Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-13 by Missouri Guy
OK, thanks Todd. Nasty fumes from the stuff!! I think I ll just stick with the Ferric Chloride....seems to be the most user friendly for occasional use.
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Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-13 by Todd F. Carney / K7TFC
If you re looking to make connections on a BGA chip, check out this breakout board from SchmartBoard:
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-13 by Todd F. Carney / K7TFC
... Charlie, I don t know anything about the photoreactivity of the mixture. The high UV from the sun probably does something. The stuff should definitely be
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-13 by Jan Kok
I use a Proxxon rotary tool and drill stand with #80 (.013 ) carbide drill bits, no problem. I don t have any drills smaller than that, so I can t say how it
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-13 by Missouri Guy
Todd, IMV, that makes more sense to me than to mix more exotic chemicals and it s easy to get. No need to make rocket fuel out of the H2O2!! :D) Lemme ask
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-13 by Todd F. Carney / K7TFC
My etchant is two parts by volume of 3% H2O2 and 1 part 35% muriatic (hydrochloric) acid. The peroxide is just the drug store/supermarket stuff. The acid is
RE: [Homebrew_PCBs] drill for micro drill bits
2013-03-13 by Jeff Heiss
From my measurements, it appears the shaft is not perfectly true and creates runout. The problem occurs when a regular PCB drill bit is used in a rotary tool.
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-13 by Peter Loron
Bosch Colt with a precision collet? Haven t used them myself, but may work for you: http://www.precisebits.com/products/equipment/bosch_colt_collets_nuts.asp
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-12 by Peter Harrison
Oops! 60vol would be 18% ... Peter Harrison peter.harrison@helicron.net
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-12 by Peter Harrison
Actually, Hydrogen Peroxide in strengths of 30% and upwards is potentially very unpleasant and becomes increasingly dangerous if not handled and stored
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-12 by Rick Sparber
Smilingcat, I bought a 50 pound bag of calcium carbonate a few years ago so tried using that. Seemed to foam up brown like the baking soda. I will keep adding
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-12 by lists
In article , ... Correct -- Stuart Winsor Only plain text for emails
Re: [Homebrew_PCBs] regarding hydrogen peroxide.
2013-03-12 by Eddie Stassen
Being safety concious is always good, but ffs you are not going to require amputation from a drop of peroxide on your finger. Whitened skin, some stinging or
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-12 by Todd F. Carney / K7TFC
Thanks for the chemistry lesson. I think I ll give the sodium carbonate a try if this checks out. As I recall from my homebrew photo developer days, regular
regarding hydrogen peroxide.
2013-03-12 by smilingcat90254
First of all, distilling hydrogen peroxide from pharmacy grade 3% VOLUME peroxide is relatively easy. I posted it some time ago and some one recently said it
Re: trying to do the right thing
2013-03-12 by smilingcat90254
Easiest disposal of CuCl2 solution. Since you don t know how much HCl is left in the solution, the best thing to do is to use Sodium carbonate. It can be
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-12 by casy_ch@tbwil.ch
Hello Todd Here I have quite a number of them since many years. No comparison with Dremel and other OEM Chinese drilling tools which are built for
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-12 by Todd F. Carney / K7TFC
Hey, KISS! Thanks for the Proxxon catalog. They ve got some nice-looking stuff. Do you own any of their tools? If you do, other than the runout issue, what do
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-12 by KeepIt SimpleStupid
Proxxon s rotary tool has 0.001 runout: http://www.proxxontools.com/store/pc/catalog/manuals/proxxon_catalog_micromot_us.pdf ... From: Jeff Heiss
Re: [Homebrew_PCBs] drill for micro drill bits
2013-03-12 by Todd F. Carney / K7TFC
Jeff, One problem I ve had in the past is trying to figure out what the source of the runout is with drills and drill presses. In this case, it could be the
drill for micro drill bits
2013-03-12 by Jeff Heiss
I am drilling holes with #96 (0.006 inch) drill bits. However, not one hole has been drilled because the bits are so small compared to the runout of the tool,
RE: [Homebrew_PCBs] PCB Milling bits
2013-03-12 by Boman33
I 100% agree that it is not cost-effective to grind my own bits but I like to know to be able to do it in an emergency while waiting for bits to arrive. Bertho
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Ron Yost
Heh! It s why I m here. :) Just ask them where the peroxide is. They have it labeled some cutesy name. ;) rY
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Todd F. Carney / K7TFC
Aha! I didn t think of the hair-bleaching angle! 73, Todd ... K7TFC / Medford, Oregon, USA / CN82ni / UTC-8 ... QRP (CW & SSB) / EmComm / SOTA / Homebrew /
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Ron Yost
... Sally Beauty Supply stores sell 30 and 40 vol. H2O2 (Hydrogen Peroxide). Ron Yost
Re: trying to do the right thing
2013-03-11 by Todd Carney / K7TFC
The H2O2 I get from the drug store all say 3% on their labels. It works very well and quickly in my H2O2+HCl etchant. I ve seen food grade H2O2 at 35% used
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Eddie Stassen
... I don t think you want to be anywhere near 90% H2O2, unless you are making rocket fuel. I had a bottle on 60% once, and it is truly evil stuff, oxidises
Re: [Homebrew_PCBs] PCB Milling bits
2013-03-11 by Les Newell
Just grinding a point then cutting off half the bit won t work as the cutter would have no clearance angle. You would get a really rough cut and quite likely
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Leon Heller
... 90% should be OK. Of course, you can do the same by bubbling air through the etchant. Leon -- Leon Heller G1HSM
Re: ...
2013-03-11 by Brian Pingree
http://www.centroduem.com/jrdzr/lrm/aylkw [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Todd F. Carney / K7TFC
Yes, ferric chloride is a mess. I m using a peroxide-hydrochloric acid etchant that I use in very small quantities (2oz) and then toss. In old darkroom terms,
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Riley
or just use an aquarium air pump to bubble plain old air through the solution :-
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-11 by Charlie Taylor
Well im sure you are correct but either way in the world of sewerage that is what the issue is with diaposing used ferric chloride. ... [Non-text portions of
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Missouri Guy
I m pretty sure that s the problem as well....heavy metals. I ve *heard* that when Western Electric was in business making telco products, that they were
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Todd F. Carney / K7TFC
Neither iron nor copper are actually heavy. Atomic number is part of the definition. Fe (iron): 26 / Ni (nickel): 28 / Cu (copper): 29 / Zn (zinc): 30. Each
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Charlie Taylor
fyi you can concentraye h202 by freezing it. skim of the remaining liquid and ditch the ice. Use the liquid as a more contrated h202 ... [Non-text portions
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Charlie Taylor
Yes i have been using 100% o2, only because its what i have around as my bubler. I have yet to exgaust my ferric and have used it quite extensivley. ...
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Rick Sparber
Leon, So is there a % concentration I should look for? Rick ... From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Leon
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Leon Heller
... The ordinary H2O2 you can buy is too dilute. You need the concentrated stuff. Leon -- Leon Heller G1HSM
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Rick Sparber
Leon, My chemistry knowledge is small. What does high-strength mean? Thanks, Rick ... From: Homebrew_PCBs@yahoogroups.com
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Rick Sparber
Russell, Thanks for the help. Rick ___________________________________________ By aerating the ferric chloride (possibly just with bubble etching like i do),
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Charlie Taylor
in my opinon the preasence of ferric is not the issue. It is tje heavy metals that is the peoblem. ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Charlie Taylor
It is the preaence of metals thatbis the problem for sewerage works. You are correct in that often ferric is used on treatment works as a floculant. ...
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Leon Heller
... Yes, copper kills the bugs that digest the sewage. Ferric chloride is actually used in water treatment. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-10 by Russell Shaw
... The ferric chloride i got was in a 60Lt bottle labelled Profloc F , and they said it was used in sewer treatment. I ve got lots left since i figured out
Re: trying to do the right thing
2013-03-10 by Dave Sage
Perhaps someone with some knowledge on public works and sewage treatment can clarify this for me. I guess it must be the copper in the ferric chloride etchant
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-09 by Leon Heller
... HCl and high-strength H2O2 will rejuvenate it. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-09 by Russell Shaw
... Steel wool will do nothing. You only use it when you want to create it in the first place. By aerating the ferric chloride (possibly just with bubble
RE: [Homebrew_PCBs] Re: trying to do the right thing
2013-03-09 by Rick Sparber
The bottom line of this article is to turn the ferric chloride into a solid and then just dump it. Any liquid removed can be poured down the drain. I like the
Re: trying to do the right thing
2013-03-09 by leeleduc
The end of this article talks about disposal. http://www.adafruit.com/blog/2009/01/25/the-chemistry-of-home-etched-pcbs/