ComputerVoltageSources

Yes, two parts are SMT.  The DAC8420FPZ from Digikey in a DIP16 
package is $38.64.  The TI parts in SMT are less than half that cost 
and better specs.  The Analog Devices AD5726YRWZ is about half the 
cost of the TI parts with nearly the same specs so there is a 
considerable cost delta between the Analog Devices SMT and the DAC8420 
DIP part.  I haven't yet been able to find the Analog Devices part 
through common distribution yet.

If someone were to relay out the board, they could include the DIP 
parts for flexibility but the SMT part isn't that hard to solder.  It 
is 0.05 inch pitch, so only half that of a DIP part.

I just use my Weller soldering iron with a fine tip and small solder.  
I use a bit of masking tape to hold the part roughly in place and 
solder opposite corners.  I remove the tape, then reflow each corner 
to better alighn the part.  Once it is aligned, it's pretty easy with 
a set of magnifying headset to solder each pin.  If you bridge, solder 
wick will easily remove the excess.  It's pretty easy.

Dave


--- In ComputerVoltageSources@yahoogroups.com, "Larry T." <larry@...> 
wrote:
>
> Hmmmm.....
> 
> I see SMD!  Time to find some SMD tips for my Edsyn 951SX soldering
> station!  I can't wait for a board!  Now if I just had the funds to 
do
>  a massive parts buy so I could get started right away!
> 
> Larry T.
> 
> p.s. THANKS DAVE!!!!!!!!!!!!!!!!!!!!!
> 
> --- In ComputerVoltageSources@yahoogroups.com, "Grant Richter"
> <grichter@> wrote:
> >
> > You can see the finished layout at:
> > 
> >
> http://launch.ph.groups.yahoo.com/group/ComputerVoltageSources/
photos/view/26aa?
> > b=6
> > 
> > --- In ComputerVoltageSources@yahoogroups.com, "Larry T." <larry@>
> wrote:
> > >
> > > Hi Everyone
> > > 
> > > With all of the great work Dave has been doing lately, I have 
one VERY
> > > pressing question:
> > > 
> > > WHAT IS THE STATUS OF THE PSIM REPLACEMENT THAT WAS BEING
> DEVELOPED HERE?
> > > 
> > > I'd very much like to build one, but there is no chance in h... 
if
> > > getting an actual PSIM, so the only option is the board that was 
being
> > > developed here.  What happened to that development?  Is someone
> > > breadboarding a test version?  Will there ever be a PCB for 
sale?  Or
> > > even a known working PCB that we can get the files for in order 
to
> > > have them made?
> > > 
> > > Please, I have no design skills and I am dependent on those that 
do. 
> > > Once the designs are done, I can order boards and parts and 
build the
> > > thing with no problem.
> > > 
> > > Larry T.
> > >
> >
>