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Oli Glaser wrote:

> Evening all, I am enjoying Kicad - so far so good. I thought I would
> start changing the libraries a bit to standardise things. Anyway, I
> got around to the power net symbol and it is of the "small line with
> a circle" type. I usually use the T shaped version. This got me
> wondering what was what standard wise. I opened my copy of ANSI IEEE
> Std 315 (1975) and I couldn't find any guide for such a symbol,
> though there is one for e.g. a ground circuit return. A quick glance
> on the net didn't bring much up either, lots of tables with
> everything but power net symbols. It's no big deal, but I would like
> to conform to a standard as much as possible, as far as reference
> designators and symbols go. So - what is the standard symbol for a
> power net? or what do people prefer?

I don't know about any standard.=20

I use the triangle for circuit ground, even though I got used early to
the T-shape for circuit ground. It stands out better, and I use the T
for other purposes.

I think the triangle shape that is without outline but with several
horizontal lines (4?) is commonly used for earth ground, and probably is
somewhere standardized.=20

I use the T-shape for power nets, together with a label that indicates
the voltage. The reason is that it's increasingly rare that a circuit
has only one power net; there are 5V and 3.3V and analog supplies etc.,
and that I wanted a symbol that goes nicely with a label for those.=20

I use the ground triangles always pointing down, and the power net T's
always pointing up (that is, just like the letter T), with the label
above. See attachment.

Gerhard=

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