MOD-8 Counter using D Flip-Flop IC-74LS74

Step-by-Step Procedure

1. Click on 'Next' button to Add IC-74LS74
2. Click on 'Next' button to Connect GND and VCC of IC
3. Click on 'Next' button to Connect Clock Pin to clock port
4. Click on 'Next' button to Connect -QA to 7-Seg Display
5. Click on 'Next' button to Connect -QA to D1
6. Click on 'Next' button to Connect QA to Clock Pin-2
7. Click on 'Next' button to Connect -QB to 7-Seg Display
8. Click on 'Next' button to Connect -QB to D2
9. Click on 'Next' button to Connect CLEAR Pins to input port
10. Click on 'Next' button to Connect PR Pins to Vcc
11. Click on 'Next' button to Add another IC-74LS74
12. Click on 'Next' button to Connect GND and VCC of IC
13. Click on 'Next' button to Connect CLEAR to input port
14. Click on 'Next' button to Connect QB to clock port
15. Click on 'Next' button to Connect -QA to 7-Seg Display
16. Click on 'Next' button to Connect -QC to D2
17. Click on 'Next' button to Connect PR Pin to Vcc

Block Diagram

ICs used in this circuit with pin diagram

74LS74

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74LS74

Dual Positive-Edge-Triggered D-Flip-Flops with Preset, Clear and Complimentary Outputs

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