> This is first attempt with a surface mount PCB, I may have been
> approx half a second soldering each pin of the FT232, was that to
> long, could I have damaged the chip ???

That shouldn't be a problem.

Andrew

>
> Thanks
> Regards Andy.
>
>
>
> --- In sprog-dcc@..., "andrew_croslanduk"
> <andrewcrosland@> wrote:
> >
> > Andy,
> >
> > --- In sprog-dcc@..., "Andy" <andy2000@> wrote:
> > >
> > > Hi Group
> > >
> > > I have just part built my SPROG kit. upto the USB testing
section.
> > > unfortunately I struggling. two separate issues I think ??
> >
> > They are probably related. In case anyone isn't aware, the kit
> > version is only available, to members, from MERG and is a
slightly
> > older (but fully compatible) version.
> >
> > >
> > > 1)
> > > My computer does not always recognise that the SPROG is
attached,
> > but
> > > seems to be more reliable when i increase Vin to 17 to 18.5v.
but
> > > still temperamental !!!
> >
> > Vin should not make any difference, check thoroughly around the
> > voltage regulators (the LM317 and the 78L05).
> >
> > >
> > > 2)
> > > Once recognised (not sure if this is normal) windows xp
responds
> > with
> > > yellow box in bottom right corner :-
> > >
> > > "USB Device Not Recognized"
> > > "One of the USB devices attached to this computer has
> > malfunctioned"
> > > ".........."
> >
> > Windows knows that you have connected something to the USB but
> cannot
> > complete the enumeration to identify exactly what, and load the
> > appropriate drivers. The former is a result of detecting the
change
> > in bus loading, the latter by communicating with the device.
Double
> > (and triple :-)) check component values and soldering around the
> > FT232 and the passive components between it and the USB
connector.
> If
> > the 5V is out of spec, that would certainly be an issue. Also try
> the
> > troubleshooting app note AN232-02 from FTDI, although that
assumes
> > access to an oscilloscope.
> >
> > Hope this helps,
> >
> > Andrew
> >
>