Antti Lukats wrote:
>
> At 12:10 AM 14/8/97 -0800, you wrote:
> >David BALDWIN <David BALDWIN <PICLIST@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         www.avrbasic.com          Born for Basic
>
> Grand opening in August.
> Watch out for first week offers.

Anybody tried Microwave ovens ??? ;-)

Nic