Once upon a time I used to wear a sweater at my bench.  This was fine until
winter, when the humidity went to zero.  I'd program a PIC, it would work
properly about 2 or 3 times, then fail.  kaZAAP!

You'll catch such EOS related failures if you operate your product for a few
minutes, IMHO.  Other than that, I'd agree with the paint
shaker/oven/freezer concept, plus a variac or DC powert supply to turn the
juice up and down between the specified limits.  The military doesn't do
much more than this AFAIK, although they burn-in for days on end.

If your products are like mine, solder problems are the biggest bugaboo, and
they will show up with vibration or temperature extremes.

--Lawrence


----- Original Message -----
From: "Douglas Butler" <dbutler@IMETRIX.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, November 28, 2001 8:32 AM
Subject: Re: [OT]: burn in time


> I was hoping someone else had a GOOD answer.  But as no one else has
> replied...
>
> In my experience time has little to do with it.  Temperature and
> vibration are what kill my products.  I would put it on a paint shaker
> and test every feature at both temperature extreems, maybe electrical
> extreems, then call it done.
>
> Sherpa Doug
>
> > -----Original Message-----
> > From: David Dunn [mailto:ddunn@TCAINTERNET.COM]
> > Sent: Tuesday, November 27, 2001 1:35 PM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [OT]: burn in time
> >
> >
> > anybody here have info on how long a gadget needs to "burn
> > in" / test to decide it's indeed a good part
> >
> > i have a device, 16F877, a comparator, 7805, 20x4 char LCD,
> > and some misc descrete parts, just need to know how long to
> > test them before i ship
> > them to customers.
> >
> >
> > thanks for you ideas,
> >
> >
> > DLD
> >
> > --
> > http://www.piclist.com hint: PICList Posts must start with ONE topic:
> > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
> >
> >
> >
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics