Ender Crafting is crafting using the power of waiting. An Ender Crafting setup consists of an Ender Crafter and Ender Alternators. The crafter will take energy from the void via the alternators. The more alternators you have, the faster it will craft.
Ender Alternators can be placed anywhere around the Ender Crafter in a 3 block radius. Even above or below!