mod 10 down counter using 74191 - Copy

Ravindra
Ravindra Bhegade
• Created on Aug 19, 2026 • 0 • 0 • 2
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mod 10 down counter using 74191 - Copy
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Integrated Circuits Used

74HC191 74LS20

Procedure

  1. Add IC 74HC191 into ICBase-1 (74HC191).
  2. Add IC 74LS20 into ICBase-2 (74LS20).
  3. Connect Pin-20 (VCC) of ICBase-1 (74HC191) to VCC Port.
  4. Connect Pin-8 (Ground) of ICBase-1 (74HC191) to GND Port.
  5. Connect Pin-4 (Input) of ICBase-1 (74HC191) to GND Port.
  6. Connect Pin-18 (Input) of ICBase-1 (74HC191) to Clock port of 1Hz frequency.
  7. Connect Pin-5 (Input) of ICBase-1 (74HC191) to VCC Port.
  8. Connect Pin-13 (Input) of ICBase-1 (74HC191) to VCC Port.
  9. Connect Pin-19 (Input) of ICBase-1 (74HC191) to VCC Port.
  10. Connect Pin-1 (Input) of ICBase-1 (74HC191) to GND Port.
  11. Connect Pin-14 (Input) of ICBase-1 (74HC191) to GND Port.
  12. Connect Pin-3 (Output) of ICBase-1 (74HC191) to Output-0.
  13. Connect Pin-2 (Output) of ICBase-1 (74HC191) to Output-1.
  14. Connect Pin-6 (Output) of ICBase-1 (74HC191) to Output-2.
  15. Connect Pin-7 (Output) of ICBase-1 (74HC191) to Output-3.
  16. Connect Pin-2 (Output) of ICBase-1 (74HC191) to Pin-1 (Input) of ICBase-2 (74LS20).
  17. Connect Pin-3 (Output) of ICBase-1 (74HC191) to Pin-2 (Input) of ICBase-2 (74LS20).
  18. Connect Pin-6 (Output) of ICBase-1 (74HC191) to Pin-4 (Input) of ICBase-2 (74LS20).
  19. Connect Pin-7 (Output) of ICBase-1 (74HC191) to Pin-5 (Input) of ICBase-2 (74LS20).
  20. Connect Pin-15 (Input) of ICBase-1 (74HC191) to Pin-6 (Output) of ICBase-2 (74LS20).
  21. Connect Pin-7 (Ground) of ICBase-2 (74LS20) to GND Port.
  22. Connect Pin-20 (VCC) of ICBase-2 (74LS20) to VCC Port.