4 ms·

Got stuck at the NAND gate level.

• prologic 3mo ago
  Stick with it! Hint: A NAND gate is an AND + NOT circuit. It outputs a 0 when both inputs are a 1, otherwise outputs a 1.
• namero999 3mo ago
  Same, I built a correctly-working AND gate made only of NAND gates but the tests don't pass.
  • Kirby64 3mo ago
    The SR latch logic is also incorrect. Cross-coupled NORs had to be configured illogically to actually pass the tests and output correctly. Also, the later puzzles (starting with memory) don't have any real tests. Seems like it just doesn't really exist past that point.
    • asterisk_man 3mo ago
      What configuration did you use to pass the test? I guess I couldn't think illogically enough.
      • Kirby64 3mo ago
        I removed one of the cross coupled outputs (only one NOR was connected to the other, not both outputs cross coupled) and magically it worked. Didn’t make any sense from a logic perspective though.
• jpl56 3mo ago
  [dead]