Hi Lucian
We use Orcad in my company, but we built our one libraries from the Orcad
ones. we did this for every part we needed. This was very time consuming at
the beginning but it pays off as the libraries in Orcad are full of errors.
now we just keep on adding new parts as we need them.
best regards
                Luis

-----Original Message-----
From: Lucian [mailto:luciffer@HOME.RO]
Sent: 18 May 2004 08:37
To: PICLIST@mitvma.mit.edu
Subject: Re: [EE]: Transistor Problem


The first time, indeed, was with some diodes, but here neither was my
fault. Orcas oriented them in that direction, and I never thought to
doubt Orcad. But these lessons are learned for the future.

Lucian

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jinx
Sent: 18 mai 2004 02:31
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Transistor Problem

> I have managed to change all the 11 transistors and it proved that
> they were CBE instead of EBC. From now on, I will measure every
> transistor I solder to avoid the pain of getting them off and
inverting
> them

Spehro said -

"the BC547 has the Euro pinout, which is the reverse of the US pinout"

I don't think I've ever encountered a BC54x (or many other common
BC types, eg BC33x) that isn't CBE, looking at the face (label), and
wasn't aware that there's a difference with US transistors. Spehro,
did you mean that there's a US pinout for the BC range or were you
talking about transistors in general ?

Lucian, I notice that you've twice had to alter the orientation of
components, and both times you've mentioned the nuisance of
having to do that. Not trying to get in your face, really, but wouldn't
it be sensible to do a test first and get one right before installing
a lot of components back-to-front ?

"There's never enough time to do it right, but there's always enough
time to do it again"

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