Button

A button is a non-solid block which can provide temporary redstone power.

Obtaining
Buttons can be crafted from stone or wood planks, and stone buttons can be found in strongholds.

Natural generation
Stone buttons are generated naturally in strongholds next to iron doors.

Usage
A button can be used as a temporary power source.

As a redstone component
A button is a monostable switch which deactivates shortly after being activated.

A button can be attached to the side of most opaque blocks. In, buttons can also be attached to the tops and bottoms of blocks.

A player can activate a stone or wooden button by right-clicking it, and a wooden button can also be activated by a fired arrow. A stone button stays activated for 1 second (10 redstone ticks), while a wooden button stays activated for 1.5 seconds (15 redstone ticks) or, if activated by a fired arrow, until the arrow despawns after one minute or is picked up.

While activated, a button and its attachment block both power any adjacent redstone dust (including beneath the button, or beneath or on top of the block), and any adjacent redstone comparator or redstone repeater facing away, to power level 15. They also activate any adjacent mechanism components (including above or below) such as pistons, redstone lamps, etc.

Mobs cannot activate buttons directly, but arrows fired by skeletons or dispensers can activate wooden buttons.

If a button's attachment block is removed, or if water flows into the button's space, the button will be destroyed and drop itself as an item. If lava flows into a button's space, it is destroyed without dropping itself as an item.

History
The pre-1.4.2 crafting recipe for the stone button required two stone blocks:

Issues
Knopf Botón Bouton Pulsante Button Stone Button/ko Knop Przycisk Кнопка 按钮