Truncated match.
PICList
Thread
'OTP erase'
1997\08\14@030453
by
David BALDWIN
Hello everybody,
I am going to try if OTP parts can be erased with radiations or X rays.
Does someone already tried this?
David
1997\08\14@031324
by
Andrew Warren
1997\08\14@044055
by
Antti Lukats
At 12:10 AM 14/8/97 -0800, you wrote:
>David BALDWIN <David BALDWIN <.....PICLISTKILLspam
.....MITVMA.MIT.EDU>> wrote:
>
>> I am going to try if OTP parts can be erased with radiations or X
>> rays. Does someone already tried this?
>
>David:
>
>Yes, someone has. Contrary to popular opinion, it doesn't work.
maybe not for PIC's but for most OTP memory it *does* work.
It takes a lotsa X-ray: a machine used for that purposes is left
working for 30..90 minutes at maximum power with the emitter head
few millimeters from the chip bodies.
The guy who has this machinery in his cellar said that all OTP
EPROM's have been erased. time*energy depends on manufacturer.
Also some Intel micros have been erased. He has not tried PIC's.
I would *not* advise to do such experiments in rural areas.
antti
No Limits Go To
Basics of AVR AVR
AVRBASIC http://www.avrbasic.com Born for Basic
Grand opening in August.
Watch out for first week offers.
1997\08\14@083441
by
Andy Kunz
>I would *not* advise to do such experiments in rural areas.
Why not in rural areas? Nobody around to see you glow... <G>
Has anybody tried nuclear sources, though? I mean, this part of the
country is known for uranium and radium deposits, so ...
Andy
==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
Hardware & Software for Industry & R/C Hobbies
"Go fast, turn right, and keep the wet side down!"
==================================================================
1997\08\14@084237
by
nvdw
|
Antti Lukats wrote:
{Quote hidden}>
> At 12:10 AM 14/8/97 -0800, you wrote:
> >David BALDWIN <David BALDWIN <
EraseMEPICLISTspam_OUT
TakeThisOuTMITVMA.MIT.EDU>> wrote:
> >
> >> I am going to try if OTP parts can be erased with radiations or X
> >> rays. Does someone already tried this?
> >
> >David:
> >
> >Yes, someone has. Contrary to popular opinion, it doesn't work.
>
> maybe not for PIC's but for most OTP memory it *does* work.
>
> It takes a lotsa X-ray: a machine used for that purposes is left
> working for 30..90 minutes at maximum power with the emitter head
> few millimeters from the chip bodies.
>
> The guy who has this machinery in his cellar said that all OTP
> EPROM's have been erased. time*energy depends on manufacturer.
> Also some Intel micros have been erased. He has not tried PIC's.
>
> I would *not* advise to do such experiments in rural areas.
>
> antti
>
> No Limits Go To
> Basics of AVR AVR
> AVRBASIC
http://www.avrbasic.com Born for Basic
>
> Grand opening in August.
> Watch out for first week offers.
Anybody tried Microwave ovens ??? ;-)
Nic
1997\08\14@084242
by
tjaart
Andy Kunz wrote:
>
> >I would *not* advise to do such experiments in rural areas.
>
> Why not in rural areas? Nobody around to see you glow... <G>
>
> Has anybody tried nuclear sources, though? I mean, this part of the
> country is known for uranium and radium deposits, so ...
Why not just turn them around and use the other side...(Just like
a vinyl LP record)
--
Friendly Regards
Tjaart van der Walt
tjaart
spam_OUTwasp.co.za
________________________________________________________
| WASP International http://wasp.co.za |
| R&D Engineer : GSM peripheral services development |
|Vehicle tracking | Telemetry systems | GSM data transfer|
|Voice : +27-(0)11-622-8686 | Fax : +27-(0)11-622-8973 |
| WGS-84 : 26010.52'S 28006.19'E |
|________________________________________________________|
1997\08\14@090323
by
Andrew Warren
1997\08\14@093732
by
Martin R. Green
|
I have read that some people have had success erasing OTP devices with very
high (industrial) levels of x-rays. Medical x-ray machines are designed
for minimum exposure, so they would not work (or would take a year to erase
a device), but one of the machines that, for instance, checks pipeline
welds for defects might do the trick. Of course, the radiation might fry
the logic circuits, but at least your device would be erased ;-)
CIAO - Martin R. Green
spamBeGoneelimarspamBeGone
bigfoot.com
----------
From: Andy Kunz[SMTP:TakeThisOuTmontanaEraseME
spam_OUTFAST.NET]
Sent: Thursday, August 14, 1997 8:31 AM
To: RemoveMEPICLIST
TakeThisOuTMITVMA.MIT.EDU
Subject: Re: OTP erase
>I would *not* advise to do such experiments in rural areas.
Why not in rural areas? Nobody around to see you glow... <G>
Has anybody tried nuclear sources, though? I mean, this part of the
country is known for uranium and radium deposits, so ...
Andy
==================================================================
Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865
Hardware & Software for Industry & R/C Hobbies
"Go fast, turn right, and keep the wet side down!"
==================================================================
1997\08\14@112221
by
Antti Lukats
>Has anybody tried nuclear sources, though? I mean, this part of the
>country is known for uranium and radium deposits, so ...
Yes experiments are made. most chips were fried before erase.
One 8751 style thing survived the erasure with some minor trouble
in logic circuitry.
antti
No Limits Go To
Basics of AVR AVR
AVRBASIC http://www.avrbasic.com Born for Basic
Grand opening in August.
Watch out for first week offers.
1997\08\14@114914
by
Norm Cramer
At 08:31 AM 8/14/97 -0400, you wrote:
>>I would *not* advise to do such experiments in rural areas.
>
>Why not in rural areas? Nobody around to see you glow... <G>
>
>Has anybody tried nuclear sources, though? I mean, this part of the
>country is known for uranium and radium deposits, so ...
>
Probably can't get the flux levels you would need. Maybe you could dig
some up, mail (UPS is on strike) it to Savanna River SC and let them enrich
it for you :-) Seriously though, the levels needed would require shielding
and control of the dose of radiation that you got.
An iteresting study would be to see what different sources of radiation
could cause the best erase. I would guess that a source that gave off
gamma's at about the same energy level as the UV light would work fine.
Wonder what kind of shielding the package adds?
Probably the best method would to be to etch a hole in the package and use
a light.
Norm
1997\08\14@195032
by
Eric Smith
Andrew Warren <fastfwdEraseME
.....IX.NETCOM.COM> wrote:
> You also can't erase PICs by putting them in a magnetic field,
> accelerating them to significant fractions of the speed of
> light, playing loud music at them, holding them under water,
> shaking them vigorously, or tapping on them with small hammers.
However, *sufficient* application of any of these methods will render it
impossible to determine whether the PIC is erased or not.
1997\08\14@195852
by
Andrew Warren
Eric Smith <EraseMEPICLIST
MITVMA.MIT.EDU> wrote:
> > You also can't erase PICs by putting them in a magnetic field,
> > accelerating them to significant fractions of the speed of
> > light, playing loud music at them, holding them under water,
> > shaking them vigorously, or tapping on them with small hammers.
>
> However, *sufficient* application of any of these methods will
> render it impossible to determine whether the PIC is erased or not.
Yeah... And the really neat thing is that you achieve the same
result whether you apply those methods to the PIC or to the guy
trying to erase it.
-Andy
=== Andrew Warren - RemoveMEfastfwdEraseME
EraseMEix.netcom.com
=== Fast Forward Engineering - Vista, California
=== http://www.geocities.com/SiliconValley/2499
=== For PICLIST help (including "unsubscribe" instructions),
=== put the single word "help" in the body of a message and
=== send it to: RemoveMElistservspam_OUT
KILLspammitvma.mit.edu
1997\08\15@020729
by
nigelg
1997\08\16@050616
by
Ian Raymond Douglas
|
For anyone thats interested, my mother-in-law will breathe on any otp's
you want erased for a small fee. We don't call her dragon's breath for
nothing! 8-)
On Thu, 14 Aug 1997, Andrew Warren wrote:
{Quote hidden}> Nic van der Walt <Nic van der Walt <
spamBeGonenvdwSTOPspam
EraseMEwasp.co.za>> wrote:
>
> > Anybody tried Microwave ovens [for erasing OTP PICs]???
>
> Uh, no.
>
> You also can't erase PICs by putting them in a magnetic field,
> accelerating them to significant fractions of the speed of
> light, playing loud music at them, holding them under water,
> shaking them vigorously, or tapping on them with small hammers.
>
> Surprising, huh?
>
> -Andy
>
> === Andrew Warren -
KILLspamfastfwdspamBeGone
ix.netcom.com
> === Fast Forward Engineering - Vista, California
> ===
http://www.geocities.com/SiliconValley/2499
>
> === For PICLIST help (including "unsubscribe" instructions),
> === put the single word "help" in the body of a message and
> === send it to:
EraseMElistserv
EraseMEmitvma.mit.edu
>
1997\08\17@011522
by
David Duffy
>For anyone thats interested, my mother-in-law will breathe on any otp's
>you want erased for a small fee. We don't call her dragon's breath for
>nothing! 8-)
Don't you mean the laser beam eyes that can kill a son-in-law at 10 paces ?
Every married man on the PicList will know what I mean ! :-)
More... (looser matching)
- Last day of these posts
- In 1997
, 1998 only
- Today
- New search...