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2004-04-23 by Stefan Trethan
... well, it s not exactly what you would want for SMD but it is nice. looks to me as if tracks between 100mil dil are already a problem. Another thing is that
2004-04-23 by Stefan Trethan
... no, i get copper with no hydrogen too. I aim for a area ratio that starts to produce hydrogen and chlorine at the same time, and then use current slightly
2004-04-23 by Steve
Pen Plotter direct etch resist Italian site. Follow the link to see the etched board. Looks very good. http://info.supereva.it/mauroh.mybox/home.htm?p Just
2004-04-22 by Adam Seychell
... Excellent work, you now have a starting figure for the current density of graphite anodes. In practice you may need less current density to keep long life
2004-04-22 by ballendo
Ron, I interested in a couple things you bring up... Snips, Questions below ... What were the problems with the chemically etched compared to laser cut? IOW,
2004-04-22 by Stefan Trethan
Did some experimenting... I have now etched away the copper of both welding rods, which nicely saturated my etchant too... 1 rod is 8mm * 22cm i think which is
2004-04-22 by Ron Amundson
... $75 is pretty cheap for stencils, well worth the laser cut ones, it will save you much agravation. In the past, one could get chemcially etched stencils,
2004-04-22 by Russell Shaw
... I ve heard that phosphorized pcb copper etches easier. I ve found that copper shim stock is much harder to etch in FeCl than pcb copper, so small additives
2004-04-22 by Phil
use a gerber app. I use Pentalogix Viewmate (free, google for site). Use the CAM processor in Eagle to output gerber rs247x files. You can import multiple
2004-04-22 by Vasile Surducan
... would you so kind and tell me which CAD are using ? I m using Eagle now, but it seems there is no panelisation possibilities... Copying and paste all
2004-04-22 by Adam Seychell
... I have no idea, but according to my references, the copper anodes should contain about 0.05% phosphor. I think phosphor is only important when using
2004-04-21 by Dave Mucha
... I looked at Pad2Pad, but they are similar to Express. As long as your parts fit their structure, you are allowed to use them. I have some 57 dia holes
2004-04-21 by mpdickens
... Why not etch your own stencil using fecl, cucl or whatever etchant you already have? You could take a piece of thin copper, photo sensitive it with an
2004-04-21 by Leon Heller
... From: Dave Mucha To: Sent: Wednesday, April 21, 2004 1:24 PM Subject: [Homebrew_PCBs] Re: Pick and
2004-04-21 by mpdickens
I have been attempting to find a cheap source of phosphorized copper (Deoxified copper) for thru hole plating. I know that phosphorized copper anodes are
2004-04-21 by Phil
Maybe an inductor... However, I think the reasoning goes - if you are making one trace (er connection) that can carry a lot of current, you will need a
2004-04-21 by Vasile Surducan
... Hi Dave, I don t know if this may help you: http://www.pad2pad.com/company/index.php http://www.olimex.com best regards, Vasile
2004-04-21 by Dave Mucha
... I am in the same boat. I have about 10 boards with smt parts that I would like to get done. The next bunch will hopefully be 100 boards and then after
2004-04-21 by Willy Gooris
Hi, Do you really think You make capacitors? I thought that the definition of a capacitor is: two conductors separated by a nonconductor. The last part is
2004-04-21 by Vasile Surducan
... actually this wouldn t be an impediment but an improvement for the supply lines... top 10 wishes, Vasile http://surducan.netfirms.com
2004-04-21 by Stefan Trethan
... shorted capacitors... wow.. wonder what the capacitance may be.. must be huge.. ST
2004-04-21 by ballendo
... Be careful! You re making capacitors... Ballendo
2004-04-21 by ballendo
jtm, Don t have a website for you, but do have a couple suggestions. Instead of looking for a general solution: Talk to the folks you would have
2004-04-21 by mpdickens
... You got me on that one: I keep a cheat sheet with the fractions that I would have a reason to use and are rediculously long :) Marvin ===== Registered
2004-04-20 by mpdickens
... Using the weight per square inch (Or centimeter or whatever) the thickness can easily be determined. Regards Marvin Dickens ===== Registered Linux User No.
2004-04-20 by John Johnson
... Man I hope so. This is getting really old. Inches have been based on SI since 1887 or so. Regards, JJ
2004-04-20 by Stefan Trethan
... Come on Marvin, you ain t knowing the conversion ratio from gram to ounces with 8 decimals after the comma, without thinking ? I bet one free google
2004-04-20 by mpdickens
... Both systems are taught in the schools here in America, so I knew the answer without thinking about it. Besides, I could not help myself when I saw your
2004-04-20 by Stefan Trethan
... well, you need the specific gravity... In metric system even that would be darn easy... thanks for putting the calc int he links section steve. Found the
2004-04-20 by Stefan Trethan
... Thank you very much Marvin, i thought the line of course i can find out would prevent people from being too helpful... I know it is simple to convert
2004-04-20 by Stefan Trethan
... But don t do that with HF currents, the skin effect will displace your current to the wall and you effectively increase the resistance. Have read this
2004-04-20 by Steve
... Yes, but how thick is that? 1 ounce / square inch? If so, how thick is that? 1 ounce / square foot? Steve
2004-04-20 by Dave Mucha
... http://www.geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm ... Yup, that s the calculator I use too. Don t forget that you can tin the trace and make
2004-04-20 by mpdickens
... 1 gram is 0.03527396 ounces. Regards Marvin Dickens ===== Registered Linux User No. 80253 If you use linux, get counted at: http://www.linuxcounter.org
2004-04-20 by mdgolfbum
Is there a website that describes rules for layout that will ensure adequate spacing for pick and place machines? I m doing a few by hand but if the project is
2004-04-20 by Stefan Trethan
... I ask this question myself pretty often. Which genius had the idea to measure a layer thickness in weight? What is is? oz/sq feet, or sq inch, or whatever?
2004-04-20 by Stefan Trethan
You can find such things in design rules in the links section. ST On Mon, 19 Apr 2004 22:32:37 -0400, Anthony Toft
2004-04-20 by Phil
http://www.geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm
2004-04-20 by ballendo
Hello, The bible for pcb design is Printed Circuits Design by Gerald Ginsberg. Published by McGraw Hill, I paid 5 bucks for myt copy of the 91 edition.
2004-04-20 by Anthony Toft
is there a formula for how wide tracks should be? I need to make tracks capable of carrying 7+A at 12v How fat should they be? -- Anthony Toft
2004-04-19 by wheedal99
... I remember someone suggesting ink jet water slip paper that modelers use for decals. That would get you color as well as speed. Still would have
2004-04-19 by Phil
... component ... silkscreen. ... certainly ... amen! no, its confusing to native english speakers as well. I prefer legend since its not just outlines, names
2004-04-19 by Stefan Trethan
really got some carbon welding rod at the tool shop. is 8mm dia, 22cm long, copper coated just as you sayd. cost 1,2eur a piece. bought 2 and 1 is already
2004-04-19 by Stefan Trethan
On Mon, 19 Apr 2004 08:45:29 -0500, Brian Schmalz ... PLEASE can we switch over to calling it component outline or component legend. a
2004-04-19 by Brian Schmalz
I ve always wanted to do silkscreen plotting with my HP plotter. However, I don t know where to get an ink that will withstand the heat of soldering. Anybody
2004-04-19 by Leon Heller
... From: John Johnson To: Sent: Monday, April 19, 2004 11:40 AM Subject: Re: [Homebrew_PCBs] silkscreen
2004-04-19 by John Johnson
On one board I did, I printed the silkscreen layer on my ink jet onto paper. When the board was finished and inspected, I glued it down on top of the board
2004-04-19 by Stefan Trethan
... i have taylor-made a vertical tank to fit it. i also have a big test tube where it fits perfectly. But is can now stay in the tank permanently. I have
2004-04-19 by Adam Seychell
... I cannot remember the exact numbers but I think 1.2 to 1.3 was the range. The problem is your test cell may need to be relatively large 500ml in order to
2004-04-19 by Stefan Trethan
... Thanks a lot, that gave some numbers. I will see if i can find carbon electrodes. I was very afraid using them seeing the carbon brush from the motor