Gate

Gates are devices which attach basic electrical logic onto BuildCraft Transport Pipes, Fluid Pipes and Kinesis Pipes.

Gates come in several versions; the Basic, Iron, Gold, Diamond, Emerald and the Quartz Gate, which have (except the Basic Gate) an AND and OR variant on it, which have increasingly more options. Detailed information, features and usage of each variant can be found in the article of the respective gate.

The difference between the AND and the OR gates is when it will trigger an action. Both will trigger if one condition is true, but if an AND gate is used, and two or more conditions are set to trigger the same action, the action will only trigger when both conditions are true (If this AND is true). If an OR gate got two or more conditions set to the same action, the action will trigger when either of the conditions are true (If this OR is true).

When placing a gate on a pipe by a block with an inventory, a liquid buffer or an energy buffer, the gate will show conditions according to the block. An example would be to place it by a chest, and you would get inventory related conditions (Inventory empty, space in inventory, etc.). Some blocks or mods have their own conditions, like the Apiary and IC2 machines. All conditions are described in the respective article of the gate.

Gates can send a signal along a pipe using Pipe Wire. To transfer a signal from a pipe that does not connect to another pipe (Waterproof to Transport), it is possible to use Cobblestone Structure Pipe. In the following table is shown the ability of all gate types to interact with Pipe Wire:

Recipe
The player can choose the desired mode (AND or OR) if he has placed all needed resources in the Assembly Table, and the choosen one is produced.

Usage
All Gates can be placed on all types and sides of the BuildCraft pipes with a right-click. By holding the crouch-key and right-clicking the gate can be removed without to destroy the pipe.

Note: The basic function is that the gate checks the precondition in the right slot, and, if this precondition is true, executes the option in the left slot. The bar between the left and right slot light up red when the precondition is currently True.

With a right-click the player can open the GUI, which has dependent on the gate a different amount of slots. These slots can be configurated by clicking in it. The possible options depends on the pipe where the gate was mounted. The options which are available at all gates are listed in the tables below with a brief description:
 * Selectable options independent of the pipe (goto)
 * Additional options for extraction (wooden) pipes (goto)
 * Additional options for pipes they are connected to enegy or item consumer (machines), chests, tanks and so on (goto)
 * Additional options only available for special pipes (goto)
 * Furthermore all gates have the ability to interact with Red Pipe Wire to transmit and/or receive redstone signals over the BuildCraft own wire system. An example with a Diamond AND Gate is shown in the picture, but it is the same except that not all Gates can interact with the all types of Pipe Wire (listet in the table above). In the GUI the corresponding option is selectable if a pipe wire is connected to the Gate (goto)

General options for all pipes and gates
Following gate options are available on all pipes of the respective type (kinesis, fluid, transport):

Additional options for extraction pipes and all gates
Following gate options are additional available on the extraction pipe of the respective type (kinesis, fluid, transport):

Additional options for consumer, chests and tanks and all gates
Following gate options are additional available for pipe of the respective type (kinesis, fluid, transport), if they are connected to a consumer or storage:

Additional options for special pipes and all gates
Following gate options are additional available for specific pipes:

Additional options for pipe wire interaction and all gates
Following options are additional available for all types (kinesis, fluid, transport) if Pipe Wire is connected to the gate:

BC 6.1.1 and below
OR gates and AND gates can be converted in the Crafting Table.