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4-bit calculator, can add or subtract 2 numbers between 1 and 15, this is my first build : r/redstone
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4 Bit Binary calculator - Addition and Subtraction - Decoder to Hard drive to 7 segment display Minecraft Map
GitHub - tachoknight/wiegand-calculator: An encode/decode calculator for Wiegand-based RFID tags and cards, written in Go and plpgsql
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