Re: [Homebrew_PCBs] soldering surface mount without solder resist.
2013-02-14 by Mark Lerman
I do it all the time. There are many tutorials out there, but I usually use solder paste hand delivered. Any excess can be removed with solder wick after
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soldering surface mount without solder resist.
2013-02-14 by scubadogct
hello Well my pcb first pcb etching has worked a treat. i now have a board ready to poulate. i have designed a board that has surface mount components. I have
RE: [Homebrew_PCBs] Re: ferric chloride question
2013-02-14 by Todd F. Carney
Rick, Other than looking a little cruddy, what is the problem with the precipitate that settles on the bottom? If you re worried it might be ferric chloride
RE: [Homebrew_PCBs] Re: ferric chloride question
2013-02-14 by Rick Sparber
First I added some Muriatic Acid and did see much of the precipitate dissolve. Next, I put a small tuft of steel wool in the ferric chloride. After 20 minutes
Re: [Homebrew_PCBs] Re: relatively good prices
2013-02-14 by Donald H Locker
Sodium metasilicate pentahydrate is also known as waterglass and sodium silicate. That stuff is available at many pharmacies and some farm supply stores.
Re: relatively good prices
2013-02-14 by Mitch Davis
Three people have asked me where I got Sodium Metasilicate Pentahydrate: ... I believe it s what you get when you buy Kinsten DP-50 developer. Here s an
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-14 by Rick Sparber
Chester, Lots of good suggestions. I am looking for a small change to my existing drill press to make it better rather than building a new one. You can see it
Re: [Homebrew_PCBs] relatively good prices
2013-02-14 by Mitch Davis
... I believe my home-use developer is Sodium Metasilicate Pentahydrate. Mitch.
RE: [Homebrew_PCBs] relatively good prices
2013-02-14 by Rick Sparber
Leon, I have some marked June 2011. I ll have to test it to see if it is ok. I did not see a use by date on any of my packages. Thanks, Rick ... From:
Re: [Homebrew_PCBs] relatively good prices
2013-02-14 by Leon Heller
... The NaOH developer I use (2 tsps per litre) lasts indefinitely. Leon -- Leon Heller G1HSM
RE: [Homebrew_PCBs] relatively good prices
2013-02-14 by Rick Sparber
Mitch, Where do you have your boards made for that price? Rick ... From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of
Re: [Homebrew_PCBs] relatively good prices
2013-02-14 by Mitch Davis
... When making PCBs at home, I use Kinsten pre-sensitised board. I haven t had a problem with photoresist going off, because I seal the bag tight after I ve
Re: [Homebrew_PCBs] relatively good prices
2013-02-14 by Leon Heller
... Photo-resist goes off after a few months, which could cause a problem with old stock. Leon -- Leon Heller G1HSM
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-14 by Howard Chester
... From: Rick Sparber Subject: RE: [Homebrew_PCBs] Re: circuit board drilling question To: Homebrew_PCBs@yahoogroups.com Date: Wednesday,
relatively good prices
2013-02-14 by Rick Sparber
I can drive past Circuit Specialists in Mesa, Arizona, almost every week. They sell chemicals and photosensitive boards. I doubt they have the lowest prices
Re: [Homebrew_PCBs] what size should I build uv exposure box?
2013-02-14 by DJ Delorie
Mine is big enough to hold a 8x10 PCB but so far I haven t done anything bigger than 4x6 or so. Bigger than that, and it s harder to fit in my etch tank.
Re: what size should I build uv exposure box?
2013-02-13 by Leon
... This is mine: http://www.leonheller.com/Photos/UV%20unit.jpg Leon
Re: [Homebrew_PCBs] Re: ferric chloride question
2013-02-13 by toddroberts2001@...
In a message dated 2/13/2013 1:54:36 A.M. Eastern Standard Time, scubadogct@gmail.com writes: Does the addition of Hydrochloric acid help to maintain its
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-13 by Rick Sparber
Harvey, The problem I have with my present arrangement is parallax. I have the end of my drill about 0.01 above the board and I am able to sight down at about
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-13 by Rick Sparber
Bertho, Although I think the arrangement you have described is superior to what I have, it would be difficult to make the change. I was looking for a simple
RE: [Homebrew_PCBs] what size should I build uv exposure box?
2013-02-13 by Rick Sparber
I m a minimalist. My exposure box is just two 2 long UV bulbs in their fixtures ($10 each at Walmart) tied together with a pair of bars on top. The bulbs
Re: [Homebrew_PCBs] Re: ferric chloride question
2013-02-13 by Charlie Taylor
Thank you very much. Very informative. Exactly what i was looking for. Regards Charlie ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] what size should I build uv exposure box?
2013-02-13 by lists
In article , ... The biggest board I ever made was for an eight channel lighting controller
Re: [Homebrew_PCBs] what size should I build uv exposure box?
2013-02-13 by Todd F. Carney
Charlie, I used to use a box with a glass surface about 12x12 inches. That was for prototype work at an aerospace-research lab. I don t think I ever made a
what size should I build uv exposure box?
2013-02-13 by Charlie Taylor
I am building a uv exposure box. I initially need it for a project that will fit on a 100mmx160mm pcb. I will obviously design it large enough to deal with
Re: ferric chloride question
2013-02-13 by scubadogct
Does the addition of Hydrochloric acid help to maintain its working strength also?
Re: ferric chloride question
2013-02-13 by scubadogct
Does the addition of Hydrochloric acid help to maintain its working strength also?
Re: [Homebrew_PCBs] ferric chloride question
2013-02-13 by Rick Sparber
I started out with the light overhead but having it under the tub works better for me. Only when the copper is gone does the light come through. The bulb also
Re: [Homebrew_PCBs] ferric chloride question
2013-02-13 by toddroberts2001@...
In a message dated 2/12/2013 7:05:30 P.M. Eastern Standard Time, rgsparber@aol.com writes: The reason that having the ferric chloride dark is an issue for me
RE: [Homebrew_PCBs] ferric chloride question
2013-02-13 by Rick Sparber
The reason that having the ferric chloride dark is an issue for me is that I use a translucent tub that sits over a 200W incandescent bulb. I am able to slowly
RE: [Homebrew_PCBs] ferric chloride question
2013-02-12 by Rick Sparber
Todd, Makes sense. Thanks, Rick ... From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Todd F. Carney Sent: Tuesday,
RE: [Homebrew_PCBs] ferric chloride question
2013-02-12 by Rick Sparber
I was thinking that the copper was the precipitate I was seeing. Rick ... From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf
Re: [Homebrew_PCBs] ferric chloride question
2013-02-12 by DJ Delorie
... What do you think happens to all that copper you etch off? It s still in there somewhere...
Re: [Homebrew_PCBs] ferric chloride question
2013-02-12 by Todd F. Carney
Rick, The ferric chloride is dissolving copper into solution. For that reason, I could not get lighter or stay the same. Put something that s not white into
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-12 by Boman33
The old commercial units had the drill come up from the bottom and an optical sight from the top. Bertho [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-12 by Harvey White
... How about: 1) a BB gun or pellet gun (project dot at infinity) type of sight. 2) an angled mirror that lets the sight be horizontal rather than vertical.
Re: [Homebrew_PCBs] ferric chloride question
2013-02-12 by toddroberts2001@...
Thanks for the postings as I try to keep up with the list. I tried Leon s suggestion recently and sure enough, adding a little Hydrochloric acid to some used
RE: [Homebrew_PCBs] ferric chloride question
2013-02-12 by Rick Sparber
Leon, I ll try that today. Any idea why the ferric chloride is getting darker? Rick ... From: Homebrew_PCBs@yahoogroups.com
Re: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-12 by Rick Sparber
Dennis, I have not tried the plastic yet but suspect you are right. It might also trap shavings. But I am shooting for a simple solution and lasers may be
Re: circuit board drilling question
2013-02-11 by dennis.lewis5
I would think the plastic might be distracting since it would be like looking into a mirror. Maybe two line lasers set up to provide a crosshair target?
Re: [Homebrew_PCBs] ferric chloride question
2013-02-11 by Leon Heller
... A little hydrochloric acid should remove the sludge. Leon -- Leon Heller G1HSM
ferric chloride question
2013-02-11 by Rick Sparber
I have been using the same ferric chloride for a while and it still does a fine job of etching my boards. But it has become darker and I see some precipitates
RE: [Homebrew_PCBs] Re: circuit board drilling question
2013-02-11 by Rick Sparber
Dennis, I can do OK with just top light and about 0.01 of clearance between board and drill during positioning. But it would take less concentration if I
Copper Connection PCB layout software
2013-02-10 by robotroom
Hello everyone, I m David Cook from Robot Room. Like all of you, I ve enjoyed etching and drilling boards at home for many years. You can see some of my work
Re: circuit board drilling question
2013-02-09 by dennis.lewis5
Rick, Recently I did this. I cannot tell you that it was a terrific improvement. In my arrangement there are overhead lamps as well as the one below the deck.
Re: Gutenprint configuration for print density, drop size etc for Epson printers?
2013-02-08 by AlienRelics
Ah! My mistake, then. I m anxious to get some talk going there, so my enthusiasm got the best of me. Steve Greenfield AE7HD
Re: [Homebrew_PCBs] Gutenprint configuration for print density, drop size etc for Epson printers?
2013-02-07 by DJ Delorie
If it s compatible with the R280, I have some software that prints direct (i.e. bypasses gutenprint) in order to 100% control drop size.
Re: Gutenprint configuration for print density, drop size etc for Epson printers?
2013-02-07 by gulick_steve
Hi Ok, sorry I thought that group was specifically for experiments for modifying inkjet printers for direct printing to PCBs. I will now join that group as
Re: Gutenprint configuration for print density, drop size etc for Epson printers?
2013-02-07 by AlienRelics
Please post questions (and answers! Especially answers!) to the Inkjet PCB Construction group. http://groups.yahoo.com/group/Inkjet_PCB_Construction/ Steve
Gutenprint configuration for print density, drop size etc for Epson printers?
2013-02-06 by gulick_steve
Hi I would like to increase the amount of ink applied by my Epson c88. I am using linux with gutenprint. I don t know know how to configure the parameters. Any