# Anyone knows the symbol of a jumper wire?

#### bloguetronica

Joined Apr 27, 2007
1,372
I'm working on an amplifier project that will need ground decoupling. I will have two grounds, one for the input and feedback circuit and other for the output and amplifier. I will connect both grounds using a wire. My question is, what is the apropriate symbol for a jumper wire like that?

I tried to search the web for this but didn't got lucky.

#### John Luciani

Joined Apr 3, 2007
477
I have seen jumpers done with an arc and a hollow circle at each end.
Imagine a parethesis rotated 90deg and place a hollow circle at
either end. If I come across an example I will post a link.

(* jcl *)

#### beenthere

Joined Apr 20, 2004
15,819
As an indicator on the pc board, make a line between the pads using the top silk layer. If you want it to show up on the CAD file, do the line as top copper.

#### SgtWookie

Joined Jul 17, 2007
22,210
I've seen it as the arc connecting two wires as well - but that's easily confused with the fuse symbol and the symbol for headphones.

I've also seen them drawn as:
Rich (BB code):
-------->>---------------<<-------
2J5              5J2
(the dashed line is actually solid in the diagram; this is just crude ASCII graphics)

I like beenthere's suggestion.

If the jumpers were removeable (like those for selecting a disk drive's master/slave/etc) I'd suggest using a SPST switch, but labeling it as JPnn, as this would make it easier to run PSPICE simulations.