Piston Gate

The Piston Gate is a gate that uses Pistons.

How it Works
When the Piston is powered by the secondary input, the block is moved up into position for the Redstone Repeater, allowing the main input to activate the upper output. When the block is strongly powered by the upper Redstone Repeater, the upper output of the gate is activated, allowing Redstone Wire to be powered by the Power Block.

How to Build
A Piston Gate requires a block of any Material and one Piston placed below the block. It also requires a Redstone Repeater to power the block in the upper location.