Re: CuCl etching
2004-10-02 by Dave Mucha
... recipe ... I have ... necessary? ... it s HCL ... get the ... As I ... HCL I ve ... I store my HCL container inside of a 5 gallon plastic container with
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Re: [Homebrew_PCBs] CuCl etching
2004-10-02 by Stefan Trethan
On Sat, 02 Oct 2004 07:55:29 -0400, Anthony Toft ... You shouldn t store it airtight with oxygen left, it might explode the bottle.
RE: [Homebrew_PCBs] CuCl etching
2004-10-02 by Leon Heller
... It will probably speed it up. You aren t really using CuCl etchant, it s HCL and HO2, and can only be used once. If you treat it properly and get the
CuCl etching
2004-10-02 by Anthony Toft
I am going to be mixing a batch of CuCl etchant today using the recipe found on the group site. Basically 2:1 3% peroxide:Muriatic Acid. I have read that I
OHP Film & Laser Printers, UV Laser Diode
2004-10-02 by Thomas
Just a thought here .... has anyone tried to use OHP Film for an Inkjet run through a Laser Printer ? This CompuColor OHP Film has a Special Coating that turns
File - monthly.txt
2004-10-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line
Re: Question about developing a board
2004-10-01 by Dave Mucha
... products? ... I think the Decal method is really slow if you are taling about the self stick traces and pads. Toner transfer is the best cheap way to make
RE: [Homebrew_PCBs] Question about developing a board
2004-10-01 by Jan Kok
From: Bob Weiss [mailto:BWeiss@pressofac.com] ... Those negatives should work great. ... If you are in a reasonable sized city, you can get presensitized PCB
Re: [Homebrew_PCBs] Question about developing a board
2004-10-01 by Les Newell
If you are buying board from Mega then I would recommend their Microtrak board rather than the Fotoboard. It is the same price but it seems to be more tolerant
RE: [Homebrew_PCBs] Question about developing a board
2004-10-01 by Leon Heller
... I use NaOH solution for developing (very cheap) and a UV exposure unit I built myself, with pre-coated boards (positive-working resist). Negative-working
Re: board isolation cut-outs
2004-10-01 by Dave Mucha
... isolation ... Yeah, from what I have read, it looks like two or three boards. The primary is just a long string of reistosrs. each about 3.5 long.
Question about developing a board
2004-10-01 by Bob Weiss
I made a couple PCB s awhile ago using the decal method and never want to go through that again!. Well anyway, I have access at work to a film printer (work at
Re: board isolation cut-outs
2004-10-01 by thespeakerguy
Rule of thumb I ve used over the years 10 volts per mil of isolation on FR4. 15kV then equals 1.5 gap
Re: [Homebrew_PCBs] board isolation cut-outs
2004-09-30 by lists
In article , ... Is your 300V ac or dc? What is the source impedence of the 15kV. Never mind the PCB what are you going to use for
RE: [Homebrew_PCBs] board isolation cut-outs
2004-09-30 by Jan Kok
I won’t comment on isolation gaps, but I have a few other tips that may be of use. I m assuming that you are creating a voltage divider (say 2.94M + 49.9K),
Re: [Homebrew_PCBs] board isolation cut-outs
2004-09-30 by mickeym
Try this page for creepage and clearance distances: http://www.harkis.harting.com/WebHelp/EGds/WebHelp/GBgdsCreepage_and_clearance_distances.htm Clearance is
Re: [Homebrew_PCBs] Re: Laser Printer mods & Laser's
2004-09-30 by Stefan Trethan
... Not 100% true, but 50%. remember? i printed on aluminum foil and 50% still transferred due to gravity and pure luck. No enough toner with my machine, 50%.
RE: [Homebrew_PCBs] board isolation cut-outs
2004-09-30 by Leon Heller
... A transient suppressor will deal with spikes. 5V ones are available - try Googling for TransGuards . Leon
Re: [Homebrew_PCBs] board isolation cut-outs
2004-09-30 by ron amundson
Any idea of the rise time and duration of the 15KV spike? Spark gaps or quench tubes can be useful , but they are slow, and can raise much havoc if not
board isolation cut-outs
2004-09-30 by Dave Mucha
Hi all, I m looking to measure a 300 volt line and drop it to 5 volts. One of the many problems is that there is also the potential of a 15kV spike on the
Re: Laser Printer mods & Laser's
2004-09-30 by Phil
thanks dwayne, I was refering to direct to copper resist printing. a theoretical exercise today. I m getting great registration for double sided toner
Re: [Homebrew_PCBs] Re: Laser Printer mods & Laser's
2004-09-30 by Dwayne Reid
... I ve previously mentioned (many times) the simple technique we ve been using for more than 20 years: Take a scrap of copper clad PCB material and make an L
RE: [Homebrew_PCBs] Re: Laser Printer mods & Laser's
2004-09-30 by Dave Hylands
Hi Phil, Most of this mis-registration is caused by the paper changing size. The misregsistration is much more noticable in humid climates, than in dry
Re: Laser Printer mods & Laser's
2004-09-29 by Phil
One thing that hasn t been mentioned in the list of problems to crack is alignment for double sided resist application. I know that if you take a piece of
Re: Laser Printer mods & Laser's
2004-09-29 by Dave Mucha
... etching ... This is incorrect. Half of this list if filled with people who use laser toner as a resist on a weekly basis. It is THE simple way to get
How a copier works
2004-09-29 by crankorgan
http://home.maine.rr.com/randylinscott/copier.htm
Re: Laser Printer mods & Laser's
2004-09-29 by Phil
... really? all this time I must be imagining toner transfer.
Re: [Homebrew_PCBs] Re: Laser Printer mods & Laser's
2004-09-29 by Thomas
Hi there must be a bunch of folk working on this PCB thing try n to perfect the process with Lasers and InkJets thats for sure, I have a cheapo Canon S200SPx
Re: Laser Printer mods & Laser's
2004-09-29 by #@!%! Herzog
The real problem is that the toner is unlikely to resist the etching solution. Inkjet ink probably will no resist corrosives either. The best way to do this
Re: Laser Printer mods & Laser's
2004-09-29 by Dave Mucha
... to print directly onto the PCB with Toner ? ... expose the Photoresist coating on a Presensitised PCB as I have a small XY table that would be suitable for
Re: [Homebrew_PCBs] Press-n-Peel Dry Blue Opinions
2004-09-29 by Derryck Croker
... It s meant to be used with a domestic iron, but I never had much luck with that. A better approach is to use a laminator to tack the PNP to the copper
Re: [Homebrew_PCBs] Re: Press-n-Peel Dry Blue Opinions
2004-09-29 by Kev Pearce (kevp.com)
Thanks for all the input guys. It as I suspected, a bit of a trail and error game. It sounds like a good starting point for me as a first timer (using this
test
2004-09-29 by Etchenique Fabian
pls ignore
Re: Press-n-Peel Dry Blue Opinions
2004-09-29 by javaguy11111
I have used PNP Blue for all my boards and when used with a laminator I have gotten good results. I have not tried the magazine paper method, but I seem to
Re: Making the simplest board
2004-09-29 by grantfair2001
Several months ago I found I was going through many Radio Shack soldering iron tips very quickly. I then found some Kester Ultrapure Tip Tinner - it has no
Re: advice on CuCl etchant?
2004-09-29 by Phil
yeah, found cheaper - $15/4 oz (approx 25 cL). I had to add a fair amount of acid and about 1.5 oz of the H2O2 to get etching. Still too expensive but the
Laser Printer mods & Laser's
2004-09-29 by Thomas
Hi All Has anyone done or know if its possible to modify a Laser printer to print directly onto the PCB with Toner ? or would a Regular Laser Beam Like those
Re: Press-n-Peel Dry Blue Opinions
2004-09-28 by Phil
A long time ago, I got some of the PNP stuff. It was hard to use and I finally gave up, never actually getting a usable PCB with the stuff. Last year, hearing
Re: [Homebrew_PCBs] Re: Making the simplest board
2004-09-28 by John Baker
Well that you all for all the tips. I will try out these suggestions. Best regards, John Baker ... From: ben_englund To:
Re: [Homebrew_PCBs] Re: advice on CuCl etchant?
2004-09-28 by Les Newell
Hi Stefan, I bought a lot of acid because I use it for removing rust as well. I also bought sulphuric acid for anodising and a number of other chemicals. Les
Re: [Homebrew_PCBs] Press-n-Peel Dry Blue Opinions
2004-09-28 by Stefan Trethan
... feeling: Why pay ridiculously high sums for pnp when you can get ol paper from the office shop around the corner that works just as well? ST
Re: [Homebrew_PCBs] Re: advice on CuCl etchant?
2004-09-28 by Stefan Trethan
... That s a mean price. i think i could get it mail order for roughly double of what i pay locally. (means ~12eur/l). keep looking. ST
Press-n-Peel Dry Blue Opinions
2004-09-28 by Kev Pearce (kevp.com)
Hi all, What do people think of Press-n-Peel Dry Blue? I ve been reading lots of talk of other systems but for convenience these look like a proven of the
Re: advice on CuCl etchant?
2004-09-28 by Phil
thanks, I m finding 30% H2O2 but at like $70/500 mL. That s not worth it to me, I d rather buy Ammonium Perchlorate powder at $25/kg. Its quite a new
Re: [Homebrew_PCBs] Re: advice on CuCl etchant?
2004-09-28 by Les Newell
Hi Phil, I got it from an internet chemical supplier, along with the acid and copper oxide. Their minimum order is something like 50UKP so it is not practical
Re: [Homebrew_PCBs] Re: advice on CuCl etchant?
2004-09-28 by Stefan Trethan
On Tue, 28 Sep 2004 14:22:59 +0100, Les Newell ... That must be huge amount of acid and H2O2 for ~~100eur. I got it from a local
Re: new paper, great results
2004-09-28 by Phil
I just uploaded 2 pictures in files/toner_transfer/ - TT-1.jpg and TT-2.jpg These are 10X microscope pictures of a TT board with the paper I reported on.
Re: advice on CuCl etchant?
2004-09-28 by Phil
... Thanks, Les. Where did you get your H2O2? Phil
H200 jamming problem and fix
2004-09-28 by Phil
Since my etchant wasn t working, my laminator decided to screw up too. when it rains it pours... The H200 started jamming when I fed a board+paper assembly
Re: advice on CuCl etchant?
2004-09-28 by Phil
Thanks for all the suggestions - the solution is not olive at all. It appears to be a clear, bright green. I would have called it lime green but its not