be connected with wiring to function. When activated, the tile it is on toggles between active and inactive state, effectively allowing any block to be toggled like active or inactive stone blocks. Like wire, Actuators are normally invisible and only become visible when a mechanism item is selected.

The following items interact with Actuators:
 * They can be removed with the Wire Cutter or.
 * The Presserator automatically places Actuators on objects when placing them, if the player has any.
 * The Actuation Rod can toggle any Actuator within a limited range without requiring wire.

Tips

 * Using Actuators in place of doors creates entrances that can completely block off the enemies from a Blood Moon or other events.
 * It is also possible to make an airlock-type double door system using 6 Actuators and activating only one side inactive/active. This, combined with a trigger of your choice, will allow access for players only while keeping a house. You still need a door or some platforms for housing purposes, but this style of door can be put on outer NPC housing directly to conserve any expensive materials your house is made of.
 * Because they work on traps, it is possible to load up several traps in a row, and none of their attacks will be blocked by traps ahead.
 * Actuators can be used to pass through Hellstone in the Underworld without generating lava, and can similarly be used to pass through hive blocks without generating honey or spawning bees. The Actuation Rod may be used to quickly activate placed Actuators.
 * If you stand inside an inactive block and it becomes active, you will be able to move inside the 6 blocks you are in but will be stopped by other blocks. This may be used for protection.
 * Like naturally-generated wires, naturally-generated Actuators can be harvested, though they appear much more rarely, saving per Actuator.
 * Actuators are a good tool for terraforming/clearing the way for a plot, especially underground.

Trivia

 * The Multicolor Wrench is not capable of removing Actuators, even though it is crafted using the Wire Cutter, which does remove Actuators.
 * However, the Grand Design, crafted from the Multicolor wrench, is capable of doing so.