> -----Original Message-----
> From: Picdude [SMTP:picdude@NARWANI.ORG]
> Sent: Thursday, June 12, 2003 8:05 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [PIC]: PIC Hardware failures.   Was: PWM on 16F62x problem?
>
> Pardon my comandeering of your thread, but since you mention hardware
> failures, I had a PIC 16F872 fail on me recently in an odd way ... RB0
> froze
> at logic "1".  I checked the circuit carefully, but did not find any
> shorts
> or other problems.  RB0 thru 4 drove the base of some 2N3906 transistors
> via
> 1k resistors.  So I just replaced the PIC, AND swapped the transistor with
>
> another.   But lo and behold -- after a couple days of use, this new one
> failed in the exact same way.  The third one never failed, but I have to
> wonder and possibly assume that there was some flaw during manufacture.
>
> Anyone seen these probs before?
>
> Cheers,
> -Neil.
>
I don't think I've ever managed to kill (or even injure) a PIC, despite some
good attempts.  What was the 2N3906 driving?

Mike


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