Re: [Homebrew_PCBs] Paste screens.
2010-01-27 by Leon Heller
... They are really intended for prototypes and short runs, I d ask him about durability for your application and whether they are suitable for that chip. I
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Re: [Homebrew_PCBs] Paste screens.
2010-01-27 by Dylan Smith
... Have you used their service? How long can I expect a Kapton stencil to last? I have a few (possibly few tens) of the same board to make and it ll save me a
Re: Paste screens.
2010-01-27 by Trevor
Hi Leon. I appreciate the reply but I am really wanting to know about the Aluminium I found. Think it might be a stronger, more durable material and I can
Re: [Homebrew_PCBs] Paste screens.
2010-01-27 by Leon Heller
... Laser-cut Kapton stencils are quite cheap and will work a lot better: http://www.ohararp.com/Stencils.html Leon -- G1HSM
Paste screens.
2010-01-27 by Trevor
Hi all. I am looking in to paste screens. I have found some 0.2mm ( 8mil ) thick aluminium sheet that I can work with on my milling machine. I was wondering if
Re: [Homebrew_PCBs] Re: Discussion on Toner Transfer Method
2010-01-27 by Brian Lalor
... I spent a few days looking for used cartridges on eBay and finally went to Staples and spent twice as much. I had to parse every word of every listing
Re: [Homebrew_PCBs] Printed circuit board eyelets
2010-01-27 by Leon Heller
... Try Multicore Copperset:
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Leon Heller
... The photoetch process I use is very reliable and repeatable. The big advantage over getting boards fabricated is that I can make a board, assemble it and
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Tony Smith
... Well, he s right. I still make my own though. But not doubled-sided stuff with teeny weeny traces, sod that. ... Snipped irrelavent Blah blah windoze
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Russell Shaw
... Maybe i was a little harsh, because it is still free in terms of immediate price. My only problem is that the original message was dissing making PCBs
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Russell Shaw
... How does: Making your own PCB s is time consuming with questionable quality of the results. align with the very existance of Homebrew_PCBs ? ... It s how
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Tony Smith
... How is this spam? Not free ? F ing hell, you know it is in the context most people think. I suppose if I give you you an iPhone you ll give it back,
Re: setting up the Right Way
2010-01-27 by James
... I m not sure that was spam, perhaps just a satisfied customer? I have no affiliation with the company and have never used them for boards, but what do you
Re: setting up the Right Way
2010-01-27 by James
... Try some vellum paper from an office supply store. It s easier to print on than the transparencies and works really well, it s less likely to have pinholes
Re: setting up the Right Way
2010-01-27 by James
... Those are UHP mercury, or occasionally metal halide lamps. The lamps themselves are expensive, most are over $100 for a replacement bulb. It would work
Re: setting up the Right Way
2010-01-27 by James
... The software is nice, and can be used to make your own boards, but for a one-off or two of a simple circuit, the price is exorbitant. I just made three
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Russell Shaw
... Spamming the list with commercial ads might get you banned. Can i get the source code to Express PCB ? Thought not. It s not free .
Re: [Homebrew_PCBs] Printed circuit board eyelets
2010-01-27 by Terry Mickelson
On 26-Jan-10, at 1:10 PM, Paul Mateer wrote: Keystone has them: http://www.keyelco.com/products/specs/eyeletspec.asp -Reply: Sorry, no good. A wide flange
Re: Discussion on Toner Transfer Method
2010-01-27 by James
... I don t know of a specific seller, but the only time I needed a cartridge for my printer I found one on ebay for $20 that was OEM. Laser cartridges last a
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-27 by Ronald Shaul
Making your own PCB s is time consuming with questionable quality of the results. I ve been using Express PCB (expresspcb.com) for quite a while. Their
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by DJ Delorie
... That s what I do, but I have separate registration holes I add to the board just for that purpose (see my other post). Also, I do this before cleaning the
Printed circuit board eyelets
2010-01-26 by Paul Mateer
Keystone has them: http://www.keyelco.com/products/specs/eyeletspec.asp -- Paul Mateer, AA9GG Elan Engineering Corp. www.elanengr.com NAQCC 3123, SKCC 4628,
Printed circuit board eyelets
2010-01-26 by Terry Mickelson
Where do you buy PCB eyelets? What sizes are available and what s the cost?
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by David Griffith
... I see. The L-shape sounds like a good idea. My reasoning is that if you leave enough space beyond the edge of the board, that space will bow out slightly
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by Stefan Trethan
Sure is. The drilled holes will expose the edge there to under-etching, might want to use mounting hole locations or something. Also, if you raise a burr it
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by Peter Harrison
Is it possible to pre-drill some of the holes and align the artwork overlay against them? Peter Harrison
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by Stefan Trethan
The problem with this is the non-zero width of the PCB. Depending on how you hold things together the films can shift one side relative to the other. A better
Re: [Homebrew_PCBs] Re: setting up the Right Way
2010-01-26 by David Griffith
... There goes that bright idea. ... By the Right Way, I mean to have a mostly self-contained kit of equipment that s simple, effective, and not fiddly.
Re:setting up the Right Way
2010-01-26 by alienrelics
I made a few photographic resist boards long ago, some in positive presensitized boards, some were sprayed by me with negative resist. I didn t have to spin
Re: setting up the Right Way
2010-01-26 by mat_henshall
David, I have tried other methods and came back to the photographic method too, overall cheaper, more reliable and faster. I don t think you need specialized
Re: setting up the Right Way
2010-01-26 by jcarlosmor
No, EPROM erasers do not work with the spectrum of liquid, dry-film, and pre-sensitized PCBs. You do not explain exactly why are you going to do things Right
Re: [Homebrew_PCBs] Re: inkjet resist
2010-01-26 by DJ Delorie
... I have a special footprint in my library that, when printed on transparency, results in a fine-line crosshair in the same spot on all layers. I print one
Re: Discussion on Toner Transfer Method
2010-01-26 by sailingto
Thanks to both Stefan and Chiphead for the comments on OEM vs remanufactured toner cartridges. ... Do you have a link from an ebay seller? I ve looked and it
Re: [Homebrew_PCBs] Re: inkjet resist
2010-01-26 by Brian Lalor
... My very first board was double-sided. I’m using Pulsar’s product. It wasn’t perfect, but I’m very happy with it. I used 2-sided copper clad,
Re: [Homebrew_PCBs] Re: inkjet resist
2010-01-26 by Russell Shaw
... You can place small squares of double-sided foam tape to one film, then place the other film on top to make the pouch. The tape is usually 1/32 thick like
Re: [Homebrew_PCBs] Re: inkjet resist
2010-01-26 by David Griffith
... I suppose a scroll saw with an appropriate blade would do the trick for trimming boards. Half-inch glass slabs seem easy enough to come by, but I wonder
Re: Winboard pcb layout vs. Dell 1720 laser printer
2010-01-26 by grantfair2001
I got Winboard working on my XP computer and can print my layouts on the new printer. Time to warm up the laminator! Thanks to everyone for the good responses;
Re: setting up the Right Way
2010-01-26 by James
... The 99 LEDs look like quite a hassle. I use a 15W U shaped bug zapper fluorescent tube, they work fine with a ballast for an ordinary F15T8, which if
Re: inkjet resist
2010-01-26 by James
... A friend of mine experimented quite extensively and came to the conclusion that the spray on resist is garbage, which is probably why hardly anyone carries
Re: [Homebrew_PCBs] Re: Discussion on Toner Transfer Method
2010-01-26 by Stefan Trethan
Exactly right. The point in buying the off-brand is price in the first place, and unless you run a lot of printers you probably want to save a whole lot of
Re:setting up the Right Way
2010-01-26 by RDHeiliger
I use a sun lamp in one of those aluminum reflector/clip on bulb holders as a uv source. At a foot away the exposure time is about 1 1/2 minutes for negative
Re: setting up the Right Way
2010-01-26 by designer_craig
David, Back in the 70 s and 80 s I did a lot of 2 sided boards using photographic methods, it worked very well. Back then you hand taped you master artwork at
Re: [Homebrew_PCBs] setting up the Right Way
2010-01-26 by Leon Heller
Sorry, URL was wrong. ... Here is my UV exposure unit: http://www.leonheller.com/Photos/UV%20unit.jpg It s made from MDF and some strips of wood, screwed
Re: [Homebrew_PCBs] setting up the Right Way
2010-01-26 by Leon Heller
... Here is my UV exposure unit: http://www.leonheller.com/www/Photos/UV%20unit.jpg It s made from MDF and some strips of wood, screwed tofether and glued. I
RE: [Homebrew_PCBs] Re: Discussion on Toner Transfer Method
2010-01-26 by Chiphead
Jumping in on the Genuine vs generic toner cartridges, based on my experience as an IT Manager, responsible for dozens of laser printers: .
Re: [Homebrew_PCBs] inkjet resist
2010-01-26 by James Bishop
Like the others, I get great results with toner transfer, using a cheap samsung printer and paper from a magazine. I suspect your issue is with your
Re: Discussion on Toner Transfer Method
2010-01-26 by sailingto
Stefan and others - Stefan, you make the comment about the need for a genuine HP cartridge for toner transfer. Is this true of most all HP printers? I m
Re: [Homebrew_PCBs] setting up the Right Way
2010-01-26 by James Bishop
I found that an old overhead projector worked. It needs to have a mercury lamp (they are the more modern version, with whiter light, mine is 3M brand). About
Re: [Homebrew_PCBs] setting up the Right Way
2010-01-26 by Simao Cardoso
... http://translate.google.pt/translate?u=http%3A%2F%2Fwww.chirio.com% 2Fbromografo_uv.htm&sl=it&tl=en&hl=&ie=UTF-8 Or for you guys.
Re: [Homebrew_PCBs] setting up the Right Way
2010-01-26 by Larry Battraw
... Get one or two bug zapper U-shaped lights and a ballast for T-40 lights (and a AC plug and wire) and you re in business. I ve been doing it that way for