Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Adam Seychell
... Yep, I used the BL type for my original light box, and they worked great. You buy them as lamps for insect zappers . Lot cheaper than BLB, and I believe
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Re: [Homebrew_PCBs] Photo PCBs in OZ
2005-01-21 by Russell Shaw
... I get my pcb vendor (melbourne printed circuits) to coat and cut a bunch of boards for me (like 30pcs 20cm x 30cm square). http://www.melbpc.com.au/ I was
RE: [Homebrew_PCBs] UV lamps?
2005-01-21 by Roger, in Bangkok
Somewhere around 10,000 hours half-life as best I recall! Simply means extending exposure times accordingly. Regards/Roger, in Bangkok ...
Photo PCBs in OZ
2005-01-21 by John Craddock
Russell Shaw I notice you are from OZ. Where do you get your photo PCB material from? Regards John C
Re: Cables and connectors - casting
2005-01-21 by Steve
... Or use polyurethane rubber. You can get it in many different grades of flexibility, from hard as a rock to so soft it is sticky. I think those sticky lint
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by mgray@ess-us.com
I don t know if this qualifies as home brew, but I ve used for exposing all my boards. For $30, you can t go wrong:
Re: Cables and connectors
2005-01-21 by Steve
... it to a rubber mold.. would that just collapse the mold? ... You can learn more at the NW Propmasters Yahoogroup, take a look in the Links there. I m
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Russell Shaw
... BLB are dark blue woods glass . White tubes are just BL. The clear tubes are actinic unfiltered and shouldn t be used because of the more harmful
Re: [Homebrew_PCBs] Photographic techniques
2005-01-21 by Russell Shaw
... I can do 8mil traces perfectly using a 720dpi epson stylus color inkjet printer with the genuine film and ink, and uv lightbox. No need for enlarging or
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Russell Shaw
I made a box using a 125W HID globe like the one on the right: http://www.specialtyoptical.com/catalog/160wsb_e24-bl_2712682.htm The blue glass is woods
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Stephen Bartlett
There are two basic types of home-use UV tubes, which look like fluorescent tubes, but are varying shades of dark blue. It has been years since I looked at a
RE: [Homebrew_PCBs] Photographic techniques
2005-01-21 by Roger, in Bangkok
Why mess around? It s very inexpensive to take you 4X (or whatever ...) artwork to a photo studio and instruct them to reduce to your required size film. You
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Terry Mickelson
It looks like I ll be buying some lamps. What should I look for or look out for in florescent types? Terry M
Re: UV lamps?
2005-01-21 by Radra
Check out the following for a homemade UV exposure source: http://www.thinktink.com/stack/volumes/voliii/equipment/uvlamp/uvlamp. htm If you don t need that
Photographic techniques
2005-01-21 by javaguy11111
I am trying to get more information on using photographic techniques for making PCB s. For me I am at the limit of what I can really do with toner transfer and
Re: [Homebrew_PCBs] Re: Cables and connectors - casting
2005-01-20 by Norman Stewart
The big problem with the hardware store silicone (and this goes for the industrial grades too) is that the inexpensive ones release acetic acid in the curing
Re: [Homebrew_PCBs] UV lamps?
2005-01-20 by Norman Stewart
I built one years ago, using a high intensity industrial hi-bay lamp and suitable ballast/transformer. The glass envelope containing the fluorescent material
Re: [Homebrew_PCBs] UV lamps?
2005-01-20 by Earl T. Hackett, Jr.
I hope you don t mean mercury arc lamps. They have the right wavelength (365 nm) for fast exposure, but they can cause serious eye damage. Try some of those
Re: [Homebrew_PCBs] UV lamps?
2005-01-20 by Leon Heller
... From: Terry Mickelson To: Sent: Thursday, January 20, 2005 9:33 PM Subject: [Homebrew_PCBs] UV lamps?
[Homebrew_PCBs] UV lamps?
2005-01-20 by Terry Mickelson
I d like to build a UV box to do positive resist exposure. The presensitized boards are 5 by 7 inches, so the box and lamps need not be too large. Also not too
Re: [Homebrew_PCBs] Re: Cables and connectors - casting
2005-01-20 by Stefan Trethan
... The hardware shop stuff doesn t lend itself to casting i fear. On another note, never try to use acrylic sealant. i didn t have anything else at hand and
Re: Cables and connectors - casting
2005-01-20 by Dale Mosby
Ron - Thanks for the pointer to casting group. I joined that, see a huge number of posted messages and I will look through some of those for information. I was
Re: [Homebrew_PCBs] Cables and connectors
2005-01-20 by Stefan Trethan
... you don t vacuum the mold, you need a small vacuum chamber in which you put the container of silicone or whatever you want to use to cast. the vacuum makes
Re: [Homebrew_PCBs] Cables and connectors
2005-01-20 by James Washer
Ron, thanks for providing this... but can you provide a bit more info? Any name brand silicon I should buy? I have a vacuum pump... but I cannot figure out
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-20 by Stephen Bartlett
Thank you; I just took a look. (This is the first time on many Yahoo-lists that I have ever seen anything in the Database section). I now have a bit more
Re: [Homebrew_PCBs] Cables and connectors
2005-01-20 by ron amundson
... Vertical insert molding machines and molds are actually not that spendy. $100K for a used machine, and a mold would set you up real well, up to a few
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-20 by Stefan Trethan
On Wed, 19 Jan 2005 19:51:06 -0500, Stephen Bartlett ... I m not sure if you also checked the Database section. The right hardware is important, but even with
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-20 by Stephen Bartlett
Stefan, Thank you for your suggestions. I have looked at almost all, if not all of the files section, and a number of related links to sites. I have tried a
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-19 by Stefan Trethan
On Wed, 19 Jan 2005 15:11:44 -0500, Stephen Bartlett ... look in the database section of the group page for working printers and papers. I am not so sure
PCB Method
2005-01-19 by mgray@ess-us.com
Thanks for all the great tips and ideas from the group. I ve built a number of boards for ham radio projects and documented the process on my website:
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-19 by Stephen Bartlett
I am one of the people looking at silk screening for resist application. When I get toner transfer to work, inclulding getting the paper to come off, given my
Re: [Homebrew_PCBs] Silk screen methods at home?
2005-01-19 by Earl T. Hackett, Jr.
I like the concept of toner transfer, but the paper is still a problem. Unfortunately, most paper manufacturers put a lot of development effort into making
Re: [Homebrew_PCBs] Cables and connectors
2005-01-19 by Leon Heller
... From: Dale Mosby To: Sent: Wednesday, January 19, 2005 5:05 PM Subject: [Homebrew_PCBs] Cables and
Re: [Homebrew_PCBs] Re: Cables and connectors
2005-01-19 by James Washer
I think you missed the OP s point. He s asking how to make commercial quality cables . - jim On Wed, 19 Jan 2005 17:59:25 -0000
Re: Silk screen methods at home?
2005-01-19 by Phil
Silk screen for legend print is superior to TT on double sided boards. I d also think it would be good way to make front panels. I m not sure about for resist
Re: Cables and connectors
2005-01-19 by Phil
Can you find PCB mount connectors for all the connector types you use? If so make a little PCB with the two or more connector types on it and the correct
Cables and connectors
2005-01-19 by Dale Mosby
I have made some boards using the toner transfer method with fairly good results. Something closely related is the matter of getting cables connected to a
Silk screen methods at home?
2005-01-19 by mikezcnc
I wonder why would anybody go that route? Paints use solvent and solvents call for ventillation unless someone doesn t believe in it. Bottom line is, there is
Re: [Homebrew_PCBs] Silk screen methods
2005-01-18 by Earl T. Hackett, Jr.
I checked the NazDar web site. They have inks available, but there is a note that they will no longer produce etch resist inks. The material is limited to
Re: [Homebrew_PCBs] Silk screen methods
2005-01-18 by Earl T. Hackett, Jr.
Thanks for jogging my memory. I do remember Naz-Dar as a popular ink. Back when I was wroking in the industry, silk screening was the competitive process so
Re:Screen printing inks
2005-01-18 by Norman Stewart
Here s a link to one mfgr. http://www.nazdar.com/section.asp?sect_pk=238&subsubsection=Application It looks like they might have an on-line store. Norm -- No
Re: [Homebrew_PCBs] Silk screen methods
2005-01-18 by Norman Stewart
I ve used Naz-Dar ink successfully - they re designedto be etch resists - of course, this WAS a goodly number of years and a couple of moves ago. I m not sure
Re: [Homebrew_PCBs] SILK SCREEN PCB
2005-01-18 by Earl T. Hackett, Jr.
Any high temperature paint will do. Epoxy base is common in production. If you want to make your own, just add some white pigment to your favorite 2 part
Silk screen methods
2005-01-17 by Earl T. Hackett, Jr.
It looks like the circuit worked so now I m looking to make more than one or two small boards. I ve managed to arrange the routing so resolution isn t much of
test ..ignore please
2005-01-17 by Etchenique Fabian
Re: Question about soldering double sided boards.
2005-01-16 by Phil
... wrote: ... the ... Wasteful ... That s how I do it. In addition, the wire, before you trim it off, makes a good place to clip on a
Re: [Homebrew_PCBs] Re: Question about soldering double sided boards.
2005-01-16 by Stefan Trethan
On Sat, 15 Jan 2005 23:59:19 -0800 (PST), Tom Stathes ... Nice idea, you might want to use larger pads for vias as the default ones are meant for throughhole
Re: [Homebrew_PCBs] Re: Question about soldering double sided boards.
2005-01-16 by Tom Stathes
I was able to solder those headers by placing the plastic as far aboce the pcb as possile as i could so i couls still solder the bottem. The fact that im
SILK SCREEN PCB
2005-01-14 by cga3a
HELLO. I VE MADE A NUMBER OF CIRCUIT BOARDS AND NEED TO ID SOME OF THE COMPONENTS. I HAVE RUBBER STAMPS THAT I LL USE. WHAT TYPE OF PAINT IS NORMALLY USE ON
Re: [Homebrew_PCBs] magnified drill viewing - optics
2005-01-14 by Stefan Trethan
On Fri, 14 Jan 2005 11:31:29 +1100, Adam Seychell ... Oh i get very good porjection already, on my test setup. I used the convex lens, the picture close to