[Homebrew_PCBs] plumbing paste not for SMD reflow
2005-11-22 by Stefan Trethan
I tried the paste for SMD out of curiosity, and found it is no good. It will melt before reflow (the flux i think). The paste will flow all over the place,
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Re: [Homebrew_PCBs] Re: Tinning the board?
2005-11-22 by Stefan Trethan
... The current electroless solutions aren t that much better, containing thiurea which is a known carcinogenic substance. ST
Re: Tinning the board?
2005-11-22 by Dave
... Years ago, I used to use an electroless Tin plating solution based on Stannous Chloride, Sodium Hydroxide, and Sodium Cyanide. It produced a beautiful
Re: Dry Film Photoresist (small quantity)?
2005-11-22 by superone0319
... ... cpblake2, Thanks for the infor.
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-22 by Stefan Trethan
On Tue, 22 Nov 2005 04:57:40 +0100, pinoy_nyc@yahoo.com ... That s a cool way of making a copper pour, not every PCB software can do it and it might be a
Re: [Homebrew_PCBs] Re: laser printer transparency film any good?
2005-11-22 by Stefan Trethan
... Yes, but what i don t get is how you add something. How do you manage to get the traces you need to the right signals, and how do you manage to contact
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-22 by pinoy_nyc@yahoo.com
WOOT!... the 3 images didn t attached succesfully... I ve uploaded the 3 images, pls see Photo Section - ISOLATED ETCHING - TIPS & TRICKS - PHOTO SECTION LINK
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-22 by pinoy_nyc@yahoo.com
Here s the procedure using Photoshop 1.) Load the board image 2.) select magic wand - make sure anti-alias & contigous is disabled. 3.) click/select the black
Re: laser printer transparency film any good?
2005-11-22 by mikezcnc
I was also curious how that would go. OK, I made a circuit, the PCB is all milled and drilled, I populated the PCB and it all works but not to well. Turns out
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-22 by Mike Young
http://www.stencilsunlimited.com/TDS%20SynTECH.pdf http://www.stencilsunlimited.com/TDS%20NWS-4200-LF.pdf The first is a datasheet for tin/lead paste; the
Re: [Homebrew_PCBs] Re: laser printer transparency film any good?
2005-11-21 by Stefan Trethan
... Would that work? i mean where do you join the new traces to? I ve trouble enough drilling additional holes in a populated board, you are certainly a brave
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Stefan Trethan
I ll do that, but i m positive the following will be the result: There will be one temperature where the shiny thin layer with grey loose powder on top will
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin so...
2005-11-21 by lists
In article , ... More expensive I expect because it won t be made in such large quantities and the extra precautions
Re: [Homebrew_PCBs] New cheap UK etchant tank... thoughts...
2005-11-21 by lists
In article , ... Certainly looks interesting if I didn t have something else ATM I have several 280VA mains
Re: Homebrew hot air system
2005-11-21 by Steve
To preserve long links, it sometimes works to enclose them in as I did below. Or use TinyURL: http://tinyurl.com/8str9 BTW, that link and another are in the
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Alan King
... Maybe simpler than what I was thinking anyway. When wiping, you are taking off the flux and oxides, when it just starts to reflow you are leaving them on.
Re: laser printer transparency film any good?
2005-11-21 by jzmuda2000
Not to hijack this thread (which has wandered away from the original post...and onto RTV silicon impregnated papers and direct-to-copper printing)...but to
Re: Homebrew hot air system
2005-11-21 by jzmuda2000
Try: http://usbmicro.com/odn/documents/ACC430664DD26DDE5986574AAA62775FDFF 29EA1.html It s an article about converting a Radio Shack De-soldering iron to a
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-21 by Mike Young
Excellent! Post process the image. :) I ll give the magic wand a swing or two this evening, too. 8 pixels is probably just right for 600 dpi, a touch more than
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Stefan Trethan
Nah, doesn t fit. If i heat with hot air from above the powdery stuff must be hotter than the board. ST
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Mike Young
Yes, sufficiently high temperature and dwell time are necessary. Lacking a controlled process, the simplest thing to do is cook and then overcook a few junk
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Alan King
... Think of having your board right at the melt point, and taking a solid lead pencil and writing on the traces. Pencil stays solid, but where you re
Re: [Homebrew_PCBs] Re: Tinning the board? - reflow
2005-11-21 by Stefan Trethan
Anyway, i bought the more expensive silver paste because it must surely be better ;-) BUT, it seems to reflow in the same strange manner as the leaded paste.
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by Stefan Trethan
... I do agree. I don t mind it at all if sb. outbids me. What i HATE is if i either forgot an auction, or the software messed up, or.. and have to see it did
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-21 by pinoy_nyc@yahoo.com
Hi Mike, Oh I see, it s isolation etching. Thanks. I just tried experimenting with photoshop and able to produce it Isolation etching in about 30 seconds from
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin so...
2005-11-21 by ron amundson
... When SAC solder is already shown to have problems with tin pest, chances are SA has a probability of having problems, and SC would be worse. The 1%Pb as
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin so...
2005-11-21 by Stefan Trethan
Well, lead fishing weights are/will be banned quickly too. (The fishing junk often gets lost/discarded and kills water birds and other animals, and it is not
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin so...
2005-11-21 by Alan King
... The article I hit last week on it mentioning the military s unpreparedness for no-lead future said that the only thing that reliably stops tincicles is at
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by Alan King
... All of the above and then some. With hundreds of transactions, only a few went bad, vast majority without the slightest problem. Even if $1 out of $10
Re: [Homebrew_PCBs] Re: CustomPCB and PCBEx
2005-11-21 by Alan King
... Why pay $40 extra, for them to spread things around like they want for them not me to save money, when I don t want it? To subsidize someone else s board
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by Stefan Trethan
Here s a reminder why you maybe should: A) prices are _low_ (one tenth and lower). B) huge selection of products. C) bad sellers can easily be avoided with
Re: Dry Film Photoresist (small quantity)?
2005-11-21 by cpblake2
... Micro-Mark sells two 12 x19 pieces, item #83130, for $8.95. Their website is http://www.micromark.com
Re: [Homebrew_PCBs] Mechanically Etch Style
2005-11-21 by Mike Young
... From: To: Sent: Sunday, November 20, 2005 11:46 PM Subject: [Homebrew_PCBs] Mechanically Etch Style
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin so...
2005-11-21 by JanRwl@AOL.COM
Tinpest is NOT a problem with tin solders with other metals ALLOYED in with the tin, even when only 1% or so! Only pure tin can get tinpest below
Re: [Homebrew_PCBs] Tinning the board?
2005-11-21 by Mike Young
... From: ... Reading Think and Tinker s gives one the notion they can do this (almost) easily at home. Plating is deposited by electroplating
Re: [Homebrew_PCBs] Re: Tinning the board? silver/tin solder or copper/tin solder?
2005-11-21 by David Griffith
... Tin whiskers also concern me, especially as more of us delve into surface-mount components for our homebrews. -- David Griffith dgriffi@cs.csubak.edu
Mechanically Etch Style
2005-11-21 by pinoy_nyc@yahoo.com
Hello to All, How can I create a mechanically etch style PCB? Can I do this using eagle? I m still going to use Ferric Chloride to etch it, but I want the
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by JanRwl@AOL.COM
In a message dated 11/20/2005 7:23:08 P.M. Central Standard Time, mikewhy@sbcglobal.net writes: Which of the following is a reason to not use eBay? F ! ! !
Re: Tinning the board?
2005-11-21 by ballendo
Tinnit. Works fine, is simple, and cheap. About 4 bucks. Hope this helps, Ballendo P.S. Circuit Specialists sells it; among many others.
Re: CustomPCB and PCBEx
2005-11-21 by ballendo
... ... ... Isn t this exactly what they say on their website??? (I may be thinking of another company; but there was definitly one which was
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by JanRwl@AOL.COM
In a message dated 11/20/2005 12:53:13 P.M. Central Standard Time, jim@jtmiller.com writes: Where do folks get their stock?
Re: [Homebrew_PCBs] Tinning the board?
2005-11-21 by JanRwl@AOL.COM
In a message dated 11/20/2005 12:21:12 P.M. Central Standard Time, jim@jtmiller.com writes: How do folks here tin their boards after they re etched?
Re: laser printer transparency film any good?
2005-11-21 by ballendo
ST, Sounds like a drywall knife / trowel... Ballendo ... normally ... wide one.
Re: Tinning the board? silver/tin solder or copper/tin solder?
2005-11-21 by Ron
... Apart from the melting points, one of the things that has me really concerned is tin pest. For most projects its probably not a big issue, as few will see
Re: [Homebrew_PCBs] Tinning the board? silver/tin solder or copper/tin solder?
2005-11-21 by Mike Young
... From: Stefan Trethan ... It s too late in the day for hard science, but here s the reader s digest version. Eutectic tin
Re: [Homebrew_PCBs] Tinning the board?
2005-11-21 by pebo festus
jim- read message 10103- the dealer is mcmaster.com mebo ... __________________________________ Yahoo! Mail - PC Magazine Editors Choice 2005
Re: [Homebrew_PCBs] Re: New cheap UK etchant tank... thoughts...
2005-11-21 by Kev Pearce (kevp.com)
Thanks... interesting... maybe not worth it then... Kev/. ... From: Chris Horne To: Sent: Monday, November
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by Mike Young
... From: Jim Miller To: Sent: Sunday, November 20, 2005 6:45 PM Subject: Re: [Homebrew_PCBs] Board stock?
Re: [Homebrew_PCBs] Board stock?
2005-11-21 by Jim Miller
thanks all don t know why i keep forgetting about ebay... tnx jim
Re: New cheap UK etchant tank... thoughts...
2005-11-21 by Chris Horne
Kev do a search in this group for ET20 Chris ... Maplin catalogue... ... step down converters for the UK are cheap enough, power ratings permitting...