mod 67 using 7490

Prasad Devkar
Prasad Devkar
• Created on Nov 1, 2026 • 0 • 0 • 3
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mod 67 using 7490
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Integrated Circuits Used

74LS90 74LS11 74LS08

Procedure

  1. Add IC 74LS90 into ICBase-2 (74LS90).
  2. Add IC 74LS90 into ICBase-3 (74LS90).
  3. Connect Pin-18 (Output) of ICBase-2 (74LS90) to Pin-1 (Input) of ICBase-2 (74LS90).
  4. Connect VCC Port to Pin-5 (VCC) of ICBase-2 (74LS90).
  5. Connect GND Port to Pin-6 (Input) of ICBase-2 (74LS90).
  6. Connect Pin-7 (Input) of ICBase-2 (74LS90) to GND Port.
  7. Connect Manual clock Port to Pin-20 (Input) of ICBase-2 (74LS90).
  8. Connect Output-2 to Pin-14 (Output) of ICBase-2 (74LS90).
  9. Connect Output-1 to Pin-15 (Output) of ICBase-2 (74LS90).
  10. Connect GND Port to Pin-16 (Ground) of ICBase-2 (74LS90).
  11. Connect Output-3 to Pin-17 (Output) of ICBase-2 (74LS90).
  12. Connect Pin-18 (Output) of ICBase-2 (74LS90) to Output-0.
  13. Connect Pin-20 (Input) of ICBase-3 (74LS90) to Pin-17 (Output) of ICBase-2 (74LS90).
  14. Connect Pin-18 (Output) of ICBase-3 (74LS90) to Pin-1 (Input) of ICBase-3 (74LS90).
  15. Connect VCC Port to Pin-5 (VCC) of ICBase-3 (74LS90).
  16. Connect GND Port to Pin-6 (Input) of ICBase-3 (74LS90).
  17. Connect GND Port to Pin-7 (Input) of ICBase-3 (74LS90).
  18. Connect Output-7 to Pin-14 (Output) of ICBase-3 (74LS90).
  19. Connect Output-6 to Pin-15 (Output) of ICBase-3 (74LS90).
  20. Connect GND Port to Pin-16 (Ground) of ICBase-3 (74LS90).
  21. Connect Output-8 to Pin-17 (Output) of ICBase-3 (74LS90).
  22. Connect Output-5 to Pin-18 (Output) of ICBase-3 (74LS90).
  23. Add IC 74LS11 into ICBase-4 (74LS11).
  24. Connect VCC Port to Pin-20 (VCC) of ICBase-4 (74LS11).
  25. Connect GND Port to Pin-7 (Ground) of ICBase-4 (74LS11).
  26. Connect Pin-1 (Input) of ICBase-4 (74LS11) to Pin-18 (Output) of ICBase-2 (74LS90).
  27. Connect Pin-15 (Output) of ICBase-2 (74LS90) to Pin-2 (Input) of ICBase-4 (74LS11).
  28. Connect Pin-14 (Output) of ICBase-2 (74LS90) to Pin-19 (Input) of ICBase-4 (74LS11).
  29. Add IC 74LS08 into ICBase-5 (74LS08).
  30. Connect GND Port to Pin-7 (Ground) of ICBase-5 (74LS08).
  31. Connect VCC Port to Pin-20 (VCC) of ICBase-5 (74LS08).
  32. Connect Pin-1 (Input) of ICBase-5 (74LS08) to Pin-15 (Output) of ICBase-3 (74LS90).
  33. Connect Pin-2 (Input) of ICBase-5 (74LS08) to Pin-14 (Output) of ICBase-3 (74LS90).
  34. Connect Pin-4 (Input) of ICBase-5 (74LS08) to Pin-3 (Output) of ICBase-5 (74LS08).
  35. Connect Pin-18 (Output) of ICBase-4 (74LS11) to Pin-5 (Input) of ICBase-5 (74LS08).
  36. Connect Pin-2 (Input) of ICBase-3 (74LS90) to Pin-6 (Output) of ICBase-5 (74LS08).
  37. Connect Pin-6 (Output) of ICBase-5 (74LS08) to Pin-3 (Input) of ICBase-3 (74LS90).
  38. Connect Pin-2 (Input) of ICBase-2 (74LS90) to Pin-6 (Output) of ICBase-5 (74LS08).
  39. Connect Pin-6 (Output) of ICBase-5 (74LS08) to Pin-3 (Input) of ICBase-2 (74LS90).