> What is the diameter of the drill helper?
It's mindrill/2 so you can configure it through the DRC menu.
What you really need is some formula or table that gives
drill-specific diameters, since each drill is a different shape.
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DJ Delorie escreveu:
>
> That's what the drill helper *does*.
>
> But the copper is only 0.7 mil thick (1/2 oz) so a pin produces a much
> deeper starter spot.
What is the diameter of the drill helper? if it is too small, it will
not help much. For what I know the drill has a flat region in th
DJ Delorie wrote:
>> The hardest part is the 0.3mm vias in a drill press with no
>> alignment aids.
>>
>
> http://www.delorie.com/pcb/dremel-stand/
>
> although the dremel shaft itself has about 6 mil of play in it. I've
> tweaked the drill helper checkbox of the PS exporter to be more
> suit
> I used another trick (some... time ago): make your copper with a
> hole,
That's what the drill helper *does*.
But the copper is only 0.7 mil thick (1/2 oz) so a pin produces a much
deeper starter spot.
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DJ Delorie escreveu:
>> The hardest part is the 0.3mm vias in a drill press with no
>> alignment aids.
>
> http://www.delorie.com/pcb/dremel-stand/
>
> although the dremel shaft itself has about 6 mil of play in it. I've
> tweaked the drill helper checkbox of the PS exporter to be more
> suitab
> The hardest part is the 0.3mm vias in a drill press with no
> alignment aids.
http://www.delorie.com/pcb/dremel-stand/
although the dremel shaft itself has about 6 mil of play in it. I've
tweaked the drill helper checkbox of the PS exporter to be more
suitable for this particular use; in addi
> Lope De Vega wrote:
>
>
> I'm trying to build a circuit with a cp2102, which has
> 0.5 mm between pins' center (actually 0.2mm between
> pins). It is a qfn-28 package.
>
> I wanted to ask if anyone has had success with
> something similiar? my workflow would be printing the
> schematics as give
On Mon, Dec 03, 2007 at 11:24:36AM -0800, Dave N6NZ wrote:
>
> Randall Nortman wrote:
>
> The cheapest I've seen for 1 or 2 copies of a board with mask and
> silkscreen is batchpcb.com, by the SparkFun guys.
I've used them before. The board quality is top notch. If you need
many of a small de
On Monday 03 December 2007 19:19:29 DJ Delorie wrote:
> Is it time for another run of challenge boards? ;-)
Maybe a home fab challenge. :)
Peter
--
Peter Brett
Electronic Systems Engineer
Integral Informatics Ltd
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Randall Nortman wrote:
> On Mon, Dec 03, 2007 at 10:07:23AM -0800, Lope De Vega wrote:
>> I'm trying to build a circuit with a cp2102, which has
>> 0.5 mm between pins' center (actually 0.2mm between
>> pins). It is a qfn-28 package.
>
> I have never played with toner transfer schemes,
Ditto for
> These days I do 4-layer boards mostly, so home etching is just not
> an option anyway.
Yes, it is: http://www.delorie.com/electronics/usb-gpio/
And yes, I think we've all agreed that I'm at least partly insane.
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On Mon, Dec 03, 2007 at 10:07:23AM -0800, Lope De Vega wrote:
> I'm trying to build a circuit with a cp2102, which has
> 0.5 mm between pins' center (actually 0.2mm between
> pins). It is a qfn-28 package.
Same spacing as QFP, which I've done successfully. I didn't try to
toner-transfer it, thoug
> I wanted to ask if anyone has had success with something similiar?
I've done 0.4mm pitch TQFP with toner transfer and a soldering iron.
It takes some care, but it can be done. 0.5mm pitch is now "easy" for
me.
Note, however, that I use Pulsar's coated paper, which gives better
results than pl
On Mon, Dec 03, 2007 at 10:07:23AM -0800, Lope De Vega wrote:
>
> I'm trying to build a circuit with a cp2102, which has
> 0.5 mm between pins' center (actually 0.2mm between
> pins). It is a qfn-28 package.
I have never played with toner transfer schemes, but I have done
boards with 0.5mm pitch
Hello,
I've been for a while using gschem and pcb though just
for practice, I've never materialized anything with
them, though now I'm willing to.
I'm trying to build a circuit with a cp2102, which has
0.5 mm between pins' center (actually 0.2mm between
pins). It is a qfn-28 package.
I wanted to
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