Hi Dennis,
As long as the board works for you, that is all that
matters. Ignore the criticism. Any pcb is better than
a rat's nest of wires.
If you are going to sell it, there are technical
aspects that should be considered.
The critism of the layout, is just normal 'artsy'
comments. PCB layouts are definitely more of an art
than a science, and everyone has a different opinion
of what looks best. Most people are just used to the
grid-like running of the tracks, which is easiest for
manufacturing.
TANSTAAFL!
Myc
--- sbdwag <
sbdwag@...> wrote:
> Len
>
> I am really just a grasshopper but the power supply
> circuit filters
> well and is very stable.
>
> http://www.wagsterstuff.com/photos/pssch.jpg
> http://www.wagsterstuff.com/photos/pspeg.jpg
>
> Thanks for your imput.
>
> Regards
> Dennis Waggoner
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, Len Warner
> <yahoo@...> wrote:
> >
> > At 15:22 06/02/17, sbdwag wrote:
> >
> > >f anyone has time please critique my first
> attempt<snip>
> > >Does anything stand out? All comments are
> appreciated.
> > >
> > >http://www.wagsterstuff.com/photos/psbd.jpg
> > >http://www.wagsterstuff.com/photos/psobj.jpg
> >
> > I don't mind the layout not being perfectly
> symmetrical.
> >
> > What I don't understand is why the negative output
> is
> > a model of good decoupling and the positive output
> > is quite the contrary.
> >
> > On the negative side, capacitors C6, C8 are
> directly on the
> > output track and on a large common ground island.
> >
> > On the positive side, capacitors C5, C7 are each
> on a stub
> > track off the output track and they are on
> separate ground areas.
> > These are split by the hooked track which runs
> between the
> > pads of both capacitors though there seems no
> reason why
> > it should since there is a direct path available.
> >
> > Also close to having isolated copper fill islands
> there too.
> >
> > As part of this layout style, three tracks seem to
> run to
> > a star point at the diode when what should happen
> is
> > that the output current track visit each
> decoupling
> > capacitor, thus eliminating the stub tracks.
> >
> > Caps C10, C9 could be closer to their Adjust pins,
> too.
> >
> > On the input side reservior caps C1, C2 are on
> stubs:
> > the rectifier output should be taken to the
> reservior
> > then the reservoir to the regulator Input.
> >
> > Wouldn't hurt to have C3, C4 on the current path
> too
> > but priority is to get them as close as possible
> to their
> > Input pins because they help guarantee regulator
> stability.
> >
> > Eliminate stubs, shorten current paths, minimize
> current loop areas.
> >
> >
> > Regards. Len Warner
> >
> >
> >
> > --
> > No virus found in this outgoing message.
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> > Version: 7.1.375 / Virus Database: 267.15.11/264 -
> Release Date:
> 06/02/17
> >
>
>
>
>
>
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