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I have the following voltage doubler: Voltage doubler

Taken from an answer in another post of mine.

This is to be used in an audio circuit, and the system will be connected to USB as well. Can the ground in this circuit be connected to USB ground, or will I have a bad day if I do that? If it can not, how would you go about solving this predicament?

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    \$\begingroup\$ Why wouldn't it? \$\endgroup\$ Aug 11, 2023 at 0:06
  • \$\begingroup\$ I was a bit nervous that they might be at different voltage potentials, but that is impossible? \$\endgroup\$ Aug 11, 2023 at 0:16

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Yes, it can.

Because that power supply circuit (as drawn) is isolated.

I say "as drawn" because we don't know if you plan to do something unusual in the circuits you did not show us.

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  • \$\begingroup\$ Thank you for the answer. I don't know what constitutes unusual. It's connected to the outlet through a certified ac/ac adapter, which is basically just a transformer (9v, not 24v). USB will power some chips (from phone or computer), and the circuit shown will power op-amps. Everything with common ground. All is good, right? Again, thank you for answering \$\endgroup\$ Aug 11, 2023 at 8:09
  • \$\begingroup\$ "All is good, right?". Right. \$\endgroup\$ Aug 11, 2023 at 11:58

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