4-Bit Asynchronous DOWN Counter using 74LS76

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Preview of 4-Bit Asynchronous DOWN Counter using 74LS76 with 74LS76 ICs
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Tutorial

Start by tapping on Next button.

1. Click on 'Next' button to Add Two IC-74LS76

Click on 'Next' button to Add Two IC-74LS76

2. Click on 'Next' button to Connect GND and VCC of both ICs

Click on 'Next' button to Connect GND and VCC of both ICs

3. Click on 'Next' button to Connect J-1 to Vcc

Click on 'Next' button to Connect J-1 to Vcc

4. Click on 'Next' button to Connect K-1 to Vcc

Click on 'Next' button to Connect K-1 to Vcc

5. Click on 'Next' button to Connect CLOCK-1 to Automatic Clock Port

Click on 'Next' button to Connect CLOCK-1 to Automatic Clock Port

6. Click on 'Next' button to Connect PR-1 to Vcc

Click on 'Next' button to Connect PR-1 to Vcc

7. Click on 'Next' button to Connect Q-1 to Output port

Click on 'Next' button to Connect Q-1 to Output port

8. Click on 'Next' button to Connect CLEAR-1 to Input Pin-1

Click on 'Next' button to Connect CLEAR-1 to Input Pin-1

9. Click on 'Next' button to Connect -Q1 (Pin 14) to CLOCK-2

Click on 'Next' button to Connect -Q1 (Pin 14) to CLOCK-2

10. Click on 'Next' button to Connect J-2 to Vcc

Click on 'Next' button to Connect J-2 to Vcc

11. Click on 'Next' button to Connect K-2 to Vcc

Click on 'Next' button to Connect K-2 to Vcc

12. Click on 'Next' button to Connect PR-2 to Vcc

Click on 'Next' button to Connect PR-2 to Vcc

13. Click on 'Next' button to Connect CLEAR-2 to Input Pin-1

Click on 'Next' button to Connect CLEAR-2 to Input Pin-1

14. Click on 'Next' button to Connect Q-2 to Output Port

Click on 'Next' button to Connect Q-2 to Output Port

15. Click on 'Next' button to Connect -Q2 (Pin 10) to CLOCK-1 of IC-2

Click on 'Next' button to Connect -Q2 (Pin 10) to CLOCK-1 of IC-2

16. Click on 'Next' button to Connect J3 (J-1 of IC-2) to Vcc

Click on 'Next' button to Connect J3 (J-1 of IC-2) to Vcc

17. Click on 'Next' button to Connect K3 (K-1 of IC-2) to Vcc

Click on 'Next' button to Connect K3 (K-1 of IC-2) to Vcc

18. Click on 'Next' button to Connect PR-3 (PR-1 of IC-2) to Vcc

Click on 'Next' button to Connect PR-3 (PR-1 of IC-2) to Vcc

19. Click on 'Next' button to Connect CLEAR-3 (CLEAR-1 of IC-2) to Input Pin-1

Click on 'Next' button to Connect CLEAR-3 (CLEAR-1 of IC-2) to Input Pin-1

20. Click on 'Next' button to Connect Q-3 (Q-1 of IC-2) to Output Port

Click on 'Next' button to Connect Q-3 (Q-1 of IC-2) to Output Port

21. Click on 'Next' button to Connect -Q3 (-Q1 of IC-2) to CLOCK-2 of IC-2

Click on 'Next' button to Connect -Q3 (-Q1 of IC-2) to CLOCK-2 of IC-2

22. Click on 'Next' button to Connect J-4 (J-2 of IC-2) to Vcc

Click on 'Next' button to Connect J-4 (J-2 of IC-2) to Vcc

23. Click on 'Next' button to Connect K-4 (K-2 of IC-2) to Vcc

Click on 'Next' button to Connect K-4 (K-2 of IC-2) to Vcc

24. Click on 'Next' button to Connect PR-4 (PR-2 of IC-2) to Vcc

Click on 'Next' button to Connect PR-4 (PR-2 of IC-2) to Vcc

25. Click on 'Next' button to Connect CLEAR-4 (CLEAR of IC-2) to Input Pin-1

Click on 'Next' button to Connect CLEAR-4 (CLEAR of IC-2) to Input Pin-1

26. Click on 'Next' button to Connect Q-4 (Q-2 of IC-2) to Output Port

Click on 'Next' button to Connect Q-4 (Q-2 of IC-2) to Output Port

Done

You have completed the tutorial. Power on the circuit to test the behavior.

Step-by-Step Procedure

  1. Click on 'Next' button to Add Two IC-74LS76
  2. Click on 'Next' button to Connect GND and VCC of both ICs
  3. Click on 'Next' button to Connect J-1 to Vcc
  4. Click on 'Next' button to Connect K-1 to Vcc
  5. Click on 'Next' button to Connect CLOCK-1 to Automatic Clock Port
  6. Click on 'Next' button to Connect PR-1 to Vcc
  7. Click on 'Next' button to Connect Q-1 to Output port
  8. Click on 'Next' button to Connect CLEAR-1 to Input Pin-1
  9. Click on 'Next' button to Connect -Q1 (Pin 14) to CLOCK-2
  10. Click on 'Next' button to Connect J-2 to Vcc
  11. Click on 'Next' button to Connect K-2 to Vcc
  12. Click on 'Next' button to Connect PR-2 to Vcc
  13. Click on 'Next' button to Connect CLEAR-2 to Input Pin-1
  14. Click on 'Next' button to Connect Q-2 to Output Port
  15. Click on 'Next' button to Connect -Q2 (Pin 10) to CLOCK-1 of IC-2
  16. Click on 'Next' button to Connect J3 (J-1 of IC-2) to Vcc
  17. Click on 'Next' button to Connect K3 (K-1 of IC-2) to Vcc
  18. Click on 'Next' button to Connect PR-3 (PR-1 of IC-2) to Vcc
  19. Click on 'Next' button to Connect CLEAR-3 (CLEAR-1 of IC-2) to Input Pin-1
  20. Click on 'Next' button to Connect Q-3 (Q-1 of IC-2) to Output Port
  21. Click on 'Next' button to Connect -Q3 (-Q1 of IC-2) to CLOCK-2 of IC-2
  22. Click on 'Next' button to Connect J-4 (J-2 of IC-2) to Vcc
  23. Click on 'Next' button to Connect K-4 (K-2 of IC-2) to Vcc
  24. Click on 'Next' button to Connect PR-4 (PR-2 of IC-2) to Vcc
  25. Click on 'Next' button to Connect CLEAR-4 (CLEAR of IC-2) to Input Pin-1
  26. Click on 'Next' button to Connect Q-4 (Q-2 of IC-2) to Output Port

Block Diagram

Block diagram representing pin diagram of 4-Bit Asynchronous DOWN Counter using 74LS76 with 74LS76 ICs

ICs used in this circuit with pin diagram



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