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2010-01-06 by Stefan Trethan
I can t remember anything of use about the sulphuric acid thing. What I do remember is that copper sulphate crystallizes out when the etchant is cooled, which
2010-01-06 by Leon Heller
... From: Leon Heller To: Sent: Wednesday, January 06, 2010 2:35 PM Subject: Re: [Homebrew_PCBs] Dry
2010-01-06 by Leon Heller
... From: Volkan To: Sent: Wednesday, January 06, 2010 8:04 AM Subject: [Homebrew_PCBs] Dry film tenting
2010-01-06 by Larry Battraw
... Hi Stefan, I ve been working CuCl etchant recently and really had problems with the terrible fumes it puts off, particularly when it s heated so it will
2010-01-06 by Stefan Trethan
You could, but the staedtler pen wih a ruler to guide it is good for 10mil lines or so, and I m just too darn lazy to do much masking up. Once the process was
2010-01-06 by Stefan Trethan
Hi, I think only the sulphuric acid / hydrogen peroxide etchant will work with tin as reisist. It is similar to CuCl but has the disadvantage of not keeping as
2010-01-06 by Volkan
Hi, I m facing dry film tenting problems. It couldn t protect THP holes and tents start to break during developing. I did some googling and saw that this
2010-01-06 by H. Carl Ott
... I did a board design, but got I got stalled on the software end. I m not sure the source code that can be downloaded from sparkfun is the same as they ship
2010-01-06 by DJ Delorie
... I built my CuCl tank using stuff from the local supermarket (hydrogen peroxide 3% - for cleaning cuts) and hardware store (muriatic acid 37% - for cleaning
2010-01-06 by Russell Shaw
... They stand to profit from that better because you re forced to dispose of it due to decomposition. Real envirofriendly with all that copper in it. With
2010-01-06 by Lez
I just love reading these etchent points being argued back and forth when all i can buy is fecl, and even then its expensive, as in the UK all we have left
2010-01-05 by Russell Shaw
... I will use nothing else. ... I haven t made a mess since using it the last 50+ times ... It lasts forever. Just cover the container. Add a bit of HCl every
2010-01-05 by Kerry Wentworth
... You can lay down scotch tape as a mask to make fine lines. It won t pull up properly transfered toner. It also helps if you are as clumsy as I am. ;)
2010-01-05 by Simao Cardoso
... Not really like that. I don t really know what chemistry things happens for sure but i can say that (since dumbly i try it once with a bit of used etchant)
2010-01-05 by Andrew Mathison
Dear Stefan Trethan if you need it so fine then buy a fountain pen (cheapest you can buy, kids quality) and load it up with Edding ink from a refill bottle, or
2010-01-05 by Andrew Mathison
Dear Piers Goodhew see my previous post on Edding pens, they come from fine upwards! regards Andy (Apologies if this is a double-mail, my last attempt seems to
2010-01-05 by David Griffith
I m sure a few of you are on the Sparkfun forums. I m interested in making a few bluetooth Port-o-Rotary boards for converting, say, candlesticks or DynaTacs.
2010-01-05 by Leon Heller
... From: DJ Delorie To: Sent: Tuesday, January 05, 2010 5:26 PM Subject: Re: [Homebrew_PCBs] How to dispose
2010-01-05 by DJ Delorie
... What happens if you dump spent FeCl etchant into a CuCl ethant bath?
2010-01-05 by DJ Delorie
... IIRC you add a base (sodium hydroxide (drain cleaner) if you have it, else baking soda) until the copper precipitates. That tells you the pH has just
2010-01-05 by Brian Lalor
I haven’t etched my first board, yet (getting asymptotically closer; maybe this week if I can get my toner sorted) so I’m watching this with extreme
2010-01-05 by Brian Lalor
... What if you really really need to? :-) Baking soda? -- Brian Lalor blalor@bravo5.org
2010-01-05 by Piers Goodhew
... I use what was a sliced peach jar. Relatively thick HDPE with a screw top, slightly less than 1 of hot water, throw an extra teaspoon of Amm. Persulfate
2010-01-05 by Chris
Thanks for the info Simon. I ordered some bits and will give it a try. Chris
2010-01-05 by Stefan Trethan
Yes, Edding markers are of the slow drying kind. I have not found any with tips as fine as the Staedtler pens. ST On Mon, Jan 4, 2010 at 6:54 PM, Andrew
2010-01-05 by Leon Heller
... From: DJ Delorie To: Sent: Tuesday, January 05, 2010 5:33 AM Subject: Re: [Homebrew_PCBs] How to dispose
2010-01-05 by Leon Heller
... From: jimofc300 To: Sent: Monday, January 04, 2010 7:59 AM Subject: [Homebrew_PCBs] Newbie questions ...
2010-01-05 by David Griffith
... Might be worth a try. Lots of people have success with the slick pages of magazines. The ink already there won t transfer and the clay will hold the
2010-01-05 by DJ Delorie
... That s what I used until I got a pair of the heavy-duty rubber gloves. Just be careful that the sharp edges of the PCB don t tear them. ... Use a plastic
2010-01-05 by DJ Delorie
... Don t dispose of them! The acid/peroxide etchant becomes CuCl etchant with use, which can be air regenerated and used over and over again. The FeCl
2010-01-05 by Harvey White
... Works for me. ... I ll give it a try. ... T shirt transfer paper (at least, the inkjet type) has a film that goes over the whole page area. You d be
2010-01-05 by sailingto
I have to go over the sharpie spot two or three times to get good coverage. The first marking will not be totally dark, but by the 3 or 4th time marking
2010-01-05 by Piers Goodhew
(Apologies if this is a double-mail, my last attempt seems to have disappeared) I ve been meaning to ask re Sharpies: I got one, but the results are not great.
2010-01-04 by Andrew Mathison
Dear Stefan Trethan it may have already been mentioned (my apologies if that is so!), but Edding permanent markers can be reloaded , do not seem to dry out
2010-01-04 by Lee Studley
What was the line width achieved with this pen. thanks -Lee __________ Information from ESET Smart Security, version of virus signature database 4743
2010-01-04 by Stefan Trethan
The problem with the paint pens is that they don t keep so well. If you are a hoarder like me you ll sooner rather than later be left with a box of useless
2010-01-04 by Derward Myrick
Ken, This is real paint and comes in all collors. I think there are many brands of paint pens. The paint is very resistant to the etch solution. I used red
2010-01-04 by jimofc300
Hi, While I m an experienced design engineer, I ve never done a PC board in 40+ years of design. We had a special department to do that. Now retired, I thought
2010-01-04 by nathan_h_tna
Hi everyone, I m just getting started making PCBs. Actually, I ve been trying for some time, but have only recently been able to get good results using the
2010-01-04 by Harvey White
... I bought an extra fine point etch pen from All Electronics. It turns out to be a sharpie, but industrial variety, super permanent ink with a chemical
2010-01-04 by kabowers@NorthState.net
... Many years ago (before personal laser printers) I freehanded a rather complicated board and used multiple colors of Sharpies. Everything EXCEPT the black
2010-01-04 by sailingto
Is that something like a Sharpie? I ve been using Sharpies for a while now, they are available in what they call a Fine Tip and an Ultra Fine tip . If the
2010-01-03 by Derward Myrick
To the group Most might know this but to correct scratches and other imperfections on TT I use a paint pen. I went to Hobby Lobby and got a Tree House Studio
2010-01-02 by spacedcowboy@ymail.com
... I have an EP2002H machine from EverPrecision, and I can happily (and repeatedly) do a 4mil track/gap. The process my machine goes though is as follows:
2010-01-02 by sailingto
... GREAT!!! That means I am on the right list - I m CHEAP!! :):) Ken
2009-12-31 by Chris
Hi guys, I have a fairly accurate CNC machine I built for drilling PCBs but now want to see what it can do with isolation milling. I am curious as to what I
2009-12-31 by Stefan Trethan
Plane tickets are cheap now, but not _that_ cheap for a transatlantic flight ;-) If I bought it locally it would cost 5 times that. Amazon would ship the
2009-12-31 by William
... shipping on this is $9 = $25 total. you can get a Ryobi at Home Depot in tool department for $29 and if it breaks or doesn t work, they will exchange. ~
2009-12-31 by Ben L
... Think & Tinker www.thinktink.com sells the Dry Film Soldermask, The Soldermask runs about 4 times the price of the Resist I think. Also Mouser is selling
2009-12-31 by DJ Delorie
... I know, but it s a lot more expensive than etch resist, and I didn t have any but did have riston. (This list is about doing things cheaply, right? :)