Confusing Capacitor Symbol

[jim.dhillon]

Hi All!
I am viewing an electronic circuit diagram and the capacitor symbols
are very confusing: There are only two types of symbol for capacitor
used on this diagram.
The first is the regular two lines perpendicular to the connection..
something like this -||-

The second is -|[]- where [] is a rectangular box outline not
shaded in.. is this a polarized cap? There is no plus symbol on this
capacitor. The box is connected to the positive power lead. The value
is given as 2200uF.. this diagram originated from UK.. is this a
European standard or something?

regards, Jim

[Pctchrisgibson]

>The second is -|[]- where [] is a rectangular box outline not
>shaded in.. is this a polarized cap? There is no plus symbol on this
>capacitor. The box is connected to the positive power lead. The value
>is given as 2200uF.. this diagram originated from UK.. is this a
>European standard or something?
>

Yes, completely standard over here. As you surmise, the empty box is positive.
The other side is usually the same size but filled in with ink (or electrons if
it's on a screen).

Chris

I'm sure you can work out the reference to xollob in the email address is an
anti spammer and not an insult !

[Bill in Colorado]

Actually, I thought the parallel lines were only "legal" for relay contacts
now, and --|(---
is the symbol for *any* capacitor nowadays (polarized or not). (Ever since
the I.E.E.E. tried to straighten us out some time agao, since they knew
best).

[Leon Heller]

"jim.dhillon" <jim.d...@cibc.com> wrote in message
news:b7f10496.02051...@posting.google.com...

Yes, the 'box' symbol is a polarised cap. The box is +ve. This is common in
Europe.

Leon
--
Leon Heller, G1HSM leon_...@hotmail.com
http://www.geocities.com/leon_heller
Low-cost Altera Flex design kit: http://www.leonheller.com