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enter image description here

Can someone explain to me how you can power (vcc, vdd whatever) a logic gate in Proteus, with only the input and output pins being shown? Thanks in advance.

The above is the circuit I want to implement. I read that this is the circuit of a basic oscillator.I want to connect the power lines with the power source. Can anyone help me?

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2 Answers 2

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I think you can find it in terminal mode on left

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For simulation, there's no need to power that kind of ICs, because ISIS can simulate them with or without a power.

If you need the power connection for PCB design purposes then POWER terminal is what you are looking for. You can find it under TERMINAL MODE to the left:

enter image description here

Once you place a POWER terminal, the invisible VCC/VDD pins of the chips will connect to this terminal automatically.

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  • \$\begingroup\$ What if I want to connect them to another circuit, not directly to the power supply? \$\endgroup\$
    – user153670
    Dec 27, 2017 at 13:56
  • \$\begingroup\$ When I try this circuit I get the error 'No power supply specified for net VDD and/or VSS in Power Rail Configuration'. \$\endgroup\$
    – user153670
    Dec 27, 2017 at 14:13
  • \$\begingroup\$ @Mats POWER terminal provides 5V by default but you can connect that POWER terminal to the output of another circuit so that the invisible VCC/VDD pins can connect another circuit block. \$\endgroup\$ Dec 27, 2017 at 15:10
  • \$\begingroup\$ @Mats Put the schematic into your original question so we can suggest something. \$\endgroup\$ Dec 27, 2017 at 15:11
  • \$\begingroup\$ I've added a circuit diagram to the original question.Can you help me? \$\endgroup\$
    – user153670
    Jan 1, 2018 at 7:25

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