Hi Hans,
I am in New Jersey. The area I am in is very populated. Any
type of problem causes the area to grid lock. I walk everywhere!
There was a laser site on the internet that has simple cutting
lasers. They are quite large. About 3 feet in length. One of those
deals where the laser stays still and the board does all the moving.
Maybe I will go looking again. If my sales ever go back up I will
get a batch of boards made. Right now I only make boards as they
are ordered. My booklets are done the same way. The last few days I
have been designing a homemade heatsink for the L298. I ended up
using three pieces of scrap aluminum that form a fan. My new board
has 2 relay drivers 5 inputs and four stepper motor outputs. I left
out the L297. I went with 7486s and 7474s to drive the L298. I wanted
a simple board for beginners. The current is set by resistors in
series with the motor. A very crude but effective BiPolar board.
John
--- In Homebrew_PCBs@y..., HW <hans@c...> wrote:
> John,
> Laser sounds interesting. I think what I would need is a source for
the
> laser and it's control electronics, the rest I can myself...
> Do you have any sources for reasonable priced cutting lasers ?
>
> Is that bridge in Texas ?
>
> Hans W
>
> crankorgan wrote:
>
> > Hans,
> > Texas has some good scrap plastic places. I got lucky,
> > there is a place that will sell me scrap within walking
> > distance. The catch is they took the bridge down to build a
> > new one. Now I have to go seven miles in each direction
> > out of my way. The car broke down twice in the detour
> > route. Now I buy on Ebay.
> > A year ago I was helping a guy build a laser powered
> > circuit board machine. Once he got the laser to fire and
> > cut the copper, then he disappeared! Maybe he pointed it the wrong
> > way.
> >
> > John
> >
> >
> >
> > --- In Homebrew_PCBs@y..., HW <hans@c...> wrote:
> > > Houston, Texas
> > >
> > > crankorgan wrote:
> > >
> > > > Hans,
> > > > Where are you located? Texas? I keep thinking Germany for
> > > > some reason.
> > > >
> > > > John Conrad Kleinbauer
> > > >
> > > >
> > > >
> > > > --- In Homebrew_PCBs@y..., HW <hans@c...> wrote:
> > > > > Thanks .. he has some good deals..
> > > > > hansw
> > > > >
> > > > > crankorgan wrote:
> > > > >
> > > > > > Hi Hans,
> > > > > > In Ebay, check out hman16 auctions. He is based
in
> > > > > > Florida. He sells scrap plastic.
> > > > > >
> > > > > > John
> > > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > >
> > > >
> > > > Be sure to visit the group home and check for new Bookmarks
and
> > files:
> > > >
> > > > http://groups.yahoo.com/group/Homebrew_PCBs
> > > >
> > > > To unsubscribe from this group, send an email to:
> > > > Homebrew_PCBs-unsubscribe@y...
> > > >
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> > Service.
> > >
> > >
> > > [Non-text portions of this message have been removed]
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and
files:
> >
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
> > To unsubscribe from this group, send an email to:
> > Homebrew_PCBs-unsubscribe@y...
> >
> >
> >
> > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.
>
>
> [Non-text portions of this message have been removed]