Mechanisms are items that can be activated or activate other mechanisms that are connected to them with wire.
|Wire||Connects mechanisms. Can be placed anywhere as long as another wire of the same color is not already present. Can even be placed in mid-air without support. Currently four different colors: Red, Green, Yellow and Blue. Removed with Wire Cutters.|
|Switch||Triggers activation upon right-clicking. Can be placed anywhere a torch can be placed.|
|Lever||Triggers activation upon right-clicking. Can be placed on the floor and on background walls|
|Pressure Plate||Triggers activation when touched; different colored plates are activated by different combinations of the player, NPCs and enemies. Can be placed on the floor like furniture, and becomes partially hidden when placed.|
|Weighted Pressure Plate||Triggers activation by player when stepping on or off it. Being practically the only trigger in Terraria that creates a pulse. Can be placed on the floor like furniture.|
|Pressure Pad||Triggers activation when touched by projectiles or Pets. Can be placed on the floor, ceiling, or side wall but not on platforms.|
|Pressure Plate Track||Triggers activation when a Minecart rides over it.|
|Timers||Once activated, they will keep sending activation signals through the wire they are connected to.|
|Detonator||Triggers activation when touched or right clicked, similar to pressure plates. Found in explosive traps underground.|
|Gem Lock||Once the Large Gem of the Gem Lock has been placed inside, the Gem Lock will trigger activation.|
|Trapped Chest||When it is opened, it triggers activation.|
|Light sources||Once activated, they will switch between their 'lit' and 'unlit' states.|
|Doors||Once activated, they will switch between their 'open' and 'closed' states.|
|Trap Doors||Once activated, they will switch between their 'open' and 'closed' states.|
|Tall Gates||Once activated, they will switch between their 'open' and 'closed' states.|
|Pumps||Liquid will be pumped from inlet to outlet once per activation.|
|Toggle-able Blocks||Once activated, they will switch between their 'active' and 'inactive' versions. The inactive version will let things pass through them like furniture.|
|Actuators||Like Toggle-able Blocks, but works with almost any block it's placed on.|
|Dart Traps||Will shoot poisoned darts once per activation, with a cooldown of three seconds.|
|Super Dart Trap||A stronger version of the Dart Trap.|
|Spear Trap||On activation, shoots out a spear that deals a lot of damage.|
|Spiky Ball Trap||Drops several spiky balls when activated.|
|Flame Trap||Shoots out a jet of flame when activated.|
|Geyser||Shoots flame for a maximum of about 20 blocks.|
|Explosives||Once activated, they will detonate instantly.|
|Cannon||Depending on where the wire is connected, either shoots a cannonball or rotates toward the side the wire is on.|
|Bunny Cannon||Depending on where the wire is connected, either shoots an exploding bunny or rotates toward the side the wire is on.|
|Music Boxes||Once activated, they will play recorded soundtracks.|
|Statues (some)||There are 41 statues that function as mechanisms. The other 67 statues are not. Statue mechanisms can spawn a variety of items, creatures, or teleport NPCs.|
|Chimney||The chimney has three states it rotates through: Off and On, and a third state that adds smoke particles.|
|Teleporter||When activated, teleports the player and/or any NPCs currently standing/walking over it to another Teleporter connected by wire.|
|Gemspark Block||Will toggle "lit" and "unlit" states when activated.|
|Firework Rockets||Activated through Wire or by right-clicking. Creates pretty fireworks and damages mobs in the explosion. Consumed on use.|
|Firework Fountain||Activated through Wire or by right-clicking. Creates pretty fireworks.|
|Fireworks Box||Activated through Wire or by right-clicking. Creates pretty fireworks. Does not damage mobs.|
|Confetti Cannon||Depending on where the wire is connected, either launches confetti or rotates toward the side the wire is on. Does not damage mobs.|
|Bubble Machine||Can be toggled on or off. Creates bubbles.|
|Silly Balloon Machine||Can be toggled on or off. Creates balloons.|
|Water Fountains||Activated through Wire or by right-clicking. Changes the water color nearby to that of the fountain's biome.|
|Monoliths||Activated through Wire or by right-clicking. Changes the background to that of the corresponding pillar.|
|Party Center||Activated through Wire or by right-clicking. Can be toggled off, but will turn itself off at 7:30pm. All party centers in the world are activated/deactivated by triggering one.|
|Land Mine||Activated when a character or monster walks onto it or when activated by Wire, dealing damage and removing it.|
|Campfires||Activated through Wire or by right-clicking.|
|Portal Gun Station||Depending on where the wire is connected, either shoots a portal, swaps portal colors, or rotates toward the side the wire is on.|
|Announcement Box||Announces (in the chat) what was written on the sign when powered.|
|Junction Box||Allows wires of the same color to cross without connecting. Can be hammered.|
|Logic Gate Lamp|
- 1.3.2：Party Center and Silly Balloon Machine introduced.
- Gem Locks, Trapped Chests, Portal Gun Station, Announcement Box, Junction Box, Geyser, Logic Gates, and Logic Gate Lamps introduced.
- Cannon, Confetti Cannon, and Bunny Cannon can now be wired.
- Trap Doors, Tall Gates, Monoliths, Confetti Cannon, Chimney, and Detonator introduced.
- Two new Pressure Plates are added: the Weighted Pressure Plate and Teal Pressure Plate
- 184.108.40.206：Fixed the bug where the wiring system was not activating Doors, Music Boxes and Fountains properly.
- Fireworks now show the wiring layout when selected.
- Fireworks Box and Pressure Plate Tracks introduced.
- Wiring system runs at least three times faster.
- Longer wire systems get larger gains.
- Fixed a bug where only one wire attached to a Lever would work when you flipped it.
- Gemspark Blocks were added and can be toggled.
- Added infinite wiring support across the map.
- New traps are introduced: Flame Traps, Super Dart Traps, Spear Traps, and Spiky Ball Traps.
- Actuators, Teleporters, Water Fountains, Land Mine, Bubble Machine, Firework Rocket, Firework Fountain, Cannon, and Bunny Cannon introduced.
- Pressure Plates now have different triggering conditions based upon their color.