That’s it! That’s all you need to understand about how the comparator works. But there’s one magic feature that I haven’t mentioned yet which takes this item from handy to invaluable – some blocks, when placed next to a comparator, will emit a signal strength depending on the state of that block.
Let’s take a few examples so you know what I mean. The most important is probably a container. We’ll use a chest, but this category includes dispensers, hoppers, furnaces and more. A comparator placed next to a chest will output a signal strength in proportion to how full it is –15 for full, 0 for empty, and all the levels in between. That could be useful for triggering a light, perhaps when your chests are getting full and need emptying.
It works for other blocks too. Make a cake, and plop a comparator down next to it. You’ll see that it’s outputting a strength of 14 from the front. Eat a slice and that goes down 2. Eat another and it goes down two more. You could build a system that sets off an alarm when someone else is eating it.
Or try putting a comparator next to a composter – it’ll output a signal strength depending on how full of compost it is. Pair with a hopper above it filled with organic materials, and you’ll be able to automatically fill up your composter when it empties.
A jukebox will output a signal strength indicating which music disc is playing. A beehive outputs a signal depending on how much honey is inside. A lectern will output a signal depending on which page the player is on in the book inside it, and an item frame outputs a signal depending on the rotation of the item inside.
There are many, many more combinations, and maybe you have ideas for a few? Experiment and send your best redstone comparator builds to scoops@minecraft.net with the subject line REDSTONE! We'd love to see some crazy inventions!
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