Re: Where to purchase green solder mask from
2011-03-09 by leeleduc
Possible alternative product. Translucent green spray paint from Testors, a major model paint manufacturer. I haven t tried it but worth a look. see bottom of
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Re: [Homebrew_PCBs] Toner PCB for Beginner?
2011-03-09 by Kerry Wentworth
When I started, the first thing I did was research the internet. There, I found that you had to use vellum, or laser transparencies, or Staples photo paper,
Re: [Homebrew_PCBs] Pb-free reflow scorches PCBs with no soldermask
2011-03-09 by Adam Shea
Does it work any better if you hold at 175C for 5 minutes or so? The times I ve had trouble with lead-free reflow is when I don t get the board up to temp on
Re: [Homebrew_PCBs] Toner PCB for Beginner?
2011-03-09 by Chris Kleeschulte
You re correct, this group is really great, it is my favorite group. I feel that the people in this group are innovators par excellence! Plus, seeing all the
Toner PCB for Beginner?
2011-03-09 by John
The wealth of information in this group is overwhelming me! I would like to avoid buying into the process with supplies and equipment that are not going to
Re: Cutting circuit boards . . . again
2011-03-09 by bebx2000
Steve, I use the diamond setup you reference and I think it is the most cost effective solution for cutting PCBs. Proxxon makes superior products, but I don t
RE: [Homebrew_PCBs] Re: Vinegar, Salt, Peroxide Etching
2011-03-09 by Andrew Volk
Ah! About that curious cat, satisfaction brought him back! Andy _____ From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of
Re: Vinegar, Salt, Peroxide Etching
2011-03-09 by RJ
Thanks Rolland .. I wondered about that .. I am also going to get a bottle of that peroxide / phosphoric acid mix at the beauty supply. Just to try it on a
Re: [Homebrew_PCBs] Re: Vinegar, Salt, Peroxide Etching
2011-03-09 by Roland F. Harriston
Javaguy: I think it works like: the peroxide oxidizes the copper, i.e. decomposes it, and the muriatic acid dissolves the decomposed copper. I think the
Re: Hydrogen peroxide mixing
2011-03-09 by RJ
Seem to me that the conclusion was more or less that even though its ok to use the higher percentage peroxide, why do that and take the risk if its not
Re: Vinegar, Salt, Peroxide Etching
2011-03-09 by javaguy11111
I saw the same thing and tried it last night on a scrap piece of board. I was disappointed with the results. The board tarnished rather than etched.
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-09 by Wayne Topa
... Negative. I don t report ANY of this groups mail as SPAM. I Blacklist Locally not Globally. I have set up a filter to put unwanted mail, from MANY
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-09 by Jim Tonne
Steve: I am a lurker on this list and am following this peroxide and HCl with great interest. I keep looking for a straightforward answer to the what to use,
Where to purchase green solder mask from
2011-03-09 by pjbuser
Hi Can anybody help on where I can buy green solder mask from Have searched everywhere Or if there is an alternative product that is green I could use Hope
Cutting circuit boards . . . again
2011-03-09 by Steve
There was some discussion recently on another reflector regarding the use of a Proxxon KS230 table saw for cutting circuit boards. This saw was praised for its
Re: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-09 by Philip Pemberton
... It s not -- but it is blue sensitive! Hence the use of a BluRay LD. How did you rig up the laser driver? High speed opamp to generate constant current,
Pb-free reflow scorches PCBs with no soldermask
2011-03-09 by John Wilson
Hello there! This is probably a dumb question but I can t find anything in the list archives (but then again maybe I m searching for the wrong word). I m
Vinegar, Salt, Peroxide Etching
2011-03-09 by bebx2000
I came across this on hackaday and thought it might be of some interest.
Re: Laser Photoplotter
2011-03-09 by jmelson2
... What I do is run the laser on a pulse generator with about a 1:1000 duty cycle. That gives a bright enough spot for focusing without too much light. ...
Re: Toner cure
2011-03-09 by AlienRelics
Is there a reason not to share it with the rest of us? Steve Greenfield AE7HD
Re: Hydrogen peroxide mixing
2011-03-09 by AlienRelics
... So... did you mean: Give a man a fish, feed him for a day Treat a man with scorn for asking me about lures, then blacklist him. Are you saying that you
Re: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-09 by Donald H Locker
I like this solution - the power loss is minimal (only the side lobes are cut off) and the complementary lenses convert all incoming power to outgoing power
RE: [Homebrew_PCBs] OT: .FAB to Protel
2011-03-09 by Boman33
Thanks Malcolm, I really appreciate that you are taking the time to follow up. It bothered me that my search result was so limited and I had to find out why:
RE: [Homebrew_PCBs] OT: .FAB to Protel
2011-03-09 by Malcolm Parker-Lisberg
Bertho I get 69,000 hits, one of them: list a .FAB as a Fabmaster file extension, others mention importing Fabmaster
RE: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-08 by Boman33
Here is some additional info for cleaning up a laser beam: Changing the shape factor can also be done with a front surface mirror at an angle. Vary the angle
RE: [Homebrew_PCBs] OT: .FAB to Protel
2011-03-08 by Boman33
Thanks Malcolm, Unfortunately trying the suggested Google resulted in 11 hits with none of them with any useful info. It is too bad that there are so many
Re: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-08 by Philip Pemberton
... Sounds about right for a semiconductor laser. Usually you get somewhere between a 3:1 and a 6:1 aspect ratio for the spot (when really you want 1:1 or
Re: [Homebrew_PCBs] OT: .FAB to Protel
2011-03-08 by Malcolm Parker-Lisberg
If you google .fab file extension it return lots of links that may help identify the software. As you have the placements you could number the nodes and use
Re: Kodak PRD film ?
2011-03-08 by garydeal
Hi Jon, I understand your problem here, and have worked in the green darkness . You mentioned that the film is a proper black and white (no pink) when it
OT: .FAB to Protel
2011-03-08 by Boman33
Although this is not fitting the homebrew PCB category, many experienced guys are hanging out here and hopefully someone have some helpful suggestions: We have
Re: First CNC milled board
2011-03-08 by designer_craig
Matt, So which bit works best for you? On my board I used a 60 and it seemed to work fine. What RPM, DOC and feed rate are you using? What kind of board
Re: Simple Photoresist Recipe?
2011-03-08 by mtuchelt
Hexavalent chromium, good point. Thanks for the references.
Re: Kodak PRD film ?
2011-03-08 by jmelson2
... First, this is black and white LITHO film, not color film. Second, it has NOT been exposed to any stray light, and I am using the recommended safe light
Re: [Homebrew_PCBs] Simple Photoresist Recipe?
2011-03-08 by Volkan Sahin
I ve used similar formula before. It is chromate based and not environmental friendly. Because of that I started to use dry-film resist. Chromate based
Simple Photoresist Recipe?
2011-03-08 by mtuchelt
Hi All I posted an interesting patent on a photo resist process. The patent describes applying a non-sensitized (very simple) polymer coating to the pwb,
Re: First CNC milled board
2011-03-08 by buckeyes1997
oops wrong link
Re: First CNC milled board
2011-03-08 by buckeyes1997
I m still fine tuning my milling process but its working really well so far. http://www.allthingsrc.com/cnc/pcb_3.jpg
Toner cure
2011-03-08 by RJ
Jan Kok ? Can you email me off list please? I have an update for you on this topic .. Randy
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-07 by Roland F. Harriston
Wayne: Amen Brother! I would hazard a guess that the IQ of the majority of the people on this forum is quite above normal. Most of the members have at least
New file uploaded to Homebrew_PCBs
2011-03-07 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File :
Re: Kodak PRD film ?
2011-03-07 by Andrew
Oh, the irony -- as subsequent posts revealed, I got the math wrong too! Instead of 6 revolutions per second, it should actually be 10.
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-07 by Wayne Topa
... Anyone joining this group should refer to the group archives where a wealth of knowledge already exists. For those of us that have been the group for
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-07 by Randy S.
Maybe the groups should be renamed to Advanced_Homebrew_PCBs ________________________________ From: Boman33 To:
RE: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-07 by Boman33
Thanks James, Yes, that is something like that I had in mind. If Newbies could be redirected for the basic information it would help them a lot. Thanks for
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-07 by Roland F. Harriston
James Newton: Whenever some really good information comes up on this and other forums, I quickly do a printscreen, and put the page(s) in a three ring binder.
Re: Hydrogen peroxide mixing
2011-03-07 by James Newton
... http://techref.massmind.org/techref/pcbs.htm http://techref.massmind.org/techref/pcbetch.htm And so on... Use the little form at the bottom to post
Re: [Homebrew_PCBs] Re: Kodak PRD film ?
2011-03-07 by Peter Leybourne
... None of it particularly good news Jon. I m out of touch with PRD techniques. Personally, I would treat all film as light sensitive. Always keep it under
RE: [Homebrew_PCBs] Re: Kodak PRD film ?
2011-03-07 by Boman33
Clever!! From: jmelson2 Sent: Monday, March 07, 2011 00:52 Well, I actually built the laser pattern component. What I did was get a roll of communication
Re: Kodak PRD film ?
2011-03-07 by jmelson2
... I normally used a stop bath, but as the machine developers don t use it, I tried without stop bath, and had no different result. I also tried rinsing
Re: Kodak PRD film ?
2011-03-07 by jmelson2
... Yeah, this SOUNDS like the reaction I am having! This IS high contrast film, too. ... Well, I hope not. I paid $350 for the Agfa film over a decade ago,