Re:Tape for toner transfer
2009-07-10 by RICHARD HEILIGER
I don t use tape. Just align the paper to the board and feed it in. On double sided I use drafting tape to align the two sides to a scrap of board on the first
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Re: Tape for toner transfer
2009-07-10 by Ken Stuempges
I also use Kapton Tape - I m running my hacked GBC laminator at 330 degrees with no problems. I got my tape on ebay- you can find some good prices usually.
Re: [Homebrew_PCBs] Tape for toner transfer
2009-07-10 by KeepIt SimpleStupid
Kapton tape should work. e.g. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=3M541312-ND The one I m used too will withstand 200 deg C
Re: Tape for toner transfer
2009-07-10 by a3v03v0
I use 3M brand blue painters tape. It is a lower tac then regular masking tape. I tape two opposing sides. I am not sure it is the greatest idea maybe one
Re: [Homebrew_PCBs] Pictures of my 35% (130 vol) H2O2 bottle
2009-07-10 by Donald H Locker
Wow. Handle with GREAT care, please. I m impressed! Donald.
Tape for toner transfer
2009-07-09 by evaine23
I just bought a PL100 laminator and some HammerMill Color Laser Gloss paper. I have been tapping the pattern to the board with various types of tape and
Pictures of my 35% (130 vol) H2O2 bottle
2009-07-09 by jj_winkel
... H202 ... Handle with great care and solid rubber gloves. http://z1.zod.fr/z/h2o2-bouteille-NZM.jpg
Re: alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-09 by Ben
... What I saw on that site is $35.13/Gal. + 17.41 S&H. Just started my Tank about 6 weeks ago with this doing the 2 to 1 mix using the 3% Hydrogen peroxide,
Re: [Homebrew_PCBs] Re: alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-08 by Roland F. Harriston
I ve been told that cosmetologists use the strong stuff for bleaching hair. Women have this done used to be called Peroxide Blonds . Roland F. Harriston, P.D.
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-08 by Simao Cardoso
... Humorous and realistic approach. For CuCl 3% H2O2 do super fine to initiate it, and even 100% grade will be little stupid to regenerate since you will be
Re: alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-08 by pork_u_pine2000
... I buy mine from the local health food store for about that price. It works well. I have no idea why they sell 35% H2O2. I probably don t want to know.
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-08 by Henry Liu
I haven t used this site but it looks cheap. 1 quart of 35% for $20 or 1 gallon for $30: http://www.dfwx.com/h2o2.htm?gclid=CNanheiu3poCFQEeDQodIH6CzQ
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-08 by Michel Baguet
Hi all, I know personally members of the GEA, a rocketry club in belgium, they buy H2O2 at 30% that they have to distillate to get it above 80%, it is used in
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Roland F. Harriston
Jack: Where do you live? Roland F. Harriston, P.D. *****************
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Jack Coats
My Dad worked for Bell Helicopter when Bell Aerospace came out with the initial rocket belt . If I remember right it was propelled by a little bit of
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Stefan Trethan
Then the solution is obvious. We must all get involved with model reocketry and H2O2 motors, then the complications purchasing 30% H2O2 will look insignificant
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by DJ Delorie
High strength H2O2 is also used in ROCKET FUEL. Purified up to 98% it s a VERY efficient oxidizer.
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Myc Holmes
Based on the cost of H2O2 and Muriatic (HCl) acid is is not worth the time and effort to homebrew it. ... [Non-text portions of this message have been
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Simao Cardoso
... http://en.wikipedia.org/wiki/Hydrogen_peroxide Is complicated. You can search for books, papers and patents about it either. Is simpler to buy 35-50% in
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Myc Holmes
Be very careful with the high strength H2O2. It can cause very serious burns. High strength H2O2 is used as a sterilizing solution in the manufacutering and
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Jack Coats
How is Hydrogen Peroxide manufactured? Most chemicals don t have a hugely complicated manufacturing process. We might be able to duplicate it at home with
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Simao Cardoso
... 30 volume is 9%. In a pharmacy they said can mix the thing. But charge 20eur for mixing (plus the product) and that s more than i will pay for the thing.
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Myc Holmes
I had a similar experience. but accompanied by a very strange look. Myc ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-07 by Donald H Locker
In the USA, I purchased some 30-volume (I think that s 15%) H2O2 from Sally Beauty Supply. The sales people thought it was funny that a 55+ year-old guy was
Re: [Homebrew_PCBs] alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-06 by Simao Cardoso
... My sister is veterinarian and told me the same. It is used to wash/clean big animals foots. Like horses or cows (i think already said this here). But
alternative to 3% hydrogen peroxide: 35% animal-grade hydrogen peroxide
2009-07-06 by jc805sb
I heard from a chemist. Veterinarians use hydrogen peroxide at 35% strength for animal use. This should be available for purchase easily rather than the 3%
Re: [Homebrew_PCBs] Oxygen tablets for CuCl regeneration
2009-07-06 by Stefan Trethan
There are ways to increase efficiency using pure oxygen, google for downstream reactor (also used for fish tanks). I already tried using a piece of a chlorine
Re: [Homebrew_PCBs] Oxygen tablets for CuCl regeneration
2009-07-05 by Adam Seychell
... I don t see why it wouldn t work. A bit expensive though for what you might possibly gain in relation to regeneration speed compared to room temperature
Re: [Homebrew_PCBs] Oxygen tablets for CuCl regeneration
2009-07-05 by DJ Delorie
I wonder if it would be simpler to just buy a small bottle of oxygen from the local pharmacy or welding supply store.
Oxygen tablets for CuCl regeneration
2009-07-05 by Ken Stuempges
Howdy I have this hare-brained idea on another method to regenerate Cuperic Chloride etchant. I plan on getting some Oxygen Tablets (used in fish tanks,
gerb2tiff 1.0.3
2009-07-05 by Adam Seychell
I ve uploaded and new version of gerb2tiff. Stefan, I got around to adding the feature to render multiple Gerber files to single bitmap. See file ChangeLog.
Re: [Homebrew_PCBs] Re: Using pico projectors and maskless exposure
2009-07-03 by Simao Cardoso
... There are some power modules that use smd transistors soldered on very thin fr4 boards which are glued to thick aluminium plate. It works at the same time
Re: [Homebrew_PCBs] Re: Using pico projectors and maskless exposure
2009-07-03 by Troy
Looks like the copper sheets could be used for inkjet as well. I wonder what else the sheets could be attached to (fr4 can t be the only option...)?
Re: [Homebrew_PCBs] Using laser to expose photoresist or toner?
2009-07-03 by Simao Cardoso
Did you calculated the time needed by a 2 axis machine to print with a single beam??? I think isolation milling can beat that! See my post few minutes ago
Re: [Homebrew_PCBs] Re: Using pico projectors and maskless exposure
2009-07-03 by Simao Cardoso
You are reinventing the 70 s gerber photo plotters! See http://www.artwork.com/gerber/appl2.htm. Todays photo plotters use an lcd like a projector and raster
Re: Using pico projectors and maskless exposure
2009-07-03 by gsi11135
Why not focus the projection and move either the projector or PCB while only exposing portions of the PCB at any one time. Essentially maskless lithography.
Re: Using laser to expose photoresist or toner?
2009-07-03 by javaguy11111
What power laser are you using?
Using laser to expose photoresist or toner?
2009-07-03 by Cristian
... I m working on that, with red (only to see it) laser. Quite good results for the beginning. It melts the ordinary (cheapest) tonner. I have to solve: how
Re: [Homebrew_PCBs] Re: Muriatic Acid and Hydrogen Peroxide Fumes
2009-07-03 by Simao Cardoso
uspo 4545850 and 4632727 instead. My mistake.
Re: [Homebrew_PCBs] Re: Muriatic Acid and Hydrogen Peroxide Fumes
2009-07-03 by Simao Cardoso
... Funny! Yes is a crazy thing. But is PATENTED for pure tin metallic resists! Like i said is like the peroxide-sulfuric etchant, and from a searchable post
Using laser to expose photoresist or toner?
2009-07-03 by ngh2k3
Hi, Has anyone tried using a low power lasers from cd/dvd or blue ray burner drives? I expect the accuracy could be quite good. A blue ray laser should be
Re: [Homebrew_PCBs] Re: Muriatic Acid and Hydrogen Peroxide Fumes
2009-07-02 by Adam Seychell
... A nice effort on finding a suitable etchant for metallic etch resist. I tried persulfate but that attacked tin enough to make it unreliable. From your
Re: [Homebrew_PCBs] Using pico projectors and maskless exposure
2009-07-02 by DJ Delorie
... The last board I did was a lowly 5x2 and was 14,400 pixels across. I think 1080i is nowhere near enough resolution for PCB exposure.
Re: [Homebrew_PCBs] Gerber file converter
2009-07-02 by Adam Seychell
... Hi Stefan , its nice to know someone out there has a use for it. Yes, its GPL and no restriction to use it commercially, provided the program is
Re: Using pico projectors and maskless exposure
2009-07-02 by Steve
The pico projectors I ve seen are low res, less than NTSC TV. And 1080i isn t even as high a resolution as my 19 monitor. It has been said before here that
Using pico projectors and maskless exposure
2009-07-02 by javaguy11111
Not sure if people have heard about pico projectors that are slowly making their way out into the market. The ones that I have seen so far use LEDs as the
Re: [Homebrew_PCBs] Gerber file converter
2009-07-01 by Leslie Newell
Hi Stefan, It is GPL so you can use it for any purpose. You could even sell it if you wished but any changes you make must be made available to others for
Re: [Homebrew_PCBs] Gerber file converter
2009-07-01 by Stefan Trethan
I had this sitting in my inbox for ages now, finally I got around to try it and it is just what I was looking for. Can we use this tool commercially? To
Re: Mechanical Etching Bits
2009-06-30 by rf33333
tools: http://precisebits.com/applications/pcbtools.htm
Re: [Homebrew_PCBs] Mechanical Etching Bits
2009-06-29 by JanRwl@AOL.COM
In a message dated 6/29/2009 7:37:03 A.M. Central Daylight Time, mp@hyb.si writes: I am looking for european supplier for mechanical etching bits for using