[oopic] Re: Fried OOPic?

Mike, which board are you using and where did the 22V hit it? If you
have no voltage across 22 & 24, it sounds like the 5V regulator is
shot. If you have the S board, you can use an external 5V regulator
and connect it the ribbon cable 5V pin and ground pin. If the 22V hit
the 5V side of the regulator, odds are you fried the PIC and/or the
EEPROM. Replacement EEPROMs are on the order of $2 for a 32Kb and
$3.50 for a 64Kb (largest the OOPic will support). The reason I think
that the regulator is your problem is because typical failure mode for
a 7805 regulator is to open (i.e. everything will be grounded and you
will not see any voltage on the 5V bus). If by chance you are using
the S-board, that lieelt regulator cannot take much. The TO-220
package 7805 can handle a whole lot more (in fact you can run it off of
22V as long as you dont pull too much current on your 5V side).

--- In oopic@yahoogroups.com, "Mike Martin" <xaviour2me@...> wrote:
>
> Hi All
> I was doing a servo motor test routine and inadvertantly hooked up
the
> bench power supply for the servo to the rails on the breadboard I was
> using for my OOPic. It was set to about 22v. Now the compiler
can 'see'
> the cable but can't download anything anymore. I've got zero volts
> across pin 22 and 24 and can't get anything out of the prototyping
area
> either. Is it RIP OOPic?
> Mike M.
>

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