I tried to vote to close the following question, as a duplicate. But couldn't vote. Reason given was that the duplicate hadn't been answered yet.

Clearly a duplicate post.

Have the guidelines regarding "duplicate" changed recently?

The quote was, "This question does not have an upvoted or accepted answer"

I see this kind of drawing in many questions, so I believe there is a popular bit of software or utility that generates it, but I don't know what it is. Can someone clue me in?

@uhoh this vaguely resembles something drawn by KiCad?

@Shalvenay oh, I see what you mean, e.g. learn.sparkfun.com/tutorials/beginners-guide-to-kicad/all

yes, that seems to be it most likely. Thanks!

@uhoh It might be KiCad, but maybe not. There are many programs that can be used for schematic capture and PCB layout. KiCad is just one of them. I don't think it is KiCad. The KiCad versions I have used don't show the little "grabbers" by the parts and designators (the little + signs.)

@JRE yes, I see what you mean. It's a GB download so I'm not going to do it today. I checked a few docs/tutorials and they do look different than this.

@uhoh KiCad is a good starting place for hobby stuff. Professional engineers might find it lacking in things you need in a production environment, or for really complex digital or RF stuff. On the plus side, it has no artificial limits on layers, board size, or pin count like many "free" versions of commercial software (Eagle, Altium, Diptrace, etc.)

I use KiCad, and find it easy enough to get along with. I don't use it daily, but have no trouble picking again after a couple of months to start a new project.

okay maybe I will give it a try, thanks for the info!

@uhoh The color scheme suggests that it was drawn in Cadsoft Eagle. For a while, it was the package of choice in the Open Source Hardware community.

@All I’m confused on a circuit. It is a voltage multiplier. What capacitors are used? The schematic has a general capacitor symbol. But I don’t know what capacitor it means.

@ScientistSmithYT generally, you see high voltage film capacitors in voltage multipliers

@NickAlexeev thanks for the lead, I'll check it out.