I recentrly killed one by trying to AD convert something that shouldn't have
been.
It were three wires connected to something completely different (a set of
relay
switches) and it shorted the circuit. The PIC got fried and it died shortly
after.
On top of it all, it burned out two tracks on my PCB, so than one could
almost
be tossed out. Fortunately, those tracks were the reference voltage
regulators,
so a new PIC was still able to handle the AD conversion by turning off the
reference voltages and using the regular voltage for AD conversion.

To make it short, it was pretty obvious it died.

-----Oorspronkelijk bericht-----
Van: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]Namens Philip Pemberton
Verzonden: Thursday, June 13, 2002 11:50 AM
Aan: PICLIST@MITVMA.MIT.EDU
Onderwerp: Re: [PIC]: how to check if a pic is broken? any experience?

The only reason I managed to kill two of my PIC16F874s is because my RS232
linedriver was spiking MCLR below ground when the bootloader software issued
a reset. A BC547 transistor and a few resistors cured that slight problem.
The PICs appear to be stone dead though...

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