Alt-BEAM Archive
Message #07780
To: Beam Mailing List beam@sgiblab.sgi.com
From: Thomas Pilgaard Nielsen ascii@hum.auc.dk
Date: Wed, 17 Nov 1999 09:16:48 +0100
Subject: [alt-beam] More PCB etching
Hi all,
since I have only had little previous experience in etching PCB's I was
wondering how fine one can mask the traces. How thin can I make each
trace and how much space would I need to leave between them.
Naturally I am talking about etching it at home using some kind of
chemical. Would there be differences in the possibilities of these
chemical or is that just plain vanilla?
Cheers and all,
Thomas, Denmark
--
---
"Fremtidens computere vejer maaske ikke mere end halvandet ton."
Popular Mechanics 1949
7781 Wed, 17 Nov 1999 00:44:57 PST [alt-beam] Re: Ceramic cutting beam@sgiblab.sgi.com "Timothy Flytcher" >Thats what the water is for, cooling.
>If you go slower, you will start to get big chips and flakes flying off.
>
The water is both for cooling and for lubrication...
as to the big chips flying off it is all in the size/type of the bit and
pressure applied... you could just use a dremel polishing tip and some heavy
buffing compound... just watch the temp...
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7782 Wed, 17 Nov 1999 09:59:00 +0100 More PCB etching Beam Mailing List Thomas Pilgaard Nielsen [mailto:ascii@hum.auc.dk]
Hi all,
since I have only had little previous experience in etching PCB's I was
wondering how fine one can mask the traces. How thin can I make each
trace and how much space would I need to leave between them.
Naturally I am talking about etching it at home using some kind of
chemical. Would there be differences in the possibilities of these
chemical or is that just plain vanilla?
Cheers and all,
Thomas, Denmark
--
---
"Fremtidens computere vejer maaske ikke mere end halvandet ton."
Popular Mechanics 1949
7783 Wed, 17 Nov 1999 01:22:11 PST [alt-beam] Re: absorbpsion circuit or something beam@sgiblab.sgi.com "Timothy Flytcher" >In line w/ the vibrating generators....there are those
>Seiko Kenesis watches that work off the vibration of
>one's arm. I'm not sure how much energy these
>produce, but a cool idea.
>
I was reading an article about Cyborgs a few years ago and there was a
collage kid in the mid west that claimed he could run his PC off the voltage
that surrounds the human body... I think it was either a coil receiver or
possibly a skin contact battery that used the wearer as the dielectric???
but the article did not say... just a strong statement of "fact"... ?????
______________________________________________________
7784 Wed, 17 Nov 1999 10:42:18 +0100 [alt-beam] Re: More PCB etching beam@sgiblab.sgi.com Thomas Pilgaard Nielsen "Van Zoelen, Bram AA SSI-TSEA-352" wrote:
>
> That depens on how steady your hands are.
> If i wants to make really fine traces then i cover
> the complete area with an etch resistance pen and
> then i use a knife to scratch or cut paths in the
> cover. This way i can make very fine traces. Example: i can make 3 lines
> between two IC pins this way.
Uuh - ok, I reckon that requies some skill (ie. skills i !don't! have)
A local retailer has some sort of transparent cover that you cant
laserprint your cirquit on - then iron it onto the printboard and then
etch it. It sounds fairly simple though I'm not sure of the quality.
From what you write i understand it's not like in the etching process
the whole thing would be gone just like that due to lines that are too
thin?
Thanks for the reply,
Thomas, Denmark
>
> Bram van Zoelen
> Robotics, kites, personal and more
> http://vsim.freeservers.com
> http:/beam.to/vsim
>
> E-mail
> vsim@mail.com
> vsim@vsim.freeservers.com
>
> -----Original Message-----
> From: Thomas Pilgaard Nielsen [mailto:ascii@hum.auc.dk]
> Sent: Wednesday, November 17, 1999 9:17 AM
> To: Beam Mailing List
> Subject: More PCB etching
>
> Hi all,
>
> since I have only had little previous experience in etching PCB's I was
> wondering how fine one can mask the traces. How thin can I make each
> trace and how much space would I need to leave between them.
>
> Naturally I am talking about etching it at home using some kind of
> chemical. Would there be differences in the possibilities of these
> chemical or is that just plain vanilla?
>
> Cheers and all,
>
> Thomas, Denmark
>
> --
> ---
> "Fremtidens computere vejer maaske ikke mere end halvandet ton."
> Popular Mechanics 1949
--
---
"Fremtidens computere vejer maaske ikke mere end halvandet ton."
Popular Mechanics 1949
7785 Wed, 17 Nov 1999 13:02:38 +0100 [alt-beam] Re: absorbpsion circuit or something beam@sgiblab.sgi.com Wouter Brok Hi
>I was reading an article about Cyborgs a few years ago and there was a
>collage kid in the mid west that claimed he could run his PC off the voltage
>that surrounds the human body... I think it was either a coil receiver or
>possibly a skin contact battery that used the wearer as the dielectric???
>but the article did not say... just a strong statement of "fact"... ?????
The human body burns about 100 to 200 Watts energy ... dependent on what it
is doing. Is it possible to convert this warmth to electricity .. don't
know how efficient that could become, but I doubt it will provide enough
for a PC to run on.
Wouter
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