BC847 SMD pinout problem

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Kevin Redon kevredon at mail.tsaitgaist.info
Wed Jun 15 09:07:18 UTC 2011


Hi,

On 14.06.2011 23:18, Harald Welte wrote:
> Hi Kevin!
> 
> Can you please let me know how you entered/imported the BC847
> library/module for kicad?  Is it something you did yourself or imported
> from some public reference library?

error : pin 1 and 2 of BC847 are swapped
source : KiCAD way of doing footprint + wrong verification on my side
(must have used another NPN transistor or BC847 datasheet to check)
effect : the two BC847 NPN transistors are affected. the current flow in
the wrong direction
workaround : solder the BC847 upside down

in Kicad there is no footprint for BC847. the footprints are general.
I assigned the SOT23 footprint for BC847, but the footprint is only
about the pad size and position. It does not ensure the correct pin
assignment. I verified them wrong.

Kevin




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