Apr 2, 2026
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Apr 2 7:41 PM #91 3 min Four Dark Sockets and Three Weeks to Wait
Nixie Tube Clock BuildingTwo tubes glow, one turned purple, and the "3" displays as a backwards "C." That's not a clock.
code-a-day
Four Bits per Digit, No More, No Less
Binary-Coded Decimal (BCD) 🔗 Nixie Tube Clock BuildingNixie tube drivers speak BCD — a Cold War encoding that trades efficiency for human readability.