Target

A target is a block that provides a temporary redstone charge when hit by a projectile. It is also preferentially "targeted" by redstone dust, making it a common circuitry component.

Breaking
Targets can be mined using any tool or by hand, but a hoe is the fastest way to break it.

Usage
Targets emit a redstone signal when hit by most projectiles. This includes arrows, tridents, eggs, snowballs, splash potions, fire charges fired by a dispenser, firework rockets, lingering potions, bottles o' enchanting, ender pearls, and llama spit. The closer a projectile is to the center of the block, the stronger the redstone signal that is produced.

Redstone component
When struck by most projectiles, the target emits redstone power for 4 redstone ticks (0.4 seconds). Arrows and tridents instead cause the target to emit power for 10 redstone ticks (1 second), similar to stone buttons. A target can be hit with any of the projectiles mentioned above.

The strength of the signal depends on how close the projectile is to the center of the block, from 1 to 15.

The target also provides a block update when hit, meaning that an observer can detect if the target has been hit and has produced a redstone signal.

When used as part of a redstone circuit, targets has the unique property of being a opaque block that is not a mechanism component but still can redirect nearby redstone dust. Also, a target can redirect a redstone signal powering adjacent blocks, but only when the target itself is powered.

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