Correct labelling beside DC socket?

S

Steve S

Guest
What is the correct symbol that should be next to a DC socket that takes a
barrel type plug from a wall wart power supply? I've seen a dotted line
above a continuous line and also the other way around (dotted *below*
continuous line).

Could someone tell me which way around is correct please? Or are both
equally correct?

Thanks,
Steve
 
Steve S wrote:
What is the correct symbol that should be next to a DC socket that
takes a barrel type plug from a wall wart power supply? I've seen a
dotted line above a continuous line and also the other way around
(dotted *below* continuous line).

Could someone tell me which way around is correct please? Or are both
equally correct?

Thanks,
Steve
Click to expand...
You can choose whatever you like, there is no common convention or
specification AFAIK. Mr. Woodgate will correct me if I'm wrong. Maybe a
semi-circle for the outer conductor is intuitive. The same socket can also
be used for low voltage AC supply BTW, in which case the polarity won't
matter.
--
ciao Ban
Bordighera, Italy
 
"Steve S" <me@privacy.net> wrote in message
news:js_wd.453$Q72.38@newsfe1-win.ntli.net...
What is the correct symbol that should be next to a DC socket that takes a
barrel type plug from a wall wart power supply? I've seen a dotted line
above a continuous line and also the other way around (dotted *below*
continuous line).

Could someone tell me which way around is correct please? Or are both
equally correct?
Click to expand...
Things that use those plugs usually have a polarity symbol next to the
socket. I'd copy one of those.

Leon
 
The circle and dot show the polarity. That is intuitively simple.

A single bold straight line shows it expects to be fed with a regulated supply.
A bold line paralleled with a dotted line shows it expects to be fed with an
unregulated supply with a nominal voltage as written..

I have seen the dotted line above and below the solid line.

Gibbo
 
"ChrisGibboGibson" <chrisgibbogibson@aol.com> wrote in message
news:20041218140433.06541.00001623@mb-m24.aol.com...
The circle and dot show the polarity. That is intuitively simple.

A single bold straight line shows it expects to be fed with a regulated
supply.
A bold line paralleled with a dotted line shows it expects to be fed with
an
unregulated supply with a nominal voltage as written..

I have seen the dotted line above and below the solid line.

Gibbo
Click to expand...
Thanks Gibbo. I'm using unregulated DC so from what you and others have said
either way around is fine. I've got the circle and dot arrangement in place
to indicate polarity too.

Steve
 
Subject: Re: Correct labelling beside DC socket?
From: John Woodgate jmw@jmwa.demon.contraspam.yuk
Date: 12/18/2004 1:45 PM Central Standard Time
Message-id: <B7ilYTGajIxBFwUf@jmwa.demon.co.uk


The OP appears to be asking for the symbol for 'DC', not for the
connector. The ISO/IEC symbol has the dotted line below the sold line.

The symbol for the connector is indeed a '-C' for the outer contact,
with an 'o-' embedded in it for the inner contact. It's a symbol that's
difficult to simulate compactly in ASCII art.
--
Regards, John Woodgate, OOO - Own Opinions Only.
Click to expand...
--- (DC)
/ \ -------
| - - - -
| O------------
|
\ /
---
|
o------------
|
===
GND
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

You're right -- not compact at all. (;-)

Chris
 
I read in sci.electronics.design that CFoley1064 <cfoley1064@aol.com>
wrote (in <20041218151022.08318.00002453@mb-m04.aol.com>) about 'Correct
labelling beside DC socket?', on Sat, 18 Dec 2004:

You're right -- not compact at all. (;-)
Click to expand...
You can do a bit better than that:

_
/ \
----| o----
\_/

.... but it's hardly elegant.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
Steve S wrote:

What is the correct symbol that should be next to a DC socket that takes a
barrel type plug from a wall wart power supply? I've seen a dotted line
above a continuous line and also the other way around (dotted *below*
continuous line).

Could someone tell me which way around is correct please? Or are both
equally correct?
Click to expand...
Those markings relate to the supply not the connector.

I see John Woodgate's reply pretty much replicates what I was about to say.

If you're designing something to take a wall wart - please put a diode bridge
after the socket so that it's not polarity sensitive. It's such a pain
otherwise. Better still, add a reservoir cap so it'll run off AC or DC !

Graham
 
ChrisGibboGibson wrote:

The circle and dot show the polarity. That is intuitively simple.
Click to expand...
They do ?

Curious that some wall warts are supplied with a polarity reverser then !


A single bold straight line shows it expects to be fed with a regulated supply.
A bold line paralleled with a dotted line shows it expects to be fed with an
unregulated supply with a nominal voltage as written..

I have seen the dotted line above and below the solid line.
Click to expand...
Intuitively that would seem to suggest polarity to me. I would expect the general
public to uderstand though.

If the socket isn't polarity insensitive, I'd mark it clearly with a plus and minus
symbol next to the connector.

Graham
 
On Sat, 18 Dec 2004 19:45:30 +0000, the renowned John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

The symbol for the connector is indeed a '-C' for the outer contact,
with an 'o-' embedded in it for the inner contact. It's a symbol that's
difficult to simulate compactly in ASCII art.
Click to expand...
I like this one, which is very clear, if you have the room for it.
They don't show the symbol for DC-out on this adapter.

http://www.speff.com/adapter_label.jpg
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top