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Discuss Minecraft's Redstone systems, including automation, circuits, components, and technical gameplay. Share ideas and feedback on Redstone mechanics across Minecraft. Because Java Edition and Bedrock Edition use different Redstone systems, some behaviors will differ between versions. Please tag your posts with Java, Bedrock, or Both where applicable.

3

"Filter" Redstone Component

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    Registered User commented
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    You can already do this with a comparator going out of a hopper which is filled so one more item will power a block with a Redstone torch on it which locks the hopper. I use it it most keycard doors.(not trying to be harsh, it rarely comes up in most instances though it is still possible)

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    Registered User commented
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    Look at the copper-hopper mod for a perfect example of how this could work.  The functionality of this mod is something that should be built into vanilla minecraft.  It would pair extremely well with the new autocrafter and other improvements in 1.21