Hans,
I just did a Hybrid board. It uses a 7486-7474 and a L298. It
is a single sided board. There is a need for a cheap controller that
will run four wire motors. Suddenly there is a shortage of 6 wire
unipolar motors. Just remember, printer cartridges are $31, NFL hats
are $29 but a PCBoard should only be $10.
John
--- In Homebrew_PCBs@y..., hans@c... wrote:
> John,
> Thanks... I published the design for that very reason, I needed to
> replace some crap electronics that came with the mill and turned to
the
> data sheets and did it from there... with 20/20 hind site I could
re-do
> it and improve many features.
> I have no problem with simpler designs, they have a place, trouble
is
> people out grow them very quickly...:-)
> A while back I sent out a questionnaire asking a bunch of people
what
> they were willing to pay for a "good" set of boards, by good, I mean
> solder mask and silk screen. Eventually I got 100% replies and the
> result was the average they were willing to pay was in the order of
$10
> per board...
> Well I can make them for less, but I can't pack and ship and keep
books
> and pay taxes for a simple $2-5 per board, I find my time is worth
a lot
> more than that, so I published it free of charge.... It costs me to
do
> that, and I have at least 5 cries for help every week ( I reply to
all
> of them )... That's the reason I want to re-do the layout, perhaps
the
> e-mail's will be less...
> Anyway, as I said when I get time I will re-do the layout, PIA the
PCB
> layout program I used to use is fine, but I moved onto (via the crap
> Easy PC, I never did sell it on eBay !) to EAGLE and find it to be a
> very good program. BTW they now have a cheaper version for Hobby
users
> that does not restrict as much as the freee version.
> I tend to agree with you outlook on design for the home/hobby
person,
> make it from stuff that can be gotten at Home Depot...
>
> Anyway... I'm still interested in a simple way to through hole
plate two
> sided PCB's.... Every thing suggested so far has been a nightmare of
> chemicals...
>
> Best Regards
> Hans W
>
> crankorgan wrote:
>
> > Hi Hans,
> > I have you listed on my links. I sent a few people your
way.
> > They come back saying they want a simpler design or a premade
board. I
> >
> > won't get into the people who want a kit!
> > You were the first person on the net to list a L297/L298
> > design. Now there are lots of copycats.
> >
> > John
> >
> >
> >
> > --- In Homebrew_PCBs@y..., hans@c... wrote:
> > > crankorgan wrote:
> > >
> > > > What I find is people are unable to find anything on
> > > > the internet. Maybe they use the wrong search engine.
> > >
> > > I posted a complete design with PCB layout files and schematics
at
> > my
> > > web site, during
> > > the past years I have received 100's or emails from people that
have
> >
> > > successfully built the
> > > Modular Design, with or without the "Smart Current Monitor".
> > >
> > > The design is Free... I do not charge anything for it..
> > >
> > > When I get time I'm going to post a new design complete with
EAGLE
> > > files...
> > >
> > > Hans W
> > > http://hans-w.com
> > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> >
> >
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