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Samruddhi
Samruddhi Raskar
• Created on Apr 18, 2026 • 0 • 0 • 2
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Integrated Circuits Used

74LS08 74LS90

Procedure

  1. Connect Output-5 to VCC Port.
  2. Connect Input-10 to GND Port.
  3. Connect Pin-14 (Output) of ICBase-1 (74LS90) to Clock port of 0.5Hz frequency.
  4. Connect Pin-12 (Input & Output) of ICBase-1 (74LS90) to Clock port of 1Hz frequency.
  5. Connect Pin-12 (Input & Output) of ICBase-1 (74LS90) to Output-0.
  6. Connect Pin-2 (Input) of ICBase-1 (74LS90) to GND Port.
  7. Connect Pin-3 (Input) of ICBase-1 (74LS90) to GND Port.
  8. Connect Pin-6 (Input) of ICBase-1 (74LS90) to GND Port.
  9. Connect Pin-7 (Input) of ICBase-1 (74LS90) to GND Port.
  10. Connect Pin-9 (Input & Output) of ICBase-1 (74LS90) to Output-1.
  11. Connect Pin-8 (Input & Output) of ICBase-1 (74LS90) to Output-2.
  12. Connect Pin-11 (Input & Output) of ICBase-1 (74LS90) to Output-3.
  13. Connect Pin-14 (Output) of ICBase-2 (74LS90) to Pin-11 (Input & Output) of ICBase-1 (74LS90).
  14. Connect Pin-12 (Input & Output) of ICBase-2 (74LS90) to Clock port of 1Hz frequency.
  15. Connect Pin-9 (Input & Output) of ICBase-2 (74LS90) to Pin-1 (Input) of ICBase-3 (74LS08).
  16. Connect Pin-8 (Input & Output) of ICBase-2 (74LS90) to Pin-2 (Input) of ICBase-3 (74LS08).
  17. Connect Pin-3 (Output) of ICBase-3 (74LS08) to Pin-2 (Input) of ICBase-2 (74LS90).
  18. Connect Pin-2 (Input) of ICBase-3 (74LS08) to Pin-3 (Input) of ICBase-2 (74LS90).
  19. Add IC 74LS08 into ICBase-3 (74LS08).
  20. Add IC 74LS90 into ICBase-2 (74LS90).
  21. Connect Pin-5 (VCC) of ICBase-1 (74LS90) to VCC Port.
  22. Connect Pin-10 (Input & Output) of ICBase-1 (74LS90) to GND Port.
  23. Add IC 74LS90 into ICBase-1 (74LS90).
  24. Connect Pin-5 (VCC) of ICBase-2 (74LS90) to GND Port.
  25. Connect Pin-5 (Input) of ICBase-3 (74LS08) to Pin-5 (VCC) of ICBase-2 (74LS90).
  26. Connect Pin-6 (Input) of ICBase-2 (74LS90) to VCC Port.
  27. Connect Pin-20 (VCC) of ICBase-3 (74LS08) to VCC Port.
  28. Connect Pin-16 (Ground) of ICBase-2 (74LS90) to Pin-16 (Ground) of ICBase-1 (74LS90).