Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by michael tenore
I believe it has been said that 30 to 35% Hydrogen peroxide can be found at Beauty Parlor supply stores! 3% is too weak to bleach Hair! 73 Mike
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Re: What is the best etching solution;
2009-04-26 by jj_winkel
... It is the CuCl2 (Cupric Acid) solution that is eternal not the H2O2+Hcl one. The CuCl2 bath must be prepared beforehand and looked after periodically,
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Stefan Trethan
I think you are better off sourcing the oxygen elsewhere. If you want to avoid evaporation / vapor escape issues with air bubbling you could feed pure oxygen
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Jack Coats
As an aside, I was looking on the net trying to find out how to MAKE at home Hydrogen Peroxide. Any one have a reference for me or a suggestion as to where I
Today's TT/photo/laminator notes
2009-04-26 by DJ Delorie
Tried a couple of things today, I ll lump them together here. Since modding my GBC to have temperature control, I d wanted to try toner transfer again. Today
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Alessio Sangalli
... I thought we also said the bubbler found in many etching tanks does this function to regenerate the etchant - and anyway in France it seems it s easy to
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Stefan Trethan
The etchant will only keep as long as it is regenerated (usually with oxygen from H2O2 or air). Especially with 3% H2O2 it is said to be hard/impossible to
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Alessio Sangalli
... In the US I haven t found 35% H2O2 so I use the 3% one. Result is that I do not have to add water to the mix. ... Why do you say this. We discussed long
Re: best printer for pcb use
2009-04-26 by Steve
Are you doing toner transfer, or photoresist? For toner transfer, there is a table in the Database section of the list. Everyone should be adding their laser
Re: What is the best etching solution;
2009-04-26 by n8ewy
... I just had my first experience yesterday. I used the HP laser printer at work to make the photocopy art work. I used a cheap $19 iron from a local
Re: [Homebrew_PCBs] etching with bubble tank
2009-04-26 by Adam Seychell
... I ve done bit of experimenting with bubble tanks. What I found is that if the tank is too wide then bubbles will tend to converge into streams causing the
Re: What is the best etching solution;
2009-04-26 by jj_winkel
... Here in France it is easy and cheap enough to get masonry grade H202 (35% in weight or 130 in volume)used for wood bleaching and stains removal, and HCl
best printer for pcb use
2009-04-26 by Howard
Hi all My epson printer has faild yet again !! can anyone tell me what laser printer is good for using with eagle cad software to print on Clear A4 OHP Film
etching with bubble tank
2009-04-26 by Brian
What is the best method to etch with a bubble tank. I have a 4 liter tank with a bubbler glued in the middle. Where do you place your board to be etched? I
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-26 by Adam Seychell
... Air regenerated CuCl2 has its benefits with permanent bubble etch tank installations, because it requires minimal handling of chemicals during its
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-25 by Alessio Sangalli
... Wel you throw it away all the times? I do not know how many boards you do everytime but it sounds like a waste to me...
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-25 by Alessio Sangalli
... I use a liter of H2O2 and half a liter of HCl. Put the H2O2 first and the muriatic acid on it, not the opposite they say. bye as
Re: [Homebrew_PCBs] Re: What is the best etching solution;
2009-04-25 by Jack Coats
What is the mix for the Hydrogen Peroxide, Muratic acid for a proper mixture ? (Yea, I m a newbie, so excruciating details are welcome.) IHS ... Jack
Re: What is the best etching solution;
2009-04-25 by jj_winkel
I am used to the H2O2 + HCL mix that s so cheap I use fresh mix everytime, but not to the CuCl one. What advantage is there using Cucl for casual needs, as it
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-25 by DJ Delorie
... Mine is in the same state, but I still check the pH and specific gravity once in a while, and occasionally add more HCl.
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-25 by Stefan Trethan
I m not sure about that. The CuCl is just sitting there, waiting for me to drop in a board all year round. It doesn t go bad or require me to mix up a new
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-25 by DJ Delorie
... Keep in mind that one benefit of the HCl/H2O2 etchant is it s reusable - but it gets converted to CuCl etchant, which is not see-through any more, and
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-25 by Derward Myrick
Alessio, I agree with you on this. I do not understand the people that say the other methods are better. Derward ... From: Alessio Sangalli To:
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-24 by Alessio Sangalli
... This wins HANDS DOWN It takes 4 minutes in my setup (without any kind of heating) It is transparent enough in my opinion to see what is happening. bye
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-24 by Mike Oyama
Ammonium persulphate is clear, but can not be regenerated, and can be a little finicky to work with if the ph and specific gravity aren t within certain
Re: [Homebrew_PCBs] What is the best etching solution;
2009-04-24 by DJ Delorie
... I ve used both of these. Started with FeCl, switched to CuCl (made from HCl+H2O2). Why? First, FeCl is getting hard to find locally. Second, FeCl
Re: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-24 by Volkan Sahin
I think so, if it is steel it should work. I tried with x-acto knife blade and it worked. You need to touch with steel to copper traces a few seconds then it
Re: Free bottle of Liquid Tin
2009-04-24 by Scott C.
What kind of flux are you using that you have to scrub off ? I use water soluable. Rinse off with hot water.
What is the best etching solution;
2009-04-24 by rickwendel763242
Muriatic Acid (28%) and Hydrogen Peroxid (3%)? Homemade stuff. Ammonium Persulphate. Powder? Liquid? Ferric Chloride? I hear that ferric chloride is the
Re: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-24 by Mike Oyama
Wow, Far out! I think I ll pick up one of those Electroless Nickel plating kits then. Could you use a wad of loose steel wool to activate the plating?
an 'instuctable' on PCBs
2009-04-24 by William Alford
http://www.instructables.com/id/Killer-PCBs/ This instructable demonstrates the process for making printed circuit boards with features as small as 0.005
RE: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-23 by Volkan Sahin
Hi Mark, Good idea. I was planning to use steel brush. I can try roller method, my only concern is if surface is not flat how to guarantee to touch all traces
RE: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-23 by Mark Mickelsen
Hi Volkan, Could you possibly rig up some sort of steel roller to go over the surface of the board to make starting the reaction easier and more thorough? I m
Re: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-23 by Volkan Sahin
Hi Mike, I used their electroless nickel kit. It works fine only problem is you need to touch every trace with a steel rod to start the reaction. Plating
Re: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-23 by Mike Oyama
I ve been thinking about picking up an electroless plating kit from caswell. The electroless nickel kits are 30% off till the end of the month, making the mini
Re: recommended thickness for boards
2009-04-23 by awakephd
Oops!! Sorry all -- that s amt33461. No affiliation, etc., etc. -- just got the link from this forum, tried it, and was very satisfied.
Re: [Homebrew_PCBs] Re: Free bottle of Liquid Tin
2009-04-23 by Stefan Trethan
The commercial liquid tin is little better, care is recommended. ST
Re: Free bottle of Liquid Tin
2009-04-23 by Dave
... You definitely get a better plating by using a electroless Tin plating. Using solder and an iron produces a bit of waviness or bumpy surface (not to
Re: recommended thickness for boards
2009-04-23 by pork_u_pine2000
... I tend to prefer boards .033 mil and thinner. I prefer to standardize the X x Y dimensions to Eurocard (160mm x 100 mm) (I think Eurocard is the correct
Re: Laser printer -- mono or color?
2009-04-23 by Chris Horne
Press-n-peel Blue works just fine in a conventional (non-straight) path laser printer.. I have run 100 s through an HP 1010. I certainly don t use a carrier
Re: [Homebrew_PCBs] Re: recommended thickness for boards
2009-04-23 by leon Heller
... From: Mike Oyama To: Sent: Thursday, April 23, 2009 7:14 AM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: recommended thickness for boards
2009-04-23 by Mike Oyama
Sorry, I thought that was what SRBP was. A little more research and I found this http://www.felsweb.com/lam_faq.htm#E which seems to explain things pretty
Re: [Homebrew_PCBs] Re: recommended thickness for boards
2009-04-23 by leon Heller
... From: Mike Oyama To: Sent: Thursday, April 23, 2009 2:59 AM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Reversing Top Copper Layer
2009-04-23 by Mike
Hello, That worked! Thanks for great information. ... -- 73, Mike, K4GMH [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] TIP120 Darlington
2009-04-23 by Joe
Thanks so much for that valuable information. I realize while I was reading, that a lot has changed since I went through electronics school 30 years ago.
Re: [Homebrew_PCBs] Re: recommended thickness for boards
2009-04-23 by Mike Oyama
4 layer boards require a really elaborate process involving very sophisticated laser drills, and a very laborious plating-through process. It s always
Re: [Homebrew_PCBs] Re: recommended thickness for boards
2009-04-23 by DJ Delorie
... You pre-drill the outer layers bigger before stacking them, so you can solder the inner layers with an iron.
Re: recommended thickness for boards
2009-04-23 by roycepipkins
When you do four layers, how do you connect to the internal layers? Regards, Royce
Re: recommended thickness for boards
2009-04-23 by awakephd
Is this eBay seller atmel33461? If so, I just bought some boards from him, and was extremely pleased. Not only was the price great, and the shipping very
Re: GBC H425 laminator question
2009-04-22 by jj_winkel
This laminator is a GBC Heatseal H425, it has a variable temperature setting knob that is graduated from 0 to 9 according to a laminating pouches thickness