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I'm implementing the following scheme and I have trouble with IC4 element (7430: 8-pin NAND) that have 7 and 14 pins, as I understand, VCC and GROUND respectively. But in Proteus 8 NAND don't have these pins. Also on IC[1-3] pins +V are missing. What should I do? Frequency Divider

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  • \$\begingroup\$ what about the 7490? ... why are you not asking about them? ... does the simulation work without the power connections? \$\endgroup\$
    – jsotola
    May 28, 2023 at 22:34
  • \$\begingroup\$ You know, yes, 7490 too. In general, some elements in the scheme have pins that aren't in Proteus. \$\endgroup\$
    – EpicMandM
    May 28, 2023 at 22:40
  • \$\begingroup\$ Does it mean that the scheme should be revised? \$\endgroup\$
    – EpicMandM
    May 28, 2023 at 22:41
  • \$\begingroup\$ what do you mean by revised? \$\endgroup\$
    – jsotola
    May 29, 2023 at 0:07
  • \$\begingroup\$ When I said that the scheme should be revised, I meant that the schematic should propably be updated to reflect the actual pinouts of the ICs. \$\endgroup\$
    – EpicMandM
    May 29, 2023 at 1:09

1 Answer 1

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This is fortunately a very simple task. By default, the GND and VCC pins are connected to the GND and VCC net. If you haven't changed them, VCC will be defaulted to 5V.

To change them, right click the component and select properties. You can then select "hidden Pins". This will be an option for any IC where pins are hidden.

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Once you have done that, you can select the nets for them to be connected to.

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Simply select the net you want the power rails connected to. Make sure you have set your nets up before.

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