StopWatch

Shashant Vairamuthu
Shashant Vairamuthu
• Created on Apr 19, 2026 • 0 • 0 • 3
Edit Circuit Copy Circuit Try Yourself
StopWatch
100%

Integrated Circuits Used

74LS90 74LS08 74LS32

Description

Fcasd Project (timer usinf 190 and 191)

Procedure

  1. Connect Pin-5 (VCC) of ICBase-1 (74LS90) to VCC Port.
  2. Connect VCC Port to Pin-5 (VCC) of ICBase-2 (74LS90).
  3. Connect Pin-5 (Input) of ICBase-3 (74LS08) to VCC Port.
  4. Connect Pin-5 (Input) of ICBase-4 (74LS32) to VCC Port.
  5. Connect GND Port to Pin-10 (Input & Output) of ICBase-2 (74LS90).
  6. Connect GND Port to Pin-10 (Input & Output) of ICBase-1 (74LS90).
  7. Connect GND Port to Pin-10 (Input & Output) of ICBase-3 (74LS08).
  8. Connect Pin-10 (Input & Output) of ICBase-4 (74LS32) to GND Port.
  9. Connect GND Port to Pin-6 (Input) of ICBase-1 (74LS90).
  10. Connect GND Port to Pin-7 (Input) of ICBase-1 (74LS90).
  11. Connect GND Port to Pin-6 (Input) of ICBase-2 (74LS90).
  12. Connect GND Port to Pin-7 (Input) of ICBase-2 (74LS90).
  13. Connect Pin-1 (Input) of ICBase-1 (74LS90) to Pin-12 (Input & Output) of ICBase-1 (74LS90).
  14. Connect Pin-14 (Output) of ICBase-3 (74LS08) to Pin-3 (Input) of ICBase-1 (74LS90).
  15. Connect Seven segment display 1 to Pin-12 (Input & Output) of ICBase-1 (74LS90).
  16. Connect Pin-9 (Input & Output) of ICBase-1 (74LS90) to Seven segment display 1.
  17. Connect Seven segment display 1 to Pin-8 (Input & Output) of ICBase-1 (74LS90).
  18. Connect Pin-11 (Input & Output) of ICBase-1 (74LS90) to Seven segment display 1.
  19. Connect Pin-12 (Input & Output) of ICBase-2 (74LS90) to Pin-1 (Input) of ICBase-2 (74LS90).
  20. Connect Pin-11 (Input & Output) of ICBase-1 (74LS90) to Pin-14 (Output) of ICBase-2 (74LS90).
  21. Connect Seven segment display 2 to Pin-12 (Input & Output) of ICBase-2 (74LS90).
  22. Connect Seven segment display 2 to Pin-9 (Input & Output) of ICBase-2 (74LS90).
  23. Connect Seven segment display 2 to Pin-8 (Input & Output) of ICBase-2 (74LS90).
  24. Connect Seven segment display 2 to Pin-11 (Input & Output) of ICBase-2 (74LS90).
  25. Connect Clock port of 1Hz frequency to Pin-1 (Input) of ICBase-3 (74LS08).
  26. Connect Input-0 to Pin-2 (Input) of ICBase-3 (74LS08).
  27. Connect Pin-4 (Input) of ICBase-3 (74LS08) to Pin-9 (Input & Output) of ICBase-2 (74LS90).
  28. Connect Pin-5 (Input) of ICBase-3 (74LS08) to Pin-8 (Input & Output) of ICBase-2 (74LS90).
  29. Connect Pin-1 (Input) of ICBase-4 (74LS32) to Output-6.
  30. Connect Input-1 to Pin-2 (Input) of ICBase-4 (74LS32).
  31. Connect Pin-2 (Input) of ICBase-1 (74LS90) to Pin-3 (Output) of ICBase-4 (74LS32).
  32. Connect Pin-2 (Input) of ICBase-2 (74LS90) to Pin-3 (Output) of ICBase-4 (74LS32).
  33. Connect Pin-3 (Input) of ICBase-2 (74LS90) to Pin-3 (Output) of ICBase-4 (74LS32).
  34. Connect Pin-3 (Input) of ICBase-1 (74LS90) to Pin-3 (Output) of ICBase-4 (74LS32).
  35. Add IC 74LS90 into ICBase-1 (74LS90).
  36. Add IC 74LS90 into ICBase-2 (74LS90).
  37. Add IC 74LS08 into ICBase-3 (74LS08).
  38. Add IC 74LS32 into ICBase-4 (74LS32).
  39. Connect GND Port to Pin-20 (VCC) of ICBase-4 (74LS32).
  40. Connect GND Port to Pin-20 (VCC) of ICBase-3 (74LS08).
  41. Connect GND Port to Pin-16 (Ground) of ICBase-2 (74LS90).
  42. Connect GND Port to Pin-16 (Ground) of ICBase-1 (74LS90).
  43. Connect VCC Port to Pin-7 (Ground) of ICBase-3 (74LS08).
  44. Connect VCC Port to Pin-7 (Ground) of ICBase-4 (74LS32).