The pdf titled Exploding Wires - Principles, Apparatus, and Experiments,
says a rule of thumb for exploding a wire is 200uF at 2000v. Meaning charge
a 200uF capacitor to 2000v and short it with a wire. The length of wire
used in the article was 6 inches to 12 inches long.
A wire exploded inside a through-hole or via would only be 1/16" long
(0.062"). Can the 200uF requirement be reduced since the length of wire is
shorter?
Microwave capacitors are 1uF so 200 would be required. Where can large
capacitors be found so 200 craigslist microwaves are not required?
Jeff
_____
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of smilingcat90254
Sent: Sunday, December 09, 2012 2:59 AM
To:
Homebrew_PCBs@yahoogroups.comSubject: [Homebrew_PCBs] Re: plating holes with an exploding wire
Just a minor point, in a vacuum, there is very little to no gas. Fans do not
help. If you are going to that trouble, just plate it.
I've uploaded the schematic into Files/"constant current source" of
Electronics - 101. If you want it here I can uploade it into
Homebrew_PCBs/Files directory. Yes the circuit has been built and tested.
Over temperature detection and shutdown for safety does work as designed.
All you need is a reasonably powerful power supply, and few other things and
you should be able to plate it!!
Copper sulfate: obtained as ZEP at Home Depot.
Hcl: obtained as Muriatic acid (very little needed)
Sulfuric acid: obtained as battery acid at NAPA auto parts supply. (very
little needed bought quart size)
Heavy rubber gloves to handle corrosive acid
Face shield to protect your eyes and face while handling muriatic acid and
battery acid.
Rubber apron to protect your body while handling the acid.
If you want more hand holding, just ask!
Sincerely,
Smilingcat
--- In
Homebrew_PCBs@yahoogroups.com<mailto:Homebrew_PCBs%40yahoogroups.com> , "Jeff Heiss" <jeff.heiss@...>
wrote:
>
> Can a vacuum deposition work? Would the vapor get into small vias, say
> 0.008"? Maybe a fan inside would help?
>
>
>
> https://www.youtube.com/watch?v=G2FhHuFrZrQ forward to 4:50 for the good
> stuff.
>
>
>
> Jeff
>
>
>
> _____
>
> From: Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com>
[mailto:
Homebrew_PCBs@yahoogroups.com<mailto:Homebrew_PCBs%40yahoogroups.com> ]
> On Behalf Of Slavko Kocjancic
> Sent: Saturday, December 08, 2012 12:37 PM
> To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
> Subject: Re: [Homebrew_PCBs] Re: plating holes with an exploding wire
>
>
>
>
>
> On 8.12.2012 17:09, alan00463 wrote:
> > How about just regular solid-conductor wire (Cu, Sn, etc.) ?
> > If it's the right diameter, it will fit into the holes.
> > Why wouldn't that work fine ?
> >
> >
> And how to pass component into that hole? Solid wire can be used only
> for "vias".
> Plating is to leave hole opened but to have electric contact with both
> layers.
> So if the hole is plated and you put resistor lead to the hole and
> solder in one side, the capilar "wick" efect will pull solder into the
> hole thru to other side. If hole is not plated then you must solder in
> both sides. And there is the problem. Resistors can be soldered in both
> sides but what for electrolytic capacitors?!?
>
> Slavko.
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]