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The following uses 3 TTL 74SLS76N J-K flip-flops, which are active low:

enter image description here

However, I'm trying to figure out what the settings for the PR and CLR inputs would be using CMOS CD4027 J-K flip-flops. For example, would the PR and CLR inputs be the inverse of the ones shown above for the number 2 using CMOS: 01 10 01?

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  • \$\begingroup\$ The 7404 is a hex inverter, not a flipflop. What is the correct part number? \$\endgroup\$
    – AnalogKid
    Commented Oct 31, 2022 at 17:19
  • \$\begingroup\$ Sorry about that. The correct part number for the TTL JK flip flop is 74LS76N \$\endgroup\$
    – Licentia
    Commented Oct 31, 2022 at 17:46
  • \$\begingroup\$ Yes, the CD4027 has active high set and clear, so just invert your settings. \$\endgroup\$
    – td127
    Commented Oct 31, 2022 at 18:37

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