Re: WTB: PID temperature controller
2011-03-12 by Les
Hi David, There are quite a few PID temperature controllers on Ebay at good prices as long as you do not mind ordering from China / Hong Kong. Search using
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Re: [Homebrew_PCBs] WTB: PID temperature controller
2011-03-12 by Kerry Wentworth
I have some Omega CN9121 controllers. Kerry ... -- Internal Virus Database is out-of-date. Checked by AVG Anti-Virus. Version: 7.0.289 / Virus Database:
WTB: PID temperature controller
2011-03-12 by David C. Partridge
Does anyone have one or more of these they are happy to part with for very little. 240V supply required, SSR output preferred. As postage may be an issue, I
Re: [Homebrew_PCBs] One way to precision align 2-sided patterns
2011-03-11 by DJ Delorie
... A light box helps with that, too. I suspect if you passed the taped edge through the laminator first, it would automatically center the fold on the pcb,
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-11 by Erik Knise
... Thin boards I always cut with tin snips. At my last job we had a 48 sheet metal sheer so I used to use that sometimes. I m pretty sure there is one of
Re: Vinegar, Salt, Peroxide Etching
2011-03-11 by RJ
Thanks Matt .. nice .. Even though that document appears to be in spanish? There are some nice proto board patterns at the end of it.. ... Randy
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-11 by Harvey White
... Metal shear. Use a carbide rasp as a mill to do odd corners. Works for me. Harvey
Re: Vinegar, Salt, Peroxide Etching
2011-03-11 by Matt Casey
Hi. I m Catmacey (Matt Casey) the author of the site mentioned in bebx2000 s post. The chemicals I used to etch boards are the standard off-the-shelf choice
Re: Vinegar, Salt, Peroxide Etching
2011-03-11 by bebx2000
That site put me on the trail of sodium perborate. It is unclear how he is using it. If you want hydrogen peroxide then you need to dissolve it in water. The
Re: Toner cure
2011-03-11 by RJ
Sorry Steve .. I was nervous about it being an old topic by a new rogue . :( All I was going to share was that it seems like .. The curing of the toner makes
Re: [Homebrew_PCBs] One way to precision align 2-sided patterns
2011-03-11 by Piers Goodhew
I recall DJ Delorie makes a pocket out of the 2 sides of artwork, aligned by holding the sides up to a strong light, securing them together, and then inserts
Re: Pb-free reflow scorches PCBs with no soldermask
2011-03-11 by jmelson2
... Well, I ve been doing production boards in both lead-solder and lead-free for 4 years now with this setup, and it works quite reliably. It is a bit more
Re: Vinegar, Salt, Peroxide Etching
2011-03-11 by javaguy11111
Interesting. From this site http://catmacey.wordpress.com/projects/making-pcbs-with-simple-tools/etching-the-board/ it looks like sodium perborate tetrahydrate
Re: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-11 by mlerman@ix.netcom.com
We ve hijacked this thread - sorry. This will be my last posting without changing the subject. I m working on it, and I think I might have a workable solution,
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-10 by Ryan Bray
The absolute BEST method: Tablesaw + NonFerous Metal & Plastic tablesawblade. Perfect cuts every single time without any issues. ... [Non-text portions of this
Re: Vinegar, Salt, Peroxide Etching
2011-03-10 by bebx2000
Sage, Although it isn t one of your run-of-the-mill household products, try sodium perborate tetrahydrate. It (or one of the variants) is one of the
Re: Cutting circuit boards . . . again
2011-03-10 by gmanca101
I too had that issue of cutting boards, using utility knifes to score, then moving on to hacksaw use, and I finally used a Dremel extension wand secured into a
Re: Laser Photoplotter
2011-03-10 by gmanca101
I see, yes DLP would have more potential, I also tried Epson ink blends but issues with the printheads made me abandon it. And when you look at all of the
Re: Pb-free reflow scorches PCBs with no soldermask
2011-03-10 by kc1p
... Hey, I think you re on to something here! I m running out of loaded boards to test on but the one I tried your way came out great -- thanks!!! I also
Re: Toner PCB for Beginner?
2011-03-10 by RJ
Where you from John ? Related to Crystal Ferrell?
Re: [Homebrew_PCBs] Re: Kodak PRD film ? PROBLEM SOLVED !
2011-03-10 by lists
In article , ... Ok, just curious. -- Stuart Winsor Midland RISC OS show - Sat July 9th 2011
Re: Toner PCB for Beginner?
2011-03-10 by John
Thanks for the help! I think I have enough equipment & supplies to get started. Now is the time for the Lab part of the learning exercise. When I get some
Re: [Homebrew_PCBs] One way to precision align 2-sided patterns
2011-03-10 by Charles Patton
... I can get within a few milliinches with the following process. 1) Laser print one side (preferably the component side) on clear plastic (presentation foils
Re: Laser Photoplotter
2011-03-10 by jmelson2
... I m not sure what you mean by inconsistent . I have done some tests on various laser printers where I printed a 1 grid of lines. I then turn one film
Re: Kodak PRD film ? PROBLEM SOLVED !
2011-03-10 by jmelson2
... Don t really know. It wasn t very obviously slower, though. About one minute in the fixer at a 1:4 dilution, and all the white was gone. I left it in for
Re: Laser Photoplotter
2011-03-10 by jmelson2
... Direct laser? I have never done anything with direct laser, if that means exposing resist directly on the board with a laser. This photoplotter has been
Re: Pb-free reflow scorches PCBs with no soldermask
2011-03-10 by jmelson2
... I tried to do this, and found that controlling temperature with a thermocouple in air severely overheated the boards. It has nothing to do with
Re: Vinegar, Salt, Peroxide Etching
2011-03-10 by Dave Sage
Just had a thought. For you guys experimenting with all kinds of household chemicals, I m wondering if the peroxide could be substituted for one of the
UK equivalent of HP Q2546A Laser Presentation Glossy ???
2011-03-10 by David C. Partridge
I m trying to find the UK equivalent of this - they sell one called HP A4 Laser Soft Glossy Presentation Paper with p/n Q6542A (same numbers, different
Re: [Homebrew_PCBs] Re: Laser Photoplotter
2011-03-10 by Mark Lerman
The problem with DLP is that larger boards are very inconsistent, and even smaller ones give variable results. Right now I am working with an HP 2200 that is
Re: [Homebrew_PCBs] Re: Kodak PRD film ? PROBLEM SOLVED !
2011-03-10 by lists
In article , ... Excellent! ... Yup, most fixers in use are acid-hardening . Is it slower than the fixer you were using previously,
Re: Toner PCB for Beginner?
2011-03-10 by John
Thanks for the help! I think I have enough equipment & supplies to get started. Now is the time for the Lab part of the learning exercise. When I get some
Re: [Homebrew_PCBs] Re: Where to purchase green solder mask from
2011-03-10 by Zoran A. Scepanovic
... Hash: SHA1 ... Ask one of the manufacturers: http://www.peters.de - -- Srda?an pozdrav, Zoran A. ??epanovi? zastos@gmail.com http://zastos.com +381 63
Re: Laser Photoplotter
2011-03-10 by gmanca101
Sorry, I chose this post as the most recent of yours to reply to; I used to dabble in trying various methods of DIY PCB s and I did try the plotter method with
Re: Where to purchase green solder mask from
2011-03-10 by jan.vorlicek
I have bought it some time ago on ebay for about $12 for 10ml tube (with free international delivery). It is a photosensitive liquid that you spread over the
Re: Pb-free reflow scorches PCBs with no soldermask
2011-03-10 by kc1p
... It was worth a shot, but no, it weathered the 5 minutes at 175 just fine but then got cooked when it ramped up to 230 C. Thanks, though! John Wilson D Bit
Re: [Homebrew_PCBs] Toner PCB for Beginner?
2011-03-10 by Slavko Kocjancic
... Brother HL series is bad... It s has good print and accuracy but the toner doesn t transfer. The HP is better in that way.
Re: Kodak PRD film ? PROBLEM SOLVED !
2011-03-10 by jmelson2
... Well, the problem is SOLVED! After MUCH calling around, I found the local graphic arts distributor, Xpedex, had a developer and fixer that they
Re: Laser Photoplotter
2011-03-10 by jmelson2
... I started building this thing in 1986, without any idea how to actually produce a beam that could be turned on and off. In 1996 I got it running with a
Re: Toner PCB for Beginner?
2011-03-10 by RJ
Well .. I had given that some thought as well .. and there is a few printers mentioned in the archives if you want to search and see .. But .. another thing
Re: Vinegar, Salt, Peroxide Etching
2011-03-10 by RJ
hmmm I didnt know that about the cat .. but I LIKE IT !! The thing that makes me a inquisitive, curious PITA, is I guess my personality has a blend of
Re: [Homebrew_PCBs] Re: Hydrogen peroxide mixing
2011-03-10 by Erik Knise
... (I have been writing this all day a little bit at a time while I was at work.) Okay, first a gripe about this thread. Completely agree with Ben in that I
Re: Cutting circuit boards . . . again
2011-03-10 by Ben L
... Some use Wet Tile saw to keep the dust down. I have used table saw but dust is a problem. You need to setup some good dust collection and Yes put a
Re: Hydrogen peroxide mixing
2011-03-10 by Ben L
... As for want to use. Hydrochloric Acid sold as Pool and Concrete Cleaner and Drug Store 3% Hydrogen Peroxide. I believe that the Mix is 1 part Hydrochloric
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-10 by Steve
I have also noticed the blade flexibility and have likewise found that going slow allows me to control it pretty well. Do you use water in the base of the saw
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-10 by Robert Blumer
Hi I use the diamond blade on the tile saw and use it wet. Which keep the dust down a lot. Have cut quite a lot of Fiberglass pcb and the blade keep working.
Re: Cutting circuit boards . . . again
2011-03-10 by bebx2000
Steve, Probably a lot; after all, they are rock saw blades. I find the Lopacki blade to be a bit flexible for a straight cut unless I go slow. When cutting
Re: [Homebrew_PCBs] Re: Vinegar, Salt, Peroxide Etching
2011-03-10 by Piers Goodhew
Kinda sounded to me like you get that CuCl precipitate that you need to remove manually, either by agitating a lot or by scraping it off (like the FeCl wipe
Re: [Homebrew_PCBs] Re: Cutting circuit boards . . . again
2011-03-10 by Steve
Baxter, Thanks for the info and link to the review. Looks like at least one guy is not very satisfied with his Proxxon table saw. I ve had pretty good success
Re: Toner PCB for Beginner?
2011-03-09 by leeleduc
Found a good set of videos at http://www.getlofi.com/?p=1997. Shows the steps of the toner transfer process.