I have a multimeter with Hfe function, but didn't bother to check them,
as I looked in the datasheet and I took from there (wrong, because of my
mistake). But now for the future, I will both check the datasheet and
measure the transistors, and as for the diodes, double check before
soldering them :)

Lucian

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jinx
Sent: 19 mai 2004 14:25
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] Transistor Problem

> Thank you for making clear for me this very important issue !

Haha, you had me wondering there for a minute. "Hmmm, what
did Lucian see that I missed ?". Now, the tricky bit is when data
from different sources suggest a choice of two or more pin-outs.
The base is easy to find. Google for "testing transistors"

eg http://ourworld.compuserve.com/homepages/g_knott/elect56.htm

A multimeter that can measure Hfe is very useful, as a transistor that
may appear OK resistively may have low gain and not work properly.
Although one of my meters doesn't guarantee against damage if the
transistor is incorrectly orientated in the socket, so I don't use that
one
on unknowns

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