I found this... http://www4.tpg.com.au/users/talking/TaxiPhonePage1.html

HTH
----- Original Message -----
From: "Nick Masluk" <mistertippy@YAHOO.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: 30 July 2001 02:08
Subject: Re: [PIC]: DTMF Generation


> Nope....  Also took all antistatic precautions.  And
> the power supply I used was a 12v 500mA positive
> center, it is totally compatable with the device.
>
> --Nick
>
>
> --- Olin Lathrop <olin_piclist@EMBEDINC.COM> wrote:
> > > and when I power it up the microcontroller on
> > > the stamp and the 5 volt regulator start burning
> > up
> > > (with nothing attached except the power supply and
> > PC
> > > serial link).
> >
> > Plugged in backwards possibly?
> >
> >
> >
> ********************************************************************
> > Olin Lathrop, embedded systems consultant in
> > Littleton Massachusetts
> > (978) 742-9014, olin@embedinc.com,
> > http://www.embedinc.com
> >
> > --
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