Half adder decoder

Simran
Simran Agrawal
• Created on Aug 28, 2025 • 0 • 0 • 3
Edit Circuit Copy Circuit Try Yourself
Half adder decoder
100%

Integrated Circuits Used

74LS21 74LS14 74LS139

Procedure

  1. Add IC 74LS21 into ICBase-1 (74LS21).
  2. Add IC 74LS14 into ICBase-2 (74LS14).
  3. Connect Pin-1 (Input) of ICBase-2 (74LS14) to Input-14.
  4. Connect Input-13 to Pin-3 (Input) of ICBase-2 (74LS14).
  5. Connect Pin-1 (Input) of ICBase-1 (74LS21) to Input-15.
  6. Connect Pin-2 (Input) of ICBase-1 (74LS21) to Pin-2 (Output) of ICBase-2 (74LS14).
  7. Connect Pin-4 (Input) of ICBase-1 (74LS21) to Pin-3 (Input & Output) of ICBase-1 (74LS21).
  8. Connect Output-15 to Pin-6 (Output) of ICBase-1 (74LS21).
  9. Connect GND Port to Pin-7 (Ground) of ICBase-1 (74LS21).
  10. Connect Pin-19 (Input) of ICBase-1 (74LS21) to Input-15.
  11. Connect Pin-4 (Output) of ICBase-2 (74LS14) to Pin-5 (Input) of ICBase-1 (74LS21).
  12. Connect Pin-2 (Output) of ICBase-2 (74LS14) to Pin-18 (Input) of ICBase-1 (74LS21).
  13. Connect Pin-16 (Input) of ICBase-1 (74LS21) to Pin-17 (Input & Output) of ICBase-1 (74LS21).
  14. Connect Input-13 to Pin-15 (Input) of ICBase-1 (74LS21).
  15. Connect Output-14 to Pin-14 (Output) of ICBase-1 (74LS21).
  16. Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS21).
  17. Connect GND Port to Pin-7 (Ground) of ICBase-2 (74LS14).
  18. Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS14).
  19. Add IC 74LS139 into ICBase-4 (74LS139).
  20. Connect Input-15 to Pin-1 (Input) of ICBase-4 (74LS139).
  21. Connect Input-14 to Pin-2 (Input) of ICBase-4 (74LS139).
  22. Connect Input-13 to Pin-3 (Input) of ICBase-4 (74LS139).
  23. Connect Pin-20 (VCC) of ICBase-4 (74LS139) to VCC Port.
  24. Connect Output-0 to Pin-13 (Output) of ICBase-4 (74LS139).
  25. Connect Output-1 to Pin-14 (Output) of ICBase-4 (74LS139).
  26. Connect Output-2 to Pin-15 (Output) of ICBase-4 (74LS139).
  27. Connect Output-3 to Pin-16 (Output) of ICBase-4 (74LS139).
  28. Connect GND Port to Pin-8 (Ground) of ICBase-4 (74LS139).