ComputerVoltageSources

I always hoped someone would take my design, do it on a larger format, 
add dual parts (DIP and SMT) for the DACs, and make it more buildable. 

However, the DIP parts are considerably more expensive.  DAC8420's are 
$45 each at Digikey. The TI7714UB is $18 at Digikey, so that is $54 
savings by using the SMT.  I believe the target for the AD5726 is 
something in the $8 range for ~$74 savings.  That's sure worth a try 
to solder SMT.

Remember, the pitch on this SMT part is only half that of a DIP - 0.
050".  If you can hold your hand steady, see it, and have a fine tip 
soldering iron, then it is quite doable.  If you bridge (I have just 
once), solder wick cleans it right up.

Dave


--- In ComputerVoltageSources@yahoogroups.com, "Samppa Tolvanen" 
<samppa.tolvanen@...> wrote:
>
> Hi,
> 
> On 8/2/07, Eric Brombaugh <ebrombaugh@...> wrote:
> >
> >
> >  I assume that the proprietary SW you're talking about
> >  is the BasicATOM development environment and
> >  interpreter?
> >
> 
> Ah, no: Using ExpressPCB - Design is tied to their service, which
> means, for gerbers (ect.) layout has to be done again with some 
other
> software.
> 
> The layout itself is good - thanks Dave! It might not be suitable 
for
> the first project to build, but it's not that complicated, SMTs are
> reasonable and lots of repetitive stuff in input buffers.
> 
> CVS has a good backing with existing PSIM software - and there isn't
> really an alternative, it would have to be created.
> 
> Samppa
>