On Jan 29, 2007, at 9:03 PM, DJ Delorie wrote:
I agree 100% here...I actually find through-hole soldering to be
more difficult and tedious than SMT now. All but the very tiniest
SMT parts can be soldered with a quality iron.
Hey, *I* can solder even the tiniest ones. You get your challenge
One of my vendors has a tool which uses a vacumn on a robotic arm to
grab the back of a device. Then they move the device over a container of
very sticky flux and lower it down until the bottoms of the balls just
bearly touch the flux.
The tool then moves the device over the fab and they position
> Are you using one of the syringes that is pressure driven with a
> foot pedal valve? Or are you using a sharp toothpick?
I'm using a hand-pressure syringe from stencilsunlimited.com. I press
just enough to get a concave bit of paste peeking out of the nozzle,
then tap it on the pads.
If I tr
DJ Delorie wrote:
What diameter solder wire do people use? I was using a bent, pointy
metcal iron with an 0.5mm ish tip, and 0.5mm solder wire. (Some lead,
tin and copper alloy). I found that the solder balls up on the end of
the wire to the point where it can dwarf an 0402's contact pad.
I u
Peter Clifton wrote:
On Mon, 2007-01-29 at 21:03 -0500, DJ Delorie wrote:
I agree 100% here...I actually find through-hole soldering to be
more difficult and tedious than SMT now. All but the very tiniest
SMT parts can be soldered with a quality iron.
Hey, *I* can solder even the
> I just built one... on 01005 disappeared with a "ping" of my tweezers
> (the tips of which actually dwarfed the component).
They've been re-christened "quantum capacitors" already.
> Still.. I cheated anyway, was using a x20 Binary microscope, x40
> sometimes
I use a x10 visor and x200 micros
On 1/29/07, Peter Clifton <[EMAIL PROTECTED]> wrote:
What diameter solder wire do people use? I was using a bent, pointy
metcal iron with an 0.5mm ish tip, and 0.5mm solder wire. (Some lead,
tin and copper alloy). I found that the solder balls up on the end of
the wire to the point where it can
On 1/29/07, Jeremy Pedersen <[EMAIL PROTECTED]> wrote:
So it's possible to hand solder or reflow these things at home? Better yet,
can you do double sided SMT boards? I always thought you coudn't do it
because you would have to have components touching the surface of the reflow
skillet on one sid
> So it's possible to hand solder or reflow these things at home?
Yup. See http://www.delorie.com/pcb/hotplate/ for a photo of my
hotplate.
> Better yet, can you do double sided SMT boards? I always thought you
> coudn't do it because you would have to have components touching the
> surface of
On 1/29/07, Jeremy Pedersen <[EMAIL PROTECTED]> wrote:
So it's possible to hand solder or reflow these things at home? Better yet,
can you do double sided SMT boards? I always thought you coudn't do it
because you would have to have components touching the surface of the reflow
skillet on one sid
On Mon, 2007-01-29 at 21:03 -0500, DJ Delorie wrote:
> >I agree 100% here...I actually find through-hole soldering to be
> > more difficult and tedious than SMT now. All but the very tiniest
> > SMT parts can be soldered with a quality iron.
>
> Hey, *I* can solder even the tiniest ones. You
So it's possible to hand solder or reflow these things at home? Better yet,
can you do double sided SMT boards? I always thought you coudn't do it
because you would have to have components touching the surface of the reflow
skillet on one side while the other side was supposed to reflow. Also, am
>I agree 100% here...I actually find through-hole soldering to be
> more difficult and tedious than SMT now. All but the very tiniest
> SMT parts can be soldered with a quality iron.
Hey, *I* can solder even the tiniest ones. You get your challenge
board working yet? ;-)
_
On Jan 29, 2007, at 7:51 PM, Mark Rages wrote:
Unfortunately space is at a premium in laser tag guns, so
hopefully I can
make it work. I'm not sure I'd even want to attempt an SMT board
at home.
Reflowing sounds a bit tricky.
Hand-soldering SMT isn't bad, unless its the real teensy-tiny SMT
On Jan 29, 2007, at 8:00 PM, John Luciani wrote:
If I only need a few (3-6)
MOSFETS, short of calling and asking for sample parts, what can I do?
If you have a school email address you can get free (or very low-
cost) samples
from almost any semiconductor manufacturer. For MOSFETs I would try
On 1/29/07, Jeremy Pedersen <[EMAIL PROTECTED]> wrote:
If I only need a few (3-6)
MOSFETS, short of calling and asking for sample parts, what can I do?
If you have a school email address you can get free (or very low-cost) samples
from almost any semiconductor manufacturer. For MOSFETs I would
On 1/29/07, Jeremy Pedersen <[EMAIL PROTECTED]> wrote:
Unfortunately space is at a premium in laser tag guns, so hopefully I can
make it work. I'm not sure I'd even want to attempt an SMT board at home.
Reflowing sounds a bit tricky.
Hand-soldering SMT isn't bad, unless its the real teensy-tiny
> Unfortunately space is at a premium in laser tag guns,
All the more reason to go with SMT :-)
> I'm not sure I'd even want to attempt an SMT board at home.
> Reflowing sounds a bit tricky.
You can solder them with an iron too, if the tip is small enough. I
use either an iron or a reflow hotp
Unfortunately space is at a premium in laser tag guns, so hopefully I can
make it work. I'm not sure I'd even want to attempt an SMT board at home.
Reflowing sounds a bit tricky.
Oh. I haven't met the guy yet. However, there is a machine shop here at
school and I know the teacher who runs it. Per
On 1/29/07, Jeremy Pedersen <[EMAIL PROTECTED]> wrote:
A drill press? If that's how it needs to be done, I happen to live next to a
machine
shop, so I can probably ask them to drill the holes.
Unless you are good friends with one of the machinists they may charge
you more to drill the holes t
> Right. So the toner transfer method sounds like the one I ought to
> try. Is it fairly accurate for two sided boards? I'm assuming you
> guys mostly make two sided boards, so I suppose that's a yes, but I
> thought I'd ask anyway.
Actually, most of my boards are primarily SMT, so the ones I mak
Yes, I must have meant auto-place, which is a feature I have yet to try.
Right. So the toner transfer method sounds like the one I ought to try. Is
it fairly accurate for two sided boards? I'm assuming you guys mostly make
two sided boards, so I suppose that's a yes, but I thought I'd ask anyway.
_
>
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Pedersen
> Sent: Monday, January 29, 2007 2:00 PM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: I need to open and print a PCB created in
> ExpressPCB:What are my options?
>
>
>
actually ended up making new footprints for every part on
the board.
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jeremy Pedersen
Sent: Monday, January 29, 2007 2:00 PM
To: gEDA user mailing list
Subject: Re: gEDA-user: I need to open and print a PCB created in
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