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  (paper "A5")

  (title_block
    (title "One verified 74HC595 output stage · 8 independent channels")
    (date "2026-08-27")
    (rev "B · electrically re-audited")
    (company "Kangwon National University Psychology Lab")
    (comment 1 "Reconstructed from source code, build photographs, and SN74HC595 datasheet")
    (comment 2 "No undocumented IDC pin-to-channel mapping has been invented")
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