# What does this circuit symbol mean? [duplicate]

This question already has an answer here:

I'm a student who is trying to build a wah pedal for a guitar. I came across this diagram for how to wire the circuit (from this site) :

Within the diagram, I am not sure what the following symbol means:

This variant of the symbol also appears in the diagram and I am not sure what to make of it either:

I'd much appreciate if anyone could explain these symbols to me as the only place I have been able to find these online was on this very circuit diagram and no context is provided as to their meaning.

## marked as duplicate by Eugene Sh., Elliot Alderson, Finbarr, JRE, Nick Alexeev♦Jun 18 at 14:47

• @EugeneSh. related, I would say but not a duplicate. The linked question is asking what pin is what. This question is asking what is the symbol. That's 2 different questions. – MCG Jun 12 at 14:39
• @MCG The title of that one is the answer to this one, no? So I would say that this question is a subset of the linked one. – Eugene Sh. Jun 12 at 14:40
• @EugeneSh. Subset is not a duplicate. A duplicate to me is someone asking the same question and would receive the same answers. Therefore, it is not a duplicate. It is certainly related though – MCG Jun 12 at 14:42
• @MCG Well, I don't know how SE is defining it. If someone is asking how much is 1+1, then it can be definitely closed as a duplicate of a question asking how much is x+y. Anyway, we don't have to agree on this :) – Eugene Sh. Jun 12 at 14:44
• It's not really a DC ("barrel") jack; given the application this is probably a TS jack, probably the ¼" variety. They have the same symbol, though. – Hearth Jun 12 at 14:46