Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Leon Heller
... Mega Electronics can supply a big bottle of tinning powder, presumably made from those ingredients. I ve got one but haven t tried it. It just needs to be
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Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Alessio Sangalli
... I have found the following sources, could you have a look and see if they look OK? 100g Stannous Chloride, $8.46
Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Alessio Sangalli
... ahahah iphone shaped, who cares :) It seems a very nice device. Now, if I only could find those chemicals... bye as
Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Stefan Trethan
Why not buy a chinese scale? 0.01g resolution 300g max: I didn t select the cheapest 0.01g scale because this
Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Alessio Sangalli
... Where do you get the chemicals? Also, do you have a very precise scale? My kitchen scale can theoretically meausure with the precision of one gram but how
Re: Now, tinning
2010-07-21 by designer_craig
I have very good luck with elctroless tin. The formula I use came from the September 1971 issue of Ham Radio magazine. .5g Stannous Chloride 2.0g Thiourea
Re: [Homebrew_PCBs] Re: Now, tinning
2010-07-21 by Alessio Sangalli
... I was already interested in a hot plate. Could you point me to a suitable one for 16x10cm boards? Also, which kind of brush would you recommend? bye! as
Re: Now, tinning
2010-07-21 by Andrew
Alessio, I suspect the best answer is something like the TINNIT approach, but ... I have gotten reasonable results using a hot plate rather than just a
Re: [Homebrew_PCBs] Now, tinning
2010-07-21 by Alessio Sangalli
... No; have you? Is it good? From the web I read once you open it it lasts 2-6 months. Do you know if it s possible to use less and prepare a very small
Re: Inkjet or Laser for PCB work?
2010-07-21 by gnuvvekaavaali
... Thanks to James Newton for collecting all this info - http://techref.massmind.org/techref/pcb/etch/directinkjetresist.htm
Re: [Homebrew_PCBs] Inkjet or Laser for PCB work?
2010-07-21 by P COUNSELL
I have a very good dos program CADPAK and I use an old rowland DXY-880A plotter. Results are fantastic . I modified the height of the plotter pen to accomodate
Re: [Homebrew_PCBs] Inkjet or Laser for PCB work?
2010-07-21 by Leslie Newell
Flatbed plotters are available. I have tried this approach and never found a good solution. The main problems were that the ink tends to creep so you don t get
Re: [Homebrew_PCBs] Inkjet or Laser for PCB work?
2010-07-21 by Bob Butcher
I have had a lot of trouble with toner transfer as well. My Brother 1440 laser printer toner will not release reliably from any paper I have found. I have
Inkjet or Laser for PCB work?
2010-07-21 by gnuvvekaavaali
I am looking for suggestions on the choice of Inkjet (for direct inkjet printing) or laser printer (toner transfer) for the occasional single sided PCB. I
Re: [Homebrew_PCBs] Now, tinning
2010-07-21 by Athar Kaludi
Can anyone post a photo showing before tinning and after tinning result Specially by TINNIT and result with home made tinning solution.[Thiourea SnCL2 H2SO4]
Re: [Homebrew_PCBs] Now, tinning
2010-07-21 by David Griffith
... Have you tried a cold tinplate solution like Tinnit? -- David Griffith dgriffi@cs.csubak.edu A: Because it fouls the order in which people normally read
Now, tinning
2010-07-21 by Alessio Sangalli
Hi, as I am perfectioning my PCB making, I reached a point where I can do very good boards, but especially if I am making a bigger, double-face one, with huge
Basic ACF or Z-Conductor Testing
2010-07-21 by javaguy11111
Basic ACF or Z-Conductor Testing I did some basic testing today with making some anisotropic conducting film(ACF) or Z-conductor material today.This is
Re: Multi-Layer PCBs
2010-07-21 by alienrelics
The solder will bead up rather than forming a thin layer across the layers. Or did you mean for the holes to stay filled with solder? You ll still need to do
Re: Multi-Layer PCBs
2010-07-20 by James
... I regularly and dependably do 10 mil tracks with 603 and 805 size components. I can do SSOP ICs but that s pushing it and generally requires a bit of hand
Re: Multi-Layer PCBs
2010-07-20 by James
... I ve contemplated trying just to see if I could do it, my thought was to use solder paste to interconnect traces on the layers and cook the board on a hot
Re: Be Careful with ExpressPCB
2010-07-20 by James
... I noticed that as well, though it was usually not enough to be a problem. Kicad as well as other packages I tried out did not do that, I suspect it is done
Re: Board heat up time
2010-07-20 by James
... I suspect the difference comes down to toner, I lucked out and the stuff in my current printer seems to melt at a relatively low temperature and bond very
KINSTEN THRU HOLE...USER
2010-07-20 by Athar Kaludi
The process offered by KINSTEN Taiwan for thru plating is shown in link below. If any one using just help me providing info on the GEL which the person is
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-20 by Howard Chester
Hello from a new member, just a small thanks to the arbitrator for having me in your group. On the matter of plating through holes, I recently read an article
Re: Multi-Layer PCBs
2010-07-20 by hughaw
1) I don t think that you would get an even spread. A simple experiment would be to place a thin copper wire in a clear tube and proved the current from a
Re: Reverse plating (electro etching)
2010-07-20 by jcarlosmor
The author of that article states: As I stated above, I have been using this process for over 25 years but in that time I have never seen this process used
KINSTEN THRU HOLE...
2010-07-20 by ceo_premium
The process offered by KINSTEN Taiwan for thru plating is shown in link below. If any one using just help me providing info on the GEL which the person is
Reverse plating (electro etching)
2010-07-20 by Jim
I just stumbled onto a web site ( http://www3.telus.net/chemelec/Projects/Etching/Etching.htm ) that uses a reverse polarity electro plating to etch a PCB. He
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-20 by Branko Badrljica
With the exception of multilayer bit, I don t see anything special on your pictures. Those tracks are somewhere around 8-10 mils, which is easily achievable at
Re: Multi-Layer PCBs
2010-07-20 by Richard
.... another approach: As I had mentioned,the SMDs and ICs component sizes that I am using are so small,I have abandoned trying to make very small,
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-19 by Branko Badrljica
AFAICS, main problem is hole metalisation. Couldn t this be achieved by pure force- by running excessive current through thin copper wire, which would vaporize
Re: Multi-Layer PCBs
2010-07-19 by ae5ew
This was an interesting read. www.instct.org/secure/downloads/HowIsAPCBMadeICT_V5.pdf It does a good job answering my question. Charles AE5EW
Re: Multi-Layer PCBs
2010-07-19 by ae5ew
Thanks. Charles AE5EW
Re: [Homebrew_PCBs] Multi-Layer PCBs
2010-07-19 by DJ Delorie
I ve done some home-brew 4-layer boards, but without plated-through holes. It s tricky, you need to design for it, leaving plenty of room on the outside
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-19 by Hugh Weinrich
As a designer and user PCB s in the 16-20 layer area, I would advise that once you leave the 2-layer design, and move to a 4-layer design; the
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-19 by Harvey White
... No. The best way I have heard to do this is to overdrill the blind vias on the top and bottom layers, then wire jumper to the inner layers. Standard vias
Re: [Homebrew_PCBs] Re: Multi-Layer PCBs
2010-07-19 by William Laakkonen
http://www.hottconsultants.com/tips.html has a section on how and why of multi-layer board construction. The layers are generally not added for the sake of
Re: [Homebrew_PCBs] Multi-Layer PCBs
2010-07-19 by Simao Cardoso
... Difficult to see is how the layer stack is interconnected. Some images of vias, blind vias, buried vias, filled vias from a quick search
Re: Multi-Layer PCBs
2010-07-19 by ae5ew
I m not considering doing such a thing. Curious to understand how a reliable connection is assured in such a PCB. My experience as a technician has exposed me
Re: [Homebrew_PCBs] Multi-Layer PCBs
2010-07-19 by Dylan Smith
... Via a via :-) I presume you re talking about through hole components, in which case the via that forms the hole the IC pin goes through. For SMD, a via
Re: Multi-Layer PCBs
2010-07-19 by ae5ew
Is anyone routinely making their own 4-layer PCBs. Charles AE5EW
Multi-Layer PCBs
2010-07-19 by ae5ew
Ok. I admit I m ignorant when it comes to this subject. How is an IC lead connected to say layer 8 on a 16 layer PCB. I m only using this as an example. The
Re: GBC laminators
2010-07-18 by sailingto
I ve been away for a few days - purchased a new house and moving hassles. I do hope this is the last move ever - I ve swallowed the anchor! Plenty of space
RE: [Homebrew_PCBs] Be Careful with ExpressPCB
2010-07-18 by Tony Smith
... I run the sheet of paper thru the printer a couple of times to shrink it. Open Notepad, press the space bar a couple of times and then hit print. Then
Re: [Homebrew_PCBs] Be Careful with ExpressPCB
2010-07-18 by Leon Heller
... And, it s likely to vary with humidity. Paper is very hygroscopic (I worked for Rank Xerox many years ago, and it was a problem, we even supplied some
Re: [Homebrew_PCBs] Be Careful with ExpressPCB
2010-07-18 by Slavko Kocjancic
... ...and my one skew image too. (rectangle come out trapezoid). In small scale but as you say long items is hard to assemble. (and if drilling is made with
Re: [Homebrew_PCBs] Be Careful with ExpressPCB
2010-07-18 by DJ Delorie
Are you sure it s the software, and not the printer? My laser printer shrinks *everything* about 0.4%, which is enough to make big connectors not fit in their
Be Careful with ExpressPCB
2010-07-17 by Steve Maroney
I m not sure why this happens or if anyone else has experienced this but sometimes ExpressPCB will slightly shrink or enlarge the job being printed. Most of
Re: GBC laminators
2010-07-17 by jp.gleyzes
Hi again Just for (my) pleasure, I have done another pcb. It s working really so well. The result is pretty much perfect. I am really impressed by the huge