Homebrew PCBs

From: Gaurav Verma <gaurav.verma.mca@...>
Date: Sat, Sep 19, 2009 at 10:15 PM
Subject: Re: [Electronics_101] Re: First PCB made, attempt = unsuccesful,
some leasons learnt some questions
To: Electronics_101@yahoogroups.com


Hi Thanks a ton everyone, I will retry an attempt probably tomorrow or next
week depends if the shops are open on sunday... I am most grateful for all
the help


On Sat, Sep 19, 2009 at 8:36 PM, dave_mucha <dave_mucha@...> wrote:

>
>
> check e-bay for carbide PCB drills.
>
> you absolutly MUST use a drill press with carbide pcb drills. they are
> fragile.
>
> I use 0.02" for resistors and such.
>
> 0.04" for T-220 packages and dip chips.
>
> If you need to do a large DIP chip of 14 or more pins, considder getting a
> machined carrier and drilling out the holes.. you can drill your first two
> holes on the pcb, place your carrier over it and use paper clip wire to
> align it.
>
> I highly recomend you make a custom pad. tiny hole, large ring. when you
> etch, the hole should be small. it will help keep your drill more in the
> center.
>
> dremel makes a nice drill press for your dremel, btw.
>
> Dave
>
> --- In Electronics_101@yahoogroups.com <Electronics_101%40yahoogroups.com>,
> "leon Heller" <leon355@...> wrote:
> >
> > ----- Original Message -----
>  > From: "Gaurav Verma" <gaurav.verma.mca@...>
> > To: <Electronics_101@yahoogroups.com <Electronics_101%40yahoogroups.com>>;
> <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>>
> > Sent: Saturday, September 19, 2009 10:04 AM
> > Subject: [Electronics_101] First PCB made, attempt = unsuccesful, some
> > leasons learnt some questions
> >
> >
> > > Hi
> > > I tried to make my first PCB. It didnt work out. It was the ugliest PCB
>
> > > ever
> > > made :-(
> > >
> > > I used toner transfer method.
> > >
> > > What I learnt.
> > > 1. Dont print the image too dark or else while using the electric press
>
> > > the
> > > whole thing will spill.
> > >
> > > Mistakes I made
> > > 1. The wholes I drilled were too big
> > > 2. The artwork contains the outlines of the IC and though they are
> > > seperated
> > > in the image during toner transfer they overlapped I think because of
> > > extra
> > > dark copies.
> > >
> > > Questions
> > > 1. What is the drill bit size I should use?
> > > 2. What is the darkness level I should use?
> >
> > Your PCB program should tell you the correct drill size for the various
> > holes. I use 0.7 mm and 1.0 mm most of the time.
> >
> > Leon
> >
>
>  
>



 --
Gaurav Verma
Email - Gaurav.Verma.MCA@...
Phone - 9910732960



-- 
Gaurav Verma
Email - Gaurav.Verma.MCA@...
Phone - 9910732960


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