White paper on PCB layout design
2017-07-11 by mosaicmerc@...
https://www.pads.com/multimedia/pcb-pads-dealing-with-dense-highly-constrained-designs-webinar?clp=1&contactid=1&PC=L&c=2017_07_11_bsd_pads_od_dense_designs_v1
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RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-11 by Brad
Are you using an iron or a laminator? I’m finding I get very good results with iron if I do the prep properly, but there’s always that one spot that no
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-10 by Harvey White
... The clear film transfer is something I ve not had a lot of luck with. The Pulsar paper, once you understand the limits of the process, will work. ...
Re: Vintage PCB toner transfer problems
2017-07-10 by don@...
I first used toner transfer paper purchased at Digikey over 20 years ago. Discovered the whole process to be RUBBISH... So it seams still is. Digikey
Re: Vintage PCB toner transfer problems ios-propyl wipe
2017-07-10 by AncelB
91% isopropyl and Bounty paper towels work fine for cleaning the copper after sanding it. Don t use cheap tissue that sheds. Also for double sided boards I
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems ios-propyl wipe
2017-07-10 by Harvey White
... What I use: scrub the boards with 1000 or 1200 grit wet/dry paper. Using it wet is fine. use something like bon-ami to clean the boards. rinse them. wipe
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems ios-propyl wipe
2017-07-09 by michael tenore
I have been using Toner Transfer with very good results! I scrub my boards with very fine scotch-brite pads. They are grey colored and they are available at
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems ios-propyl wipe
2017-07-09 by Rob
I had not tried alcohol. I ve been using 220 grit sandpaper per your advice...since a year ago? Then I used acetone to clean up the fingerprint oil and
Re: Vintage PCB toner transfer problems
2017-07-09 by AncelB
Genuine or non oem HP toner works for me. For the pitting problem I transfer craft metallic foil on top of the toner before etching. It s a well known practice
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-09 by Malcolm Parker-Lisberg
If your HP printer is newer than the one I have, you can use LJConfig to control the amount of toner laid down Malcolm I don t
Re: Vintage PCB toner transfer problems
2017-07-08 by kbyrne10@...
I have found that only genuine HP Laser ink works not replacement ink. Do you have software with printer to set density to 1200 times 1200 DPI?
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems IRON pressure
2017-07-08 by Rob
Check out your print image quality options. Mine defaults to NORMAL and had the option for DRAFT...which uses less toner and is lighter. Perhaps your default
RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems IRON pressure
2017-07-08 by Howard Chester
I no longer use the toner transfer method to produce my PCB s(I use UV exposure), I remember using Orange scented household cleaner as an adhesive to help
RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems IRON pressure
2017-07-08 by Brad
Will do. In the last day I have managed to pull off two perfect transfers with magazine paper and my iron. I clean the boards more heavily. When ironing, I
Re: Vintage PCB toner transfer problems IRON pressure
2017-07-08 by AncelB
Brad, Have a look at the videos in the files section of my project: https://hackaday.io/project/3363-apache-al13p-tl-320b-one-pass-pcb-toner-xfer
Re: Vintage PCB toner transfer problems IRON pressure
2017-07-07 by Rob
I could not get consistent results with a clothes iron so I resorted to steel plates: http://www.learnmorsecode.com/laminator/hotcakes.html ... I could not get
Re: Vintage PCB toner transfer problems
2017-07-07 by leeleduc@...
I use Tarn-X . It s a cleaner for copper bottom pans and silverware. You can find it in the cleaners isle of the supermarket. Another brand that works well is
RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-07 by Brad
Thanks guys. Going to take another run at it. Question for those that iron – I have read competing schools of thought.. some say you need tons of pressure,
Re: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-07 by Harvey Altstadter
Brad, A couple of thoughts: I have used Bar Keeper s Friend on some stubbornly oxidized boards. It contains some oxalic acid, so wear gloves. When a board is
RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-06 by keith printy
Lemon juice may work also have seen it used as flux for soldering pc boards From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] Sent:
RE: [Homebrew_PCBs] Vintage PCB toner transfer problems
2017-07-06 by keith printy
We used to use fine steel wool to clean the oxide off From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] Sent: Thursday, July 06, 2017
Re: Vintage PCB toner transfer problems
2017-07-06 by allan.hale@...
Hi Brad, On the severely oxidized portion of the boards you can try two items, Straight, clear ammonia NH4OH or sudsy ammonia with several applications it
RE: [Homebrew_PCBs] Re: Vintage PCB toner transfer problems
2017-07-06 by Brad
Okay I’ll get a few of those. I thought Sharpie could handle it but apparently not. I also purchased some dry-transfer PCB stuff.. has traces, pads, etc..
RE: [Homebrew_PCBs] Vintage PCB toner transfer problems
2017-07-06 by Brad
Yeah they are definitely pretty oxidized.. for example, where the sticker on the plastic packaging sat this is noticeable difference in color. And I keep
Re: [Homebrew_PCBs] Vintage PCB toner transfer problems
2017-07-06 by Keith B
I haven t been following the thread, so hopefully i m not redundant. That vintage board may be much heavier than you usually use i.e. 2+ ounce copper etc. so
Re: Vintage PCB toner transfer problems
2017-07-06 by kbyrne10@...
Staedtler Lumocolor Red works well and the FeCI does not affect it at all. Bought on E-Bay four colors 10.00 or so USD. Have only tried red so far but it works
Vintage PCB toner transfer problems
2017-07-06 by Brad
Hello, A while ago I bought some vintage PCB stock from 1973. I was really excited about this as it allowed me to go the last mile in making a reproduction
RE: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
2017-07-04 by Malcolm Parker-Lisberg
See: Oxalic acid is slow to attack copper, so
RE: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by keith printy
In the 90’s when I worked in an electronics plant they used ammonium persulfate , I think towards the end though they had to save the used stuff and treat it
RE: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by keith printy
I got some depotting liquid once from where I used to work when they got rid of it. it basically would turn the epoxy into mush that was easily removed. The
RE: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
2017-07-04 by keith printy
Try it on a sample of copper first. Don’t know for sure,but when you get heavy duty radiator cleaner for your car it is oxalic acid .they also put
RE: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
2017-07-04 by Brad
Thanks!! Question – will Oxalic eat at the copper traces if I’ve removed the resist already? I haven’t on one board but the other I have. From:
RE: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
2017-07-04 by Brad
I m considering HCL and peroxide. I just got intimidated when I saw a video and the guy showed all the steps required to handle it all safely. Ferric is a
Re: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
2017-07-04 by Malcolm Parker-Lisberg
Or just gho into the garden and pick some Rhubarb leaves, lots of Oxalic acid in them. Just don t eat any or drink what you make from boiling them or the
Re: Reproducing a vintage computer PCB
2017-07-04 by goofy_36@...
Yep, you are right. My browser was glitching and I had to restart it. But the files are over the 10mb limit. Oh well, I ll have to zip them in smaller
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by Harvey Altstadter
Steve, I didn t want to mention MEK. This is bad stuff. Our company used it in the shop to clean up epoxy spills and the like. A respirator or aggressive
Re: Reproducing a vintage computer PCB
2017-07-04 by alienrelics@...
Yes, you do. Unless you are not logged in. Everyone has access to Files. Steve Greenfield AE7HD listowner Homebrew_PCBs ... Well I don t have rights to the
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by Technotronic~Dimensions
Hi Harvey Great info, thanks. With more stuff out there being designed not to be fixed, and thrown away, I had always wanted to know more about the
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by Harvey Altstadter
Steve, With regard to dissolving epoxy, I have good news, and I have bad news. The good news is that there are chemicals used for depotting encapsulated
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-04 by Russell Shaw
On 04/07/17 04:57, Technotronic~Dimensions ... An easy way is to have a stream of hot air directed at the board (hot air gun on a stand), and pick away at
Re: Reproducing a vintage computer PCB
2017-07-04 by goofy_36@...
Well I don t have rights to the files section. Plus the scans are pretty large. So, they are at the link below. It s on a web site I ran for the daughters
Re: Ferric chloride staining PCB substrate
2017-07-04 by roylowenthal@...
Oxalic acid is also sold as, wood bleach usually findable in hardware or paint stores. Roy
Re: Reproducing a vintage computer PCB
2017-07-04 by goofy_36@...
Nope, I ve had this kit sitting in a box for years. But the discussion about that ebay auction prompted me to get it out again. This then lead to me thinking
Re: Ferric chloride staining PCB substrate
2017-07-04 by Dave Sage
Simple: Don t use ferric chloride. Try HCL and Hydrogen peroxide (which becomes Cupric chloride) or the other old school etchant - Ammonium chloride.
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-03 by Technotronic~Dimensions
Hi Sorta new here and trying to catch on to some of the procedures described here. Was wondering if anyone knows if theres a chemical or chemicals (s) that
Re: [Homebrew_PCBs] Reproducing a vintage computer PCB
2017-07-03 by Martin Heermance
A starting point for reproduction. Since the board is 8 X10 , put the board on a flatbed scanner, scan both sides, and post the results. I bet that GIMP or
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-03 by LEON HELLER
Oxalic acid removes ferric chloride stains. I ve got a big bottle of it somewhere but have never used it. Leon On Monday, 3 July 2017, 2:56, Brad
Re: [Homebrew_PCBs] Ferric chloride staining PCB substrate
2017-07-03 by D. Beans
When I made boards back in the late 70 s I used ammonium persulfate most of the time. Works good, no stains. I have no idea if it s still readily available or
Ferric chloride staining PCB substrate
2017-07-03 by Brad
I have been using ferric to etch boards for a while now. Recently I got lucky and came into a cache of 1973 vintage copper clad PCB stock, which will enable
RE: [Homebrew_PCBs] Reproducing a vintage computer PCB
2017-07-03 by Brad
Did you buy the kit that was sold on ebay a few days ago? From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] Sent: Saturday, July 1,