Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-26 by Mike Putnam
Grant, Lye is a common name for potash. you might find better results with a search for potash. It is commonly used for gardening in fertilizers. Best regards,
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Re: [Homebrew_PCBs] Re: Stirring or pumping etchant
2003-04-24 by Stefan Trethan
yeah maybe in the patent drawing but in practical use it seems suficcient (and i also would guess that) to use a top closed piece of pipe and drill some holes
Re: Stirring or pumping etchant
2003-04-24 by Steve
In the patent drawing posted, it appears that the boards revolve, also, and that there are centrifugal pumps on the bottom of the shafts that pull etchant down
Eyelets
2003-04-24 by Neil
Hi all, Anyone know a source of pcb thru-hole eyelets and the corresponding tool in the U.S.? Cheers, -Neil.
Re: [Homebrew_PCBs] Re: Stirring or pumping etchant
2003-04-24 by Markus Zingg
... No, you are wrong. The gyroforce resulting from the turning tube is sufficient. The structure you refer to is exclusively here to cool the motor. ...
Re: Stirring or pumping etchant
2003-04-24 by rolanyang
From looking at this graphic on their website: (bottom one) http://www.bungard.com/material/left_4.gif It appears that the ethchant is drawn up into the tube
Bungard website
2003-04-24 by twb8899
I really liked the equipment shown on the Bungard website. The photoplotter they make looks interesting. Didn t fill out their info sheet to get the price list
Re: Sani Flush - is it lye (sodium hydroxide)?
2003-04-24 by grantfair2001
Thanks to all who posted about lye and SaniFlush. I never did find out if SaniFlush is lye (and nothing more but some perfume). However, I did track down some
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-23 by adam Seychell
That s an interesting mechanism of pumping fluids. After Markus mentioned Bungard and patents I had a quick search The bungard site is
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-23 by Stefan Trethan
23.04.2003 17:27:08, Markus Zingg wrote: hi the three holes, are they straight through or are they at an angle drilled? (and please stay with
Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by Stefan Trethan
NaOH can be obtained as pcb developer i think? quite cheap with correct recepie for pcb on label and in small granulate which is very handy. maybe go to the
OT was Re: part ID
2003-04-23 by Steve
You should ask on a list where it is on topic, such as: http://groups.yahoo.com/group/Advanced_Electronics Steve, the mod moderator ... -snip OT post-
Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by kenneth magers
be carefull in the usa this is a key chemical used for meth drug production so most places will give you the run around when you ask for it or about it same
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-23 by Markus Zingg
Hi Stefan ... The tube is closed with a plate at the end where it s delved into the Fe3Cl, but the plate is having three holes. The diameter of the holes is
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-23 by Stefan Trethan
hi this link is great! as i m from austria it won t be a problem buying. but i m also wondering if you may describe the function of the spray tubes more
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-23 by Markus Zingg
Hi Group This is my first time post here, so please forgive me in case this is already known. However, there is a small german company selling very low priced
Re: [Homebrew_PCBs] CuCl etchant is progressing
2003-04-23 by Adam Seychell
I m glad to see its finally working. As I learned on the weekend, the bubbles is what makes the process move forward. It was a bad idea to initially let the
Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by Adam Seychell
The container label should have written on it 98% (or there about) sodium hydroxide. Caustic Soda is also synonym. Some drain cleaners are just a mixture of
Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by Russell Shaw
... I ve seen it sold as garage/concrete floor cleaner in hardware shops.
Re: [Homebrew_PCBs] Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by Leon Heller
... From: grantfair2001 To: Sent: Wednesday, April 23, 2003 4:58 AM Subject: [Homebrew_PCBs] Sani
Sani Flush - is it lye (sodium hydroxide)?
2003-04-23 by grantfair2001
I have been unable to find any plain lye at the local supermarkets. Does anyone know if Sani Flush is just perfumed sodium hydroxide (and therefore suitable
CuCl etchant is progressing
2003-04-23 by grantfair2001
I am happy to say that I can now see unmistakeable signs of progress with my etchant. I now have about 17 litres of it, in a 34 litre Coleman cooler, gugrgling
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Mike Putnam
Adam, yes I know what you mean about the vertical hobbyist kit tanks. The air holes are spaced too far apart in them. Actually, I did try a homemade horizontal
Intro
2003-04-22 by Neil
Hi all, New to the list here, and my first post. Quick intro... Electronics hobbyist for many years, on and off. Love digital electronics and
Re: [Homebrew_PCBs] Stirring or pumping etchant
2003-04-22 by Leon Heller
... From: Jan Kok To: Sent: Tuesday, April 22, 2003 7:57 PM Subject: [Homebrew_PCBs] Stirring or pumping
Stirring or pumping etchant
2003-04-22 by Jan Kok
Some ideas I haven t tried: Use a stainless steel stirrer such as is used for making milk shakes. Make some stirrer vanes out of suitable plastic, drive them
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Simon Whitehead
Just an idea for pumping etchant... What about a peristaltic pump? The ones I have seen use a silicon rubber tubing and good for all sorts of fluids. Simon
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Leon Heller
... From: Stefan Trethan To: Sent: Tuesday, April 22, 2003 9:59 AM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Stefan Trethan
I m wondering if anyone has thought about spray etching... this may give uniform etch, may be very fast and may also regenerate the etchant. but i have no idea
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Adam Seychell
Hi Mike , welcome to the list. The ferric chloride is well know among DIY PCB etching. The air regenerated CuCl2 etching is new to me and seems like a nice
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-22 by Mike Putnam
Hello Group, I am a new subscriber to the group and have been following the thread for a few days. I closed down my etching services about two years ago,
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-21 by Adam Seychell
... HCl won t react with Cu without oxygen present. The initial 67g Cu + 100g 38% HCl won t do anything. It also don t need to be that complicated or precise
20 pcs single side board
2003-04-21 by jenny@cadagile.com
Hi, Recently we are doing a project; we do the PCB design, now we need somebody to make the board and prototype. Is any body interested to make the board? Best
Re: Cu + HCl -> CuCl2 : part 3
2003-04-21 by grantfair2001
Hi Adam - my chemist friend (who, incidentally, grew up near Bondi beach) advised me some time ago to try this recipe. I did not get past trying some copper in
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2 : part 3
2003-04-21 by adam Seychell
I did another test. This time I simply put clean copper metal in the 20% acid and bubbled lots of air through it. It took just over 3 hours to completely
Re: [Homebrew_PCBs] Re: Cu + HCl -> CuCl2
2003-04-20 by adam Seychell
... Good point. I m certain there is probably some very important variable(s) that I do not know of yet, and maybe I just happen to fluked upon it. I suspect
Re: Cu + HCl -> CuCl2
2003-04-20 by grantfair2001
Hi Adam - My etchant continues to slowly progress. It seems that some variable at this end differs from your approach. Nevertheless, the solution has slowly
Re: [Homebrew_PCBs] Peroxide and sulfuric sources
2003-04-19 by Stefan Trethan
nice offer and i would buy some if you are near me but i fear shipping would be far more expensive then buying new. but i have read the following: degrading of
Peroxide and sulfuric sources
2003-04-19 by twb8899
I have a drum of food grade 35% hydrogen peroxide at my shop if anyone is interested. We could put it in gallon jugs for shipping but I m not sure about UPS
Health food H2O2 in the US
2003-04-18 by Bill Higdon
Ok, Here are a couple of links about it s use by the health food groupies , This was from a quick Google search using hydrogen peroxide health foods
Re: [Homebrew_PCBs] Re: Etching with sulfuric acid and hydrogen peroxide
2003-04-18 by adam Seychell
... Stefan, you might be interested reading articles on http://www.h2o2.com/ :) ... From what I ve read the reaction of copper with sulfuric acid / hydrogen
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by Stefan Trethan
what people do to their / their childrens body only because it sounds modern (don t find the really suitable word here because i m tired, its late, and my
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by Bill Higdon
Stefan, I can remember someone having to take their child into an emergency room after they gave the child some. For a while it was a big thing to improve
Re: Peroxide sources
2003-04-18 by rolanyang
Swimming pool suppy stores sell high concentration peroxide. ~Rolan
Re: [Homebrew_PCBs] Peroxide sources
2003-04-18 by Stefan Trethan
i really believe it may be available through haircutteres supply. i wanted to ask the guy who s relatives is someone a haircutter but can t reach him. i ll ask
Peroxide sources
2003-04-18 by Bill Higdon
I just had a brain fart folks. Some of the health food stores used to sell Hydrogen Peroxide, cant remember if it was 10% or 30%. Might be a good source for us
Re: [Homebrew_PCBs] Re: Etching with sulfuric acid and hydrogen peroxide
2003-04-18 by Stefan Trethan
hmm two questions arised now: first i have to inform myself about stabilizers and how long they may be useful to conserve the H2O2. i don t assume they would
Re: Etching with sulfuric acid and hydrogen peroxide
2003-04-18 by twb8899
Stefan, We never tried using hydrochloric acid in our shop so I don t have any ideas on that process. Most PWB shops electroplate a metallic resist such as tin
Re: [Homebrew_PCBs] Re: using Laser Iron-on with ljIII
2003-04-18 by Stefan Trethan
NO! thats all i can say about changing my printer (and buying a new one).
Re: Electrolysis & Commercial Contributors
2003-04-18 by Nedtron
Greetings, The electrolysis would be far more effective with 3Vdc than with 6Vac. A full wave bridge rectifier in conjunction with the 6Vac transformer would