3 bit synchronous down counter

Khushi
Khushi Padole
• Created on Sep 9, 2025 • 5 • 2 • 1
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3 bit synchronous down counter
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Integrated Circuits Used

74LS08

Procedure

  1. Connect VCC Port to Pin-5 (Input & Output) of ICBase-2.
  2. Connect VCC Port to Pin-5 (Input & Output) of ICBase-1.
  3. Connect Manual clock Port to Pin-1 (Input & Output) of ICBase-1.
  4. Connect Manual clock Port to Pin-1 (Input & Output) of ICBase-2.
  5. Connect Manual clock Port to Pin-6 (Input & Output) of ICBase-1.
  6. Connect GND Port to Pin-17 (Input & Output) of ICBase-1.
  7. Connect GND Port to Pin-17 (Input & Output) of ICBase-2.
  8. Connect Input-8 to Pin-20 (Input & Output) of ICBase-1.
  9. Connect Input-8 to Pin-4 (Input & Output) of ICBase-1.
  10. Connect Output-7 to Pin-19 (Input & Output) of ICBase-1.
  11. Add IC 74LS08 into ICBase-3 (74LS08).
  12. Connect Pin-1 (Input) of ICBase-3 (74LS08) to Pin-18 (Input & Output) of ICBase-1.
  13. Connect Pin-2 (Input) of ICBase-3 (74LS08) to Pin-14 (Input & Output) of ICBase-1.
  14. Connect Pin-20 (Input & Output) of ICBase-2 to Pin-3 (Output) of ICBase-3 (74LS08).
  15. Connect Pin-4 (Input & Output) of ICBase-2 to Pin-3 (Output) of ICBase-3 (74LS08).
  16. Connect Output-5 to Pin-19 (Input & Output) of ICBase-2.
  17. Connect Output-6 to Pin-15 (Input & Output) of ICBase-1.
  18. Connect VCC Port to Pin-2 (Input & Output) of ICBase-1.
  19. Connect VCC Port to Pin-7 (Input & Output) of ICBase-1.
  20. Connect VCC Port to Pin-2 (Input & Output) of ICBase-2.
  21. Connect Input-12 to Pin-3 (Input & Output) of ICBase-1.
  22. Connect Input-12 to Pin-8 (Input & Output) of ICBase-1.
  23. Connect Input-12 to Pin-3 (Input & Output) of ICBase-2.
  24. Connect VCC Port to Pin-20 (VCC) of ICBase-3 (74LS08).
  25. Connect GND Port to Pin-7 (Ground) of ICBase-3 (74LS08).
  26. Connect Pin-16 (Input & Output) of ICBase-1 to Pin-18 (Input & Output) of ICBase-1.
  27. Connect Pin-13 (Input & Output) of ICBase-1 to Pin-18 (Input & Output) of ICBase-1.