Re: UV light Source
2012-05-02 by parme
It s difficult to find tubes and the cost is higher than leds. Does this tube work?
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Re: UV light Source
2012-05-02 by psykhon@yahoo.com
Tubes are simpler and an easier way to acchive the necessary uv troughput. Leds are more efficient but you need LOTS of them and a psu
A possible solution to using Brother Laser printers for Toner Transfer
2012-05-02 by leeleduc
I may have a possible solution to using Brother Laser printers for Toner Transfer PCB s. I was at Staples and was able to get a sample print out of a Brother
Re: Updating the toner transfer FAQ, would like pictures.
2012-05-02 by AlienRelics
It s official. I ve got links on the home page of this group and Inkjet_PCB_Construction. And thank you again, James, for putting all that work into it. Steve
UV light Source
2012-05-02 by steve.oconner@ymail.com
Just in the process of converting an old scanner into an exposure box and wondered about using small UV tubes or maybe UV Led s ? Any suggestions would be
Updating the toner transfer FAQ, would like pictures.
2012-05-01 by James Newton
I m not sure if it s official or not, (that s up to our hard working list owner) but there IS a FAQ for making PCB s at home with most of the wisdom of this
Re: [Homebrew_PCBs] Re: Seychelle?
2012-04-23 by Shannon Haworth
I found it after I realized how unique the file names were for the missing images. Did an image search, and vola, there it was. Glad to help. Shannon ...
Re: Seychelle?
2012-04-23 by Jim
Thanks Shannon! I had found the Wayback page but the photos are necessary. I saved the page locally in case it disappears again.
Re: pcb video
2012-04-22 by g3oou@aol.com
Hi All ... way I would go back to that now! I still use that method having got used to it over the years on both small and large boards and having developed a
Re: [Homebrew_PCBs] Seychelle?
2012-04-22 by Shannon Haworth
I found a copy: http://techref.massmind.org/techref/pcb/etch/CuCl2.htm Shannon ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Seychelle?
2012-04-22 by Ron Yost
... The Wayback Machine has the text, but the photos are missing:
Re: Seychelle?
2012-04-22 by Shannon Haworth
The wayback machine stored this: http://web.archive.org/web/20090413154702/http://members.optusnet.com.au/eseychell/PCB/etching_CuCl/index.html No pictures,
Re: [Homebrew_PCBs] Seychelle?
2012-04-22 by Stefan Trethan
Have you tried contacting him directly at a_se*ychell@ya*hoo.com.au ? (delete the *) ST
Re: pcb video
2012-04-22 by designer_craig
Yea, I did quite a few board designs with Bishop Graphics. Initially did the black crape tape then moved on the the ruby tape. Still got a box of the old
Seychelle?
2012-04-22 by Jim
Adam Seychelle s page on Cupric Chloride etching at http://members.optusnet.com.au/eseychell/PCB/etching_CuCl/index.html seems to be defunct. Does anyone have
Re: [Homebrew_PCBs] Re: pcb video
2012-04-22 by Donald H Locker
Take a look at topological routers for curvy lines :) Donald. -- *Plain Text* email -- it s an accessibility issue () no proprietary attachments; no html mail
Re: pcb video
2012-04-22 by tda7000
Certainly sounds doable but I probably won t be trying it... I made only a few boards back then and dropped most of it for some years - When I went back to
Re: pcb video
2012-04-22 by tda7000
The default included libraries are OK but not as extensive as Eagle s. However there are several nice ones available on the internet from 3rd parties. It s
Re: pcb video
2012-04-22 by AlienRelics
... That is one way that I made boards, although I was using photosensitized PCBs. I d lay them out at 2x or 4x size. I figured out what exact percentage
Re: [Homebrew_PCBs] Re: pcb video
2012-04-21 by kabowers@NorthState.net
... Glad to see I m not totally isolated 8=). Back in the 70 s I did some boards by placing the parts on graph paper 1:1, taping the paper to a board, using a
Re: pcb video
2012-04-21 by John
BTW Keith, I think we are neighbors! I live in Julian NC. I was thinking further toward Low Tech solutions. I probably will not go to india ink (as used in my
Re: [Homebrew_PCBs] Re: pcb video
2012-04-21 by kabowers@NorthState.net
... If you really want to do it the old way why not get Kicad, gEDA, Eagle, etc. and print out the symbols you need onto sticky back label paper and trim to
Re: pcb video
2012-04-21 by John
... Actually, I think you can. One of the things on my To Do List is to layout a PC board on some over size graph paper and reduce it in the copier to the
Re: [Homebrew_PCBs] Re: pcb video
2012-04-21 by Donald H Locker
I believe that intuitive is only so to those who get it . And every person s intuitive is different. I can t get Mac, but the Unix (now Linux) command line
Re: [Homebrew_PCBs] Re: pcb video
2012-04-21 by Branko Badrljica
KiCAD is _very_ nonintuitive, at least for me. I like much better gEDA+ PCB combo. It feels much more like good old DOS Tango. Not terribly sophisticated, but
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by Zoran A. Scepanovic
... Sorry, that bird is very non intuitive for me. I used to use sMartwork, Tango, Protel (DOS), OrCAD (DOS), many other Protel incarnations and stopped on
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by John Anhalt
How do KiCAD libraries compare to Eagle? Can you import Eagle? Are there ULP s (like drill-aid.ulp) that help the DIY er? I d like to try it, but I don t
Re: pcb video
2012-04-20 by tda7000
x2 for KiCAD ;) Board has no limit on size or shape, number of nets etc. Only thing limited is you can t have more than 16 layers but this is a more than
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by Randall Morgan
I recall visiting a Fluke Facility back then and they had a positive pressure work environment. They had hoods with suction over anything that produced fumes
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by John Anhalt
In those days, Osha was just a small town in Wisconsin. ;) In truth, I thought the attention paid to ensure real safety was quite commendable, considering
RE: [Homebrew_PCBs] Re: pcb video
2012-04-20 by Tony Smith
Dude has gloves on, OSHA will be happy with that. Tony ... door.
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by Donald H Locker
$$PCB software is not necessary. KiCAD is a free (like no-$ free as well as license-free) schematic capture and PCB layout suite of tools. DesignSpark is a
Re: [Homebrew_PCBs] Re: pcb video
2012-04-20 by JanRwl@AOL.COM
In a message dated 4/19/2012 17:01:30 Central Daylight Time, rmorgan62@gmail.com writes: LOL I know I may be showing my age but I ve had to do this. I wish I
Re: [Homebrew_PCBs] Re: pcb video
2012-04-19 by Randall Morgan
LOL I know I may be showing my age but I ve had to do this. I wish I could still find the Bishop Grapics. They had them in scales of 1:1 2:1: 4:1 and 5:1. Then
Re: pcb video
2012-04-19 by sheldon_mp_cooper
That is interesting. Here s the way Tektronix made their boards many years ago. Screen printing was also involved:
Re: pcb video
2012-04-19 by jackinnj
i can see the OSHA Inspector having a heart attack as they walk in the door.
Re: [Homebrew_PCBs] Re: Spin coating small PCB?
2012-04-19 by Derward Myrick
Back in the early 1960s I worked at a small electronics co. that did contract work for NASA. They used an old record player turntable as their spin coat
Re: Spin coating small PCB?
2012-04-19 by bebx2000
I made one following your original post. It works great, but I found that the viscosity of the material being spun is important. Thanks, Baxter
Re: Spin coating small PCB?
2012-04-19 by designer_craig
FYI -- spinner construction details. The spin coater recently built was constructed from a 4 x4 computer fan. I found one with a metal frame at the local
RE: [Homebrew_PCBs] Re: Alternative photoresist chemicals - Idea?
2012-04-19 by Jeff Heiss
Homemade resist of potassium dichromate and PVA/gelatin/egg-yoke does not stand up to HCl and hydrogen peroxide (I tried it). It seems to work with moderate
pcb video
2012-04-18 by fastlink30
interesting video http://www.youtube.com/watch?v=8-WGaAmpfOU&feature=player_embedded
Re: [Homebrew_PCBs] Re: Alternative photoresist chemicals - Idea?
2012-04-18 by Lessa, Leonardo
Hi Jeff, I did this a long time ago, I need to check my notes. On the top of my mind, I used a regular water soluble emulsion and sensitizing, I follow the
RE: [Homebrew_PCBs] dry film from Think & Tinker
2012-04-18 by Jeff Heiss
Larry, do you still have dry film resist available? I would like to contact you concerning a purchase. Jeff [Non-text portions of this message have been
Re: [Homebrew_PCBs] PCB Drilling Viewer
2012-04-17 by Charles R Patton
Re the alphabet soup URLs. My apologies. I learned a couple of things from this episode. I had done a quick search, copy and paste from Google for the
Re: PCB Printing and production
2012-04-17 by David
Where is the link to see what you are working on?
Re: [Homebrew_PCBs] PCB Drilling Viewer
2012-04-17 by Donald H Locker
Those file URLs with long strings of apparently random characters are temporary and disappear after a few seconds to a few minutes. The file in in the group s
Re: [Homebrew_PCBs] PCB Drilling Viewer
2012-04-17 by JanRwl@AOL.COM
In a message dated 4/16/2012 19:29:54 Central Daylight Time, charles.r.patton@IEEE.ORG writes:
Re: Alternative photoresist chemicals - Idea?
2012-04-17 by designer_craig
Baxter, From your description it sounds like this is a negative acting resist in that the exposed parts cross linked and became insoluable. It makes sense but
Re: Alternative photoresist chemicals - Idea?
2012-04-17 by bebx2000
The best DIY formula for both photoresists and solder mask is contained in this patent, http://www.google.com/patents/US5556735 See Example 2 for an explicit
PCB Printing and production
2012-04-17 by Robert Jones
Dear Sir, It s interesting that I m seeing the discussions in the group about photo resist inks and printing. I d like for you to take a preview of what I ve