|Type of Block||Redstone|
|Data Values||Hex: JE: DA|
Dec: JE: 218
| Come on! Grow up!
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An Observer was a block exclusive to Minecraft: Pocket Edition, added as part of the 0.15.0 update, but it is now available under the latest Minecraft PC/Mac Edition, since the 16w03a snapshot. It is a Redstone-compatible block.
The observer has a small red dot on the back. The sides are similar to a Dispenser, but with a gray "belt" on them. The front is decorated with a stone face.
The observer has two sides: a detector side, and an output side. The output side will create a one-redstone-tick (two game ticks, or 0.1 seconds) if the block at the detector side is updated or changed. For a more elaborate demonstration, click here.
The observer can detect different stages of flowing water(the depth and position), it can detect grass or crop growing, and it can detect other observer blocks. This can be used to create cool lighting displays, vertical Redstone signal transporters and clocks. It does this by detecting the change in the target block's ID or data value.