MOD-72 decade counter

Sonali
Sonali Abhale
• Created on Dec 9, 2020 • 0 • 0 • 2
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MOD-72 decade counter
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Integrated Circuits Used

74LS90 74LS21

Procedure

  1. Connect Pin-15 (Output) of ICBase-2 (74LS90) to Pin-1 (Input) of ICBase-4 (74LS21).
  2. Connect Pin-18 (Output) of ICBase-3 (74LS90) to Pin-2 (Input) of ICBase-4 (74LS21).
  3. Add IC 74LS90 into ICBase-2 (74LS90).
  4. Add IC 74LS90 into ICBase-3 (74LS90).
  5. Connect VCC Port to Pin-5 (VCC) of ICBase-2 (74LS90).
  6. Connect VCC Port to Pin-5 (VCC) of ICBase-3 (74LS90).
  7. Connect GND Port to Pin-16 (Ground) of ICBase-2 (74LS90).
  8. Connect GND Port to Pin-16 (Ground) of ICBase-3 (74LS90).
  9. Connect GND Port to Pin-7 (Ground) of ICBase-4 (74LS21).
  10. Connect VCC Port to Pin-20 (VCC) of ICBase-4 (74LS21).
  11. Connect Clock port of 5Hz frequency to Pin-20 (Input) of ICBase-2 (74LS90).
  12. Connect Pin-18 (Output) of ICBase-2 (74LS90) to Pin-1 (Input) of ICBase-2 (74LS90).
  13. Connect Pin-18 (Output) of ICBase-3 (74LS90) to Pin-1 (Input) of ICBase-3 (74LS90).
  14. Connect Pin-17 (Output) of ICBase-2 (74LS90) to Pin-20 (Input) of ICBase-3 (74LS90).
  15. Connect GND Port to Pin-6 (Input) of ICBase-2 (74LS90).
  16. Connect GND Port to Pin-7 (Input) of ICBase-2 (74LS90).
  17. Connect GND Port to Pin-6 (Input) of ICBase-3 (74LS90).
  18. Connect GND Port to Pin-7 (Input) of ICBase-3 (74LS90).
  19. Connect Seven segment display 1 to Pin-14 (Output) of ICBase-2 (74LS90).
  20. Connect Seven segment display 2 to Pin-14 (Output) of ICBase-3 (74LS90).
  21. Connect Seven segment display 1 to Pin-15 (Output) of ICBase-2 (74LS90).
  22. Connect Seven segment display 2 to Pin-15 (Output) of ICBase-3 (74LS90).
  23. Connect Seven segment display 1 to Pin-17 (Output) of ICBase-2 (74LS90).
  24. Connect Seven segment display 2 to Pin-17 (Output) of ICBase-3 (74LS90).
  25. Connect Seven segment display 1 to Pin-18 (Output) of ICBase-2 (74LS90).
  26. Connect Seven segment display 2 to Pin-18 (Output) of ICBase-3 (74LS90).
  27. Connect Pin-2 (Input) of ICBase-3 (74LS90) to Pin-6 (Output) of ICBase-4 (74LS21).
  28. Connect Pin-6 (Output) of ICBase-4 (74LS21) to Pin-3 (Input) of ICBase-3 (74LS90).
  29. Connect Pin-2 (Input) of ICBase-2 (74LS90) to Pin-6 (Output) of ICBase-4 (74LS21).
  30. Connect Pin-6 (Output) of ICBase-4 (74LS21) to Pin-3 (Input) of ICBase-2 (74LS90).
  31. Connect Pin-4 (Input) of ICBase-4 (74LS21) to Pin-15 (Output) of ICBase-3 (74LS90).
  32. Connect Pin-5 (Input) of ICBase-4 (74LS21) to Pin-14 (Output) of ICBase-3 (74LS90).
  33. Add IC 74LS21 into ICBase-4 (74LS21).