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PICList Thread
'[PIC]: toaster'
2001\02\27@174308 by Tony Nixon

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I think I fried my first PIC last night.

It was siting in a PCB running normally, but later I noticed a test LED
was only half lit.

I went to touch the 16F873 after removing power and heard a 'Tssst'
sound as the Microchip logo got branded into the tip of my finger. I'd
swear it was so hot, I could have lit a match off it.

The bootloader failed to work after that, so I assumed it was dead, but
after cooling off it worked again. For about 3 minutes, the PCB was
ticking like chrome exaust pipes cooling off. Unfortunately, the PIC
seems to run a bit warm now, so I don't think I'd trust it for work
anymore, especially not for development when you don't need a cranky
chip.

The problem:  A floating test lead with 12VDC wiggled it's way over to a
VCC test pin and made contact.

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Best regards

Tony

mICro's
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2001\02\27@181529 by Alice Campbell

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does it shake in fear now when you walk by?

when i attended the Microchip seminar, i wore as a lapel-pin
a 16f84 that i had toasted with injudicious application of
vpp.  inserting them backwards into a ckt is pretty
effective, too.

alice

{Quote hidden}

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2001\02\27@182738 by David Huisman

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Tony,

I have learnt that theses devices run on smoke.

As long as you don't let the smoke out, they run fine :)

Regards

David Huisman

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2001\02\27@192008 by Dal Wheeler

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I think devices run on light as well as smoke...

I remember creating a small lightbulb out of a windowed EPROM once doing
similarly careless things.  --Haven't done it with my 12c509\jw's yet, but
the day's not over yet.  :)

Hmmm...  I suppose if VPP were sufficiently adequate, we could supposition
that fire is also an operational element...  :'o

{Original Message removed}

2001\02\27@194140 by David Huisman

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Dal,

So you're saying our old smoke and mirrors approach is now out of date and
we need to ammend it to smoke, mirrors and light ?

Regards

David Huisman

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2001\02\28@010039 by Roman Black

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Tony Nixon wrote:
{Quote hidden}

Great! Someone was just asking for a PIC chip with
the minimum functionality! ;o)
-Roman

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2001\02\28@073235 by mike

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On Wed, 28 Feb 2001 09:43:41 +1100, you wrote:

>I think I fried my first PIC last night.
>
>It was siting in a PCB running normally, but later I noticed a test LED
>was only half lit.
>
>I went to touch the 16F873 after removing power and heard a 'Tssst'
>sound as the Microchip logo got branded into the tip of my finger. I'd
>swear it was so hot, I could have lit a match off it.
>
>The bootloader failed to work after that, so I assumed it was dead, but
>after cooling off it worked again. For about 3 minutes, the PCB was
>ticking like chrome exaust pipes cooling off. Unfortunately, the PIC
>seems to run a bit warm now, so I don't think I'd trust it for work
>anymore, especially not for development when you don't need a cranky
>chip.
>
>The problem:  A floating test lead with 12VDC wiggled it's way over to a
>VCC test pin and made contact.
I have seen the bond wires on a JW pic GLOW , and another which melted
itself into a plastic prototyping board, and both times had the chip
still work afterwards. This sort of thing gives a lot of confidence in
the PICs robustness, although not recommended in production!

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2001\02\28@082937 by Andy N1YEW

picon face
i stuck them in backwards (unintentionally) and they got hot but they still
work after.... unless the pins change color and there is a stench in thre
room

andy n1yew
Leet Slacker on AIM
{Original Message removed}


'[PIC]: toaster'
2001\03\02@130652 by Steve Smith
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Isn't 12v a bit out of spec for the vcc ?

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2001\03\02@133111 by Dennis Oliver

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I am new to this site, so are you saying ME LABS, and they have a menu
WINDOZE.

----- Original Message -----
From: "Steve Smith" <.....XYGAXKILLspamspam.....AOL.COM>
To: <EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU>
Sent: Friday, March 02, 2001 10:07 AM
Subject: Re: [PIC]: toaster


> Isn't 12v a bit out of spec for the vcc ?
>
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