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).

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.

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.

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.

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