Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Hugo Ferreira
Hi. Quimica is the portuguese word for Chemistry . Quimical is a typo from a portuguese speaking person trying to say Chemical . =:-) Only because they
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Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Simao Cardoso
... No. Just current densities i saw at various patents and papers. Like for DC 1A per dm.sq max for chemistries without additives 75min time. Or 3A/dm.sq with
Re: Quimical VIAs
2010-12-16 by powermatic66
MG Chemicals sells a that includes chemicals to plate vias. The directions may be interesting too http://www.mgchemicals.com/products/electroless.html
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Simon Gornall
... Do you have a reference for that current calculation, Simao ? I was looking at http://www.thinktink.com/stack/volumes/volvi/copplate.htm and they are
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Simao Cardoso
... And i admit that didn t look to what CAT4101 were. ... You need fixed voltage limited current that varies with board size. The most important is respect
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Simao Cardoso
... Experience only with comercial palladium just like the one Markus Zingg bought. In a commercial machine for small runs during some months. With horrific
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Donald H Locker
Thank you Simon, I found it. I had to enable javascript to see those bits. I m on my way! Donald. -- *Plain Text* email -- it s an accessibility issue () no
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Simon Gornall
... At the top of the page, there s a welcome link (which is what you re reading), and a DIY link (which jumps to a blog-style page). Cheers Simon
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Donald H Locker
Hello, Simon. I couldn t find a link or guess the location of the DIY page referenced at the bottom of your platepcb home page. I did find the lpkf and
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-16 by Donald H Locker
Aha! Thank you. I almost didn t get to chemical until sending my question, then the light bulb started to glow. Now all is clear. Thanks for the information
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Simon Gornall
... Oh, I ll easily admit I don t fully understand everything I need to know for this :) Yet :) ... My understanding was that you tend to vary either current
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Larry Battraw
... This sounds very interesting since you ve had actual experience using these types of chemistries. Would you mind telling how you used them as far as how
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Simao Cardoso
... It should be a typo for chemical since in both Portuguese and Spanish chemistry is spelled as química (quimica for non-utf8 users), and Vicent seems
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Donald H Locker
I m confused about what quimical is. I can t find that in any dictionary. Do you mean chemical? Done with chemistry? Donald. -- *Plain Text* email -- it s
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by DJ Delorie
Hmmm... I wonder... pre-drill the via holes (or all of them I suppose) to match some wire you have. Push wire through and clip, so that it sticks out a little
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Simon Gornall
... I mill out PCBs at home using my Everprecision 2002 machine, and then I make connections with solder-paste. Using paste is a lot faster than using solder
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Vicent Colomar Prats
Hi Donald, I think your idea of putting a thin wire in a slotted pad could work, but it is going to be a lot of work. A friend of mine also tried to flat the
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Donald H Locker
I have no personal experience. I think a plated-through-holes (PTH) process is usually a bit beyond the hobbyist level, but is the only way of achieving
Re: [Homebrew_PCBs] Quimical VIAs
2010-12-15 by Vicent Colomar Prats
Any info on double-sided metallized pads or vias? 2010/12/13 Vicent Colomar Prats ... [Non-text portions of this message have been
Re: [Homebrew_PCBs] UV reversal film
2010-12-13 by Philip Pemberton
... Mega do something like that for their Quickmark signmaking system. It s a two-layer peel-apart thing if memory serves. www.megauk.com if you re
[Homebrew_PCBs] Quimical VIAs
2010-12-13 by Vicent Colomar Prats
Hi all, Does anybody know or use an affordable and easy way, from the hobby (not professional) point of view, to create doble-sided VIAs or Pads? I use the
UV reversal film
2010-12-11 by Raymond
Dose any one now if Orange UV reversal film is still available. I used to use it 30 years ago; expose with the normal UV exposure unit and develops in water.
Re: SMD soldering
2010-12-06 by blue_eagle74
This is an older post but thought I would add to it. I use tips at 700 degrees F. The temp is not as important as to the time you spend on the joint. The quote
Re: [Homebrew_PCBs] SMD soldering
2010-11-27 by Steve Wiseman
... If you can t extend the pads because the board s already made, my technique for things like these is to hover the part a small distance above the board.
Re: [Homebrew_PCBs] SMD soldering
2010-11-27 by Leon Heller
... If you extend the pads a bit, you should be able to manage it with suitable soldering iron, especially a Metcal like I use. You need to be careful, though,
Re: SMD soldering
2010-11-27 by Howard Chester
Are you using ready made boards? If not and you are designing/making your own boards, simply create a pad layout with larger pads to accommodate the resonator.
SMD soldering
2010-11-27 by coreyker@ymail.com
I ve recently started to solder SMD components with my iron. I ve had good success with 805 and 603 resistors, LEDs and diodes. But last night I was trying
Re: [Homebrew_PCBs] Liquid Tin
2010-11-27 by DJ Delorie
http://www.delorie.com/pcb/liquidtin/
Re: [Homebrew_PCBs] MAX 668eub
2010-11-27 by w b
I knew I wasn t crazy. I will try this and report back Thank you [Non-text portions of this message have been removed]
RE: [Homebrew_PCBs] Re: Cleaning Liquid Flux
2010-11-27 by Boman33
If they are ceramic tile you can use acetone. Do not use it on other types of tile or it might dissolve them. Bertho =============================== From
Re: Cleaning Liquid Flux
2010-11-27 by Johnny B
Thanks for replying, I got all the stickiness up with the alcohol, but there was a non sticky film left. My wile has been scrubbing it with cleanser and a
RE: [Homebrew_PCBs] Cleaning Liquid Flux
2010-11-27 by Steve Maroney
How about a can of Flux Remover? :) If it s still sticky I would say it s not cleaned but if the stickiness is gone, then the flux maybe cleaned and the tile
Re: [Homebrew_PCBs] Liquid Tin
2010-11-27 by Pablo Nicolás Núñez Pölcher
Hi, this is my first post, so I hope you don t mind if I just stick my nose right into this thread. It s just I ve found it very interesting. Actually, Bill is
Re: [Homebrew_PCBs] MAX 668eub
2010-11-26 by Howard Chester
Hello again Adastra 2001, Right, the problem is the MAX668EUB pad footprint in the DIPTrace is incorrect !!! I have created a folder called chester in the
Cleaning Liquid Flux
2010-11-26 by Johnny B
Anyone know of a quick way to clean up a Liquid Flux spill? I accidentally dropped a small class bottle of Flux on a tile floor. Everything I tried like
Re: [Homebrew_PCBs] Liquid Tin
2010-11-26 by William Laakkonen
Yes, it is dangerous and it could be home brewed- YMMV MG Chemicals MSDS shows it is stannus sulfate, sulfuric acid, and as I recall, it is mixed with water
RE: [Homebrew_PCBs] Liquid Tin
2010-11-26 by Simao Cardoso
... That s NOT an imersion tin plating for copper, it s the salt used in the outdated and stupid roll tinning machines. It s used on top of melted solder on
Re: [Homebrew_PCBs] Liquid Tin
2010-11-26 by Ryan Bray
I have used it quite recently actually, and it happens to work quite excellently. ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Liquid Tin
2010-11-26 by Leon Heller
... I ve got a bottle of the tin plating compound on this web page: http://www.megauk.com/pcb_chemicals.php but haven t tried it. Leon -- Leon Heller G1HSM
RE: [Homebrew_PCBs] Liquid Tin
2010-11-26 by Krzysztof Juszczak
Hi, Check this link http://il.farnell.com/cif/bs200/tinning-salt/dp/4148071 From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On
Re: [Homebrew_PCBs] Source for solder paste squeegees?
2010-11-26 by Adam Seychell
... I ve done a bit of solder past printing. I used a commercially etched brass stencils. I read about people often use steel squeegees. So I looked around for
Liquid Tin
2010-11-26 by liquias
Hi, has anyone ever heard of this Liquid Tin by m.g. chemicals ? this material is supposed to plate the PCB after the etch process, and passivate the copper.
Re: [Homebrew_PCBs] MAX 668eub
2010-11-26 by Howard Chester
... From: First L Subject: [Homebrew_PCBs] MAX 668eub To: Homebrew_PCBs@yahoogroups.com Date: Friday, 26 November, 2010, 3:50 Ok,
MAX 668eub
2010-11-26 by First L
Ok, this is the story so far. I asked for and got great help from the group about a PCB CAD program, Diptrace. It is a lot less of a P.I.T.A. than Eagle. But
Re: Free toaster oven - Tacoma, WA
2010-11-24 by ralph
i m interesting to know how you making it , can you tell me please ? thank you
Free toaster oven - Tacoma, WA
2010-11-24 by Steve Greenfield
I have an extra toaster oven. PCB soldering and ink cooking. Tacoma, WA free for pickup. Works fine, relatively clean, metal body. Please reply to me directly,
Re: WinQcad
2010-11-22 by mikep_95133
Hey Daryl, Did you ever start using WinQcad? I use it because if I design only a couple of boards each year, it s hard to come back up a steep learning curve.
Re: Source for solder paste squeegees?
2010-11-19 by dubob4432
sounds like a nice recipe :) i too had issues w/ 1 or 2 bridges on just a tqfp-32 package and also a couple legs that didn t make contact, i think the solder
Re: [Homebrew_PCBs] Source for solder paste squeegees?
2010-11-19 by Philip Pemberton
... [...] Fixed it! I made a squeegee out of a sheet of K&S 2mm aluminium sheet (cut in half), a piece of 0.001 spring steel and some M4 machine screws. And
Re: [Homebrew_PCBs] Re: Source for solder paste squeegees?
2010-11-19 by Philip Pemberton
... 0.1mm thick Polymex PET, from www.smtstencil.co.uk. -- Phil. ygroups@philpem.me.uk http://www.philpem.me.uk/