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2009-01-26 by Wayne Topa
... What was the volume of the the peroxide, the 3% drugstore type or the 30% Beauty Supply type? I was able the get the 30% and I think I read, somewhere,
2009-01-26 by Adam Seychell
... sorry, you said immersion silver not immersion tin. I m don t know if silver will survive persulfate etchants. It might.
2009-01-26 by Adam Seychell
Definitely not. You only hope is gold plating or use an alkaline ammonia type etchant like the many PCB professionals use.
2009-01-26 by twb8899
... Gold works good as an etch resist in ferric chloride solutions but silver probably won t work at all.
2009-01-26 by lcdpublishing
I followed the directions as such... 2 parts common hydrogen peroxide 1 part muriatic acid The acid is the common type sold at hardware stores and the hydrogen
2009-01-25 by Bob_xyz
... H2O2 is available at beauty supply stores in 20, 30, and 40 volume for bleaching hair. Depending on the store, you may or may not need to have a licensed
2009-01-25 by thespeakerguy
Hi Everyone - Can immersion silver be used as an etch resistant? I currently use Ferric Chloride. The reason I ask is that I flood my boards with copper, and
2009-01-24 by Morris Odell
Hi all, I ve been using FeCl3 for longer than I can remember but the solid form is getting hard to find these days. I m looking at alternatives such as CuCl2.
2009-01-23 by DJ Delorie
... Don t need to yet. The initial bath is very agressive, mostly because of all that H2O2 in there. ... It will be a dark emerald green when converted. You
2009-01-23 by lcdpublishing
Hi guys, I have been etching for a while now with ferric chloride. Today I made up a different home brew based on information found on instructables. This
2009-01-22 by DJ Delorie
... What I did was strip the insulation off the last 5 inches of the wire, then cut off the exposed strands. That lasts a while, then strip and cut more,
2009-01-22 by Stefan Trethan
I always find it hard to separate stranded wire because it is twisted together. It knots up after only a short length. However i think i have rescued a couple
2009-01-22 by leon Heller
... From: DJ Delorie To: Sent: Thursday, January 22, 2009 8:13 PM Subject: Re: [Homebrew_PCBs] Eyelets?
2009-01-22 by DJ Delorie
... I thought that too. Then I realized that speaker wire, stripped and strands separated, yields a lifetime supply of cheap via wires...
2009-01-22 by Lee Studley
Goto ThinkAndTinker http://www.thinktink.com/stack/volumes/volvi/condink.htm Been doing similar for years. -Lee
2009-01-22 by trevwhite74
Got to admit I am actually feeling a bit dumb too. The stitching aproach really makes so much sense and speeds things up so much. I can not believe I used to
2009-01-22 by Stefan Trethan
Never mind, you are in good company of other dolts. My first thought was the same as yours when i read about the method. My second thought was that ll waste a
2009-01-22 by roycepipkins
Wow! What a simple and easy idea. I ve been fussing with individual lengths of wire for each via. I feel like a dolt now! Anyway, thanks for the post I will
2009-01-22 by Juan EA7FNJ
Hi guys! Conductive glue: http://www.inklesspress.com/conductive_glue.htm Can it work to activate the holes and electroplate the vias? any idea?
2009-01-22 by trevwhite74
... Yeah, agree with your thinking. CW2400 was recommended by a chap in America who has an LPKF milling machine and has used it. I do not know quite how
2009-01-22 by Mark Lerman
I have several thoughts on this. I mill my boards, so the simplest thing would probably for me to do it the same as the video. I m pretty sure I can find
2009-01-22 by sjlanejan760
Stephen Lane wrote: I realize this is off topic slightly but here goes for those that are thinking of going down this path for making boards etc. The one I got
2009-01-22 by trevwhite74
Did you watch the videos on how to apply this stuff? You need some film/foil to cover the holes and then drill them out before applying the paste. Then it
2009-01-22 by Mark Lerman
Is anyone interested in buying some of the LPKF ProConduct to try? If enough of us are, I would be willing to purchase the 20 packets and resell them
2009-01-22 by sjlanejan760
Stephen Lane wrote: The cheap chinese ones only do raster(something to do with the built in firmware I ve been told) but the more expensive ones do vector and
2009-01-21 by Juan EA7FNJ
Hi guys! I ve just found this video: http://es.youtube.com/watch?v=djr1KmtAYKg To activate the holes: why don t use copper dust with some disolte varnish? I
2009-01-21 by JanRwl@AOL.COM
In a message dated 1/21/2009 1:32:02 P.M. Central Standard Time, flight@flightofharmony.com writes: Out of curiosity, has anybody used the old-fashioned
2009-01-21 by Harvey White
... Yes. I find it useful for vias, but I don t use the eyelets (too big, need about 0.051 hole) for parts leads, although I could for RL07 size (1/4 watt)
2009-01-21 by Stefan Trethan
... Actually i started a reply, observing that it couldn t work because when the first hole is connected plating would stop, and all the holes are parallel.
2009-01-21 by Simao Cardoso
... There is similar things from thinktink and others, they all seem carbon/silver curable inks. They are for make the vias conductive also without plating
2009-01-21 by Stefan Trethan
Of course you could use a DC or AC universal motor. Both will run just fine with PWM. AC universal motors will also run just fine with phase angle control
2009-01-21 by Simao Cardoso
It s a good thing but, I am surprised by quantity of professional, and experienced reply on a Homebrew named list... If would buy a already made machine if
2009-01-21 by Bob_xyz
... As long as you don t have too many of them, I ve found that it s fairly quick and easy to stitch vias using a length of stripped wire-wrap wire. After
2009-01-21 by flightofharmony
Out of curiosity, has anybody used the old-fashioned eyelet approach? Definitely not worthwhile for production, but it would be very handy for DIY.
2009-01-21 by trevwhite74
Someone recommended circuitworks CW2400 Conductive Epoxy as an alternative to this and it is cheaper. I have some but not had chance to use it yet. Trev
2009-01-21 by J Deringer
http://www.irdbalancing.com/balancing.asp ... From: Mike Henry Subject: [Homebrew_PCBs] Re:50.00rpm pcb spindle idea To:
2009-01-21 by Mike Henry
Would be curious how you balance the assembly? At 60k-100k rpm, this will be critical for smooth operation and prevent tools from breaking, bearings from
2009-01-21 by Mark Lerman
I found very interesting. They have a paste that is essentially squeegeed into the holes,
2009-01-20 by Simao Cardoso
The problem seems there isn t any. Manufactures and resellers make a lot of money from this. You will only find the users manual . The most newbie thing out
2009-01-20 by javaguy11111
... I have seen those chinese laser engravers on ebay and have wondered if they were worth getting. How well has it worked for you.
2009-01-20 by Steve Wiseman
... Not all of them - mine s vector, and only kicks down to raster when it s doing bitmap stuff. ... Yeah - anodised aluminium marks superbly - I use it for
2009-01-20 by Cristian
... Give me a link, please. Cristian [Non-text portions of this message have been removed]
2009-01-20 by sjlanejan760
... Hi guys interesting thread, For my 2c I use a 40W CO2 Laser (Chinese Engraving one)(2nd Hand off ebay) to burn of matt black spray paint off brass to make
2009-01-20 by Kim Vellore
I have tried painting the pcb with different types of paint and burning off with a laser, the results are OK, fine lines dont etch well, the burnt off paint
2009-01-20 by Juan EA7FNJ
Hi guys! Well, my problem is the chemistry: I would like to find a good guide about electroplating, but I don t find anything. Do you know about a good guide?
2009-01-20 by Juan EA7FNJ
Hi guys! Well, all the videos I v seen the laser burns black platic or vinyl. Maybe it s a good point to start the experiments. My idea is expose the board
2009-01-20 by H. Carl Ott
... Not that it s likely to be a problem with low power lasers, but I had heard (perhaps wrongly) that the vaporized copper can also be VERY hazardous to the
2009-01-20 by Jack Coats
I think that is why the Epilogue and such boxed lasers do well. The safety interlocks limit the amount of stupid human tricks that can be easily
2009-01-20 by Steve Wiseman
... Closing eyes and looking away does the trick. In any environment where there was anyone other than me, I d be rather more rigorous. This is (obviously)
2009-01-20 by Russell Shaw
... There s a black coating resist that s designed to be coated on pcb and burnt off with a laser. It s designed for the laser engravers commonly seen on ebay.