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Tripwire Hook

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Tripwire Hook
Tripwire Hook.gif
Tripwire Hook
Type

Non-solid block

Physics

No

Transparency

Yes

Luminance

No

Blast resistance

2.5

Tool

Any tool

Renewable

Yes

Stackable

Yes (64)

Flammable

No

Availability

?

First appearance

12w22a

Drops

Itself

Data value

dec: 131 hex: 83 bin: 10000011

Name

tripwire_hook

A tripwire hook is a type of switch that can be placed at opposite ends of each other, connected by tripwire, for entities to activate. They are activated by most entities colliding with the tripwire that connects two tripwire hooks together (e.g. players, dropped items, some fired arrows and most mobs). However, thrown potions, some arrows, thrown Ender pearls, and thrown eyes of Ender do not activate tripwire hooks. Destroying the tripwire while not holding shears triggers a short redstone pulse.

Contents

[edit] Crafting

Ingredients Crafting recipe

Iron Ingot +
Stick +
Any Wood Planks


Iron Ingot
Grid layout Arrow (small).png Tripwire Hook2

Stick

Oak Wood PlanksSpruce Wood PlanksBirch Wood PlanksJungle Wood PlanksAcacia Wood PlanksDark Oak Wood Planks

[edit] As a crafting ingredient

Name Ingredients Crafting recipe

Trapped Chest

Tripwire Hook +
Chest




Grid layout Arrow (small).png Trapped Chest
Tripwire Hook Chest



[edit] Usage

The player first attaches hooks across from each other, at most 40 blocks apart. Then the player must place string across the gap between them. Once every block in between these hooks has had string placed the hooks will lower (does not require string on the block beneath each tripwire). At this point, walking on or destroying the string (without shears) will cause redstone current from both hooks. The string must lie in a straight line between the two hooks, or else it will not activate when an entity collides with it. The pulse generated from the tripwire hook when activated can activate all redstone objects for a short time such as dispensers, often filled with arrows, or note blocks.

The tripwire will send a pulse of powered redstone, similar to pressing a button or standing on a pressure plate.

A mob or player of a great enough height to be partly inside a block will trigger the wire in that block, therefore they can also trigger a tripwire while sitting inside a minecart, with the tripwire being placed one block above the track. The string cannot be placed in the same block as the track. This can be utilized in conjunction with detector rails to detect if a passing cart has a player in it, assuming there are no mobs riding. This greatly simplifies previous methods for doing this, and allows for easy cart-return mechanisms to prevent empty carts travelling around a minecart system.

The same can also be done with tripwires of varying heights and a pressure plate to detect something walking under them, thus allowing detection of the height of any mob (to the nearest block) walking through a doorway.

[edit] Video


[edit] History

On May 28, 2012, Dinnerbone began tweeting of a new idea he had. He began posting pictures and eventually released a video on tripwires. Before this, the player could not place string on the ground. Dinnerbone credited the idea to his fiancee MissMarzenia.[1]

Official release
1.3.1 12w22a Added tripwire hooks.
1.5 13w01a Tripwire Hooks are used to craft Trapped Chests.
1.7.2 13w36a Tripwire Hooks can be obtained as one of the "junk" items by fishing.
Upcoming
1.8 14w11a The model was slightly changed.

[edit] Issues

Issues relating to "Tripwire" are maintained on the issue tracker. Report issues there.

[edit] Trivia

  • Tripwire hooks, as well as the tripwire, can be "washed away" by water. If the tripwire is washed away first, the trap will act as if it was broken normally, without shears, and sends a charge before becoming inactive.
  • In terms of Redstone commuting, Tripwires behave just like Levers. This means that the block the Tripwire Hook is attached to will become a "Redstone block", which means the block will commute currents to any receivers (TNT, Redstone Wire, Redstone Lamp, Etc.) For example, for TNT to be activated via Trip system, the TNT must be placed on any side, above, or below the block a tripwire hook is latched to. This is a very nice way to install TNT traps.
  • Cutting tripwire with shears will not cause a tripwire hook to produce a redstone current, but it will cause its state to change which can be detected with a BUD switch.
  • Standing next to the wall the Tripwire Hook is on will not produce a signal while crossing the tripwire

[edit] Gallery

[edit] References

  1. a b