Re: [Homebrew_PCBs] Acids that eat Paper
2004-10-12 by Adam Seychell
... I ve spilled 98% sulfuric on paper, and it turns charcoal black in seconds. I assume your after something a little easier to handle. Normal 20% sulfuric
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Re: [Homebrew_PCBs] Acids that eat Paper
2004-10-12 by Thomas
thanks Roger my hairdresser wife will understand .... wont she ?? 12% will be slower than 35% ... Thomas ... From: Roger, in Bangkok To:
RE: [Homebrew_PCBs] Acids that eat Paper
2004-10-12 by Roger, in Bangkok
Not and acid, but ... hydrogen peroxide breaks down paper rather nicely. I expect 35% peroxide that is used in food processing and agriculture would do nicely.
Re: Help me find eyelets
2004-10-11 by fkang
Are these eyelets at Mouser too big for what people are looking for? If nothing else, they sure are cheap. Stock: 534-22 1/16 Tin plated brass ID: .045 OD:
Re: Help me find eyelets
2004-10-11 by dave_needle
Thanks, the supplier is actually International Eyelets. The price is 14 cents each in 100 qty. I have asked them for a volume price at 20,000 pcs, I will need
Re: Help me find eyelets
2004-10-11 by dave_needle
Yep, thats them. The price is 14 cents each in 100 qty. I have asked them for a volume price at 20,000 pcs, I will need 2000 for me, and I can resell them to
Re: Help me find eyelets
2004-10-11 by dave_needle
International eyelets is the supplier. The price is 14 cents each in 100 qty. I have asked them for a volume price at 20,000 pcs, I will need 2000 for me, and
Re: Help me find eyelets
2004-10-11 by dave_needle
Yep, thats them. The price is 14 cents each in 100 qty. I have asked them for a volume price at 20,000 pcs, I will need 2000 for me, and I can resell them to
Re: Acids that eat Paper
2004-10-11 by Phil
... works like the successes that I ve read about for the TT method, But I did find a paper that gave reasonable results ... if I could eat or break down the
Re: [Homebrew_PCBs] Re: Acids that eat Paper
2004-10-11 by Thomas
I am having a hard time finding suitable paper here in Jakarta that works like the successes that I ve read about for the TT method, But I did find a paper
Re: [Homebrew_PCBs] Re: Help me find eyelets
2004-10-11 by Thomas
I picked up some eyelets from a shop in Singapore Called Hamilton Electronics, kinda out of the way for most of you anyway I got a 100++ or maybe 200 for like
Re: Acids that eat Paper
2004-10-11 by Phil
... sodium hydroxide, lye, will break down the lignen (iirc) in paper. Of course that s the opposite of an acid so it doesn t meet the strict definition of
Acids that eat Paper
2004-10-11 by Thomas
Hi any suggestions for an Acid that will eat paper and not the Copper Thomas :) [Non-text portions of this message have been removed]
Re: Toner transfer and bubble etching
2004-10-11 by Phil
I d use the iron for about 3 minutes - 1 min is probably too short. It looks to me like you didn t get hot enough everywhere - make sure you move it around as
Re: programmers pay attention
2004-10-10 by Phil
... OK. It is unfortunate that people skimp on bypass caps but that seems independent to routing. I suspect an autorouted board can have just as many
Re: programmers pay attention
2004-10-10 by Phil
... yup, my bad. Build you own... is the correct title. My doctor said something about alzheimers but I forget...
Re: programmers pay attention
2004-10-10 by crankorgan
Phil, What I ment was he may work on circuits that don t require a certain type component layout. I have trouble shot micro circuits where traces ran all over
Re: programmers pay attention
2004-10-10 by Steve
... I love the menu! Very clever. So you meant Build Your Own Printed Circuit Board by Al Williams, not Making Printed Circuit Boards by Jan Axelson. Dang!
Toner transfer and bubble etching
2004-10-10 by Philip Pemberton
Hi, First of all, I m new to this group, so please go easy on me. I ve been etching PCBs for a good five years, and have just exhausted my first batch of
Re: programmers pay attention
2004-10-10 by Phil
... So, one should NOT discuss manual routing at all in a book on PCB design? That doesn t make sense to me. Especially when the Eagle autorouter will stall
Re: programmers pay attention
2004-10-10 by Dave Mucha
... is ... none ... If you read the book, then send him a note of what you want for the second edition. He s a pretty nice guy and always likes to hear from
Re: programmers pay attention
2004-10-10 by crankorgan
Phil, There are tons of circuits out there where the component and trace layout is not important. Chopper controllers and audio amps are a different story.
Re: programmers pay attention
2004-10-10 by Phil
By the way, I was at a big box bookstore today and saw a book by Al Williams Making Printed Circuit Boards . Half the book is an Eagle tutorial. From my 5
Re: [Homebrew_PCBs] Re: Help me find eyelets
2004-10-10 by JanRwl@AOL.COM
In a message dated 10/9/2004 11:36:48 PM Central Standard Time, a.j.franzman@verizon.net writes: Sheets of eyelets??? Are you sure you know what they re
Re: [Homebrew_PCBs] Re: Help me find eyelets
2004-10-10 by JanRwl@AOL.COM
In a message dated 10/9/2004 9:41:18 AM Central Standard Time, dave_mucha@yahoo.com writes: since there is at least one other person who wants them, maybe a
Re: Help me find eyelets
2004-10-10 by Alan J. Franzman
... Sheets of eyelets??? Are you sure you know what they re talking about? A.J.
Re: [Homebrew_PCBs] Re: Help me find eyelets
2004-10-10 by Larry Taylor
I ll buy half (250) and split the cost with you. Larry Taylor KF6JBG ... From: grantfair2001 To: Homebrew_PCBs@yahoogroups.com Sent: Saturday, October 09,
Re: Help me find eyelets
2004-10-10 by grantfair2001
Apparently Mouser sells them for $26 for 500. You can get one type for 10 cents per from Far Circuits: EYLETS .055 OD .042 ID FOR DOUBLE SIDED BOARD THRU
Re: [Homebrew_PCBs] Re: Help me find eyelets
2004-10-10 by t Murphy
you know i have a bunch of sheets of them from some pcb work i did a long time ago. If your interested....i can let you have them ...
Re: programmers pay attention
2004-10-09 by crankorgan
Hans explains it to me starting at message 902 Just enter 902 in the message box.
Re: programmers pay attention
2004-10-09 by Phil
yeah, obscure is Eagle s middle name - press the ratsnest button (obvious, huh?). You do have to make an actual connection to the polygon for it to work. I
Re: [Homebrew_PCBs] programmers pay attention
2004-10-09 by Cristian
Remember my Round to Square. ... Not, for sure. Cristian ... Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com).
Re: programmers pay attention
2004-10-09 by daveismissing
Thanks John I am aware of the fill but as I am an eagle rookie i have not found the way to display fill on the screen. I tend to do a lot of rectangles -
Re: [Homebrew_PCBs] Help me find eyelets
2004-10-09 by Henry Carl Ott
Maybe these guys? http://www.intl-eyelets.com/
Re: Help me find eyelets
2004-10-09 by Dave Mucha
... Hi Dave, Who is the supplier ? since there is at least one other person who wants them, maybe a higher quantity order will get a lower price ? Dave
Re: Help me find eyelets
2004-10-09 by ballendo
Hello, Not a direct answer, but htese guys DO have tin lined copper tubing, (but too big a diameter as std.... But they DO sell hypodermic tubing as well, so
Re: [Homebrew_PCBs] Help me find eyelets
2004-10-09 by JanRwl@AOL.COM
In a message dated 10/8/2004 11:09:31 PM Central Standard Time, dave@davenmargo.com writes: Does someone know where to get the copper eyelets, or does someone
Help me find eyelets
2004-10-09 by dave_needle
I make many PCBs at home, using copper eyelets at the method for thru-holes. I used to buy them from Pulsar (formerly DynaArt), but they no longer sell them.
PCB Oktoberfest - San Jose
2004-10-08 by Joanna
PCB Oktoberfest - San Jose Okto – ber – fest October – beer – fest Have you ever attended an Octoberfest with a PCB twist? - What is it? Well, it s a
Re: UV laser exposure
2004-10-08 by Steve
I m looking forward to it! But please, post it in Files, not Photos. The Photos section only allows everyone to see a 300x400 max size, only the moderators and
Re: programmers pay attention
2004-10-08 by Phil
yup yup yup, eagle makes it pretty easy - I do it all the time. I just create a polygon that surrounds my entire board, name it gnd (or what ever you use for
Re: programmers pay attention
2004-10-08 by crankorgan
With the Eagle program you can FILL the ground plane around the traces. Hans told us how many messages back. I used this method on my Piker board. All ground
Re: [Homebrew_PCBs] programmers pay attention
2004-10-08 by Earl T. Hackett, Jr.
PCB layout programs are really intended for professional use. When designing a really high speed board, the big concerns are cross talk, parasitic capacitance
programmers pay attention
2004-10-08 by daveismissing
Why isn t all this software done the other way round? I really just want to define how much space I want between traces. I want all the rest to be trace. Less
Re: [Homebrew_PCBs] Epson DURABrite Inks
2004-10-08 by Stefan Trethan
... Well, IMO there are the following requirements for a direct-print ink: a) etch resistant - means not water soluble and not attacked by the etchant. b) 100%
Epson DURABrite Inks
2004-10-08 by Thomas
Hi btw has anyone tried this ink on a PCB ?? http://www.epson.com/cgi-bin/Store/DuraBrite/DuraBriteMain.jsp DURABrite® Ink is a revolutionary pigment-based
Re: [Homebrew_PCBs] Re: UV laser exposure
2004-10-07 by Adam Seychell
... Well, to be pedantic we should be strictly following scientific notation, with SI units and use standard errors were applicable :) Your 4 seconds sounds
Re: UV laser exposure
2004-10-07 by Cristian
... What it really meant? ************************************************** Thanks for confirming my calculations. I ll try to buy the CrystaLaser, if they ll
Re: UV laser exposure
2004-10-07 by RMustakos
Christian & Adam, Where I m having an issue understanding is where the time comes from. It looks like the 100mJ/cm^2 is really 100 mW*Seconds/cm^2 as 1 Joule =
Re: [Homebrew_PCBs] Re: Questions about toner transfer method.
2004-10-07 by Alvin Rose
Hi Mike What is the best proven laminator to use for good circuit boards and what staples paper is used. A.R