Re: Before Ironing the Printed Schematic - what do you?
2010-08-19 by jp.gleyzes
Hi, It s a GBC SMART laminator tio which I have increased the temperature by adding a 6.8k resistor to the termistor. And redone the rollers walls because
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Re: Now, tinning
2010-08-19 by fredbutz
I m about to try the Sulfamic acid one. I also got the chemicals on EBay. I ll let you know.
Re: Copper Foil Vias, Correct URL
2010-08-19 by fredbutz
I do it all the time. http://voodooengineering.com/index.php/pcbprocess/plating I don t think its hard at all. Follow Think and Tinker s steps using Caswell
Re: Before Ironing the Printed Schematic - what do you?
2010-08-19 by Frank P
JP, Interesting.... What make and model laminator are you using? Is it modified for you PCB process?
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-19 by Bob Macklin
Does anyone here know how real plated hole vias are made? I DO! And I would not try it at home. That s why I use wires at home. I use a piece of wire wrap wire
RE: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-19 by Tony Smith
... Falls out when soldering, not really a thru via unless it s thin, and soldering both sides makes it more likely to crack, apparently. I still do it though.
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Bob Macklin
HB PCBs are not suitable for PROFESSIONAL boards! The general purpose of HB PCBs is prototype testing. Or low volume hobby stuff. Doing PROFESSIONAL boards
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Leon Heller
... Not suitable for professional boards. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by lists
In article , ... I usually find that things like electrolytic decoupling capacitors and connectors set the height
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Malcolm Parker-Lisberg
Only if you have the headroom to accomodate the extra height! I don t suffer from insanity I enjoy it! ... From: lists
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Malcolm Parker-Lisberg
I think you have misunderstood what we are discussing, if you are doing a double sided board and a track is required to be connected under the device then you
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by lists
In article , ... Yes you can! You use the wire wrap type with the long pins and space them off the board
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Bob Macklin
I use 30ga wire wrap wire. I bend it over on both side. They don t fall out. There are easy ways to me HB PCBs and there are HARD ways to me HB PCBs! Bob
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Bob Macklin
Don t put socket pads on the top side of boards. That s a really dumb thing to do! Bob Macklin K5MYJ Seattle, Wa. Real Radios Glow In The Dark ... From:
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Alessio Sangalli
... It is very easy for that wire to come out while you are soldering it... the hole must be made small enough so there is some mechanical resistance for the
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Malcolm Parker-Lisberg
If you have a socket on the board you can t get at the top pad to solder it! I don t suffer from insanity I enjoy it! ... From: Bob Macklin
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Bob Macklin
What s wrong with simply sticking a wire through the hole and soldering on both sides? Bob Macklin K5MYJ Seattle, Wa. Real Radios Glow In The Dark ... From:
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Leon Heller
... Multicore used to sell little inserts that were pressed into the holes, flared with a special tool, and then soldered on both sides. They are probably
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Malcolm Parker-Lisberg
I tried that method back in the 1980s using a product called Circuitstick and it is not worth the bother, much too fiddly and slow, difficult to get a good
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-18 by Jim Tonne
... ETC I suppose the page is a first attempt to publicize the idea/product. But it really does need to be polished quite a bit. The product has enormous
Re: Copper Foil Vias, Correct URL
2010-08-18 by cdvsmx5
Ken and all, Fear of the unknown doesn t justify bad behavior. When I joined the group, I was hoping to find people that had faced the same problems I did. I
Re: Copper Foil Vias, Correct URL
2010-08-18 by alienrelics
You need to cultivate a much thicker skin to be a salesman. If something when wrong when scanning the example, then scan it again. The mandrel can t get lost
Re: Copper Foil Vias, Correct URL
2010-08-18 by Andrewdavid.mathison
Dear cdvsmx5 I also looked at the web site for your product. I also did not get a good impression of what your product does or how even, in fact what went
Re: GBC laminators
2010-08-18 by Jeff Heiss
The 1701860 and 1701870 have slightly different end plates. I have the cheaper, blue, 1701870 and JP s templates in the file section do not fit it. You can
Re: [Homebrew_PCBs] Re: Now, tinning
2010-08-18 by Larry Battraw
... Has anyone else tried this? I ordered the chemicals off eBay and tried it with sulfamic and sulfuric acid (separate times) and it does not seem to
Re: Copper Foil Vias, Correct URL
2010-08-18 by sailingto
Charl, I do appreciate what you are trying to do and I (nor anyone else I m sure) meant any dis-respect..... Most of us like to know what we re buying before
Re: [Homebrew_PCBs] Re: Nickel and Silver Print from MG for through hole plating
2010-08-17 by DJ Delorie
In the video tutorials I ve seen of similar products, they squeegie and vaccum from *both* sides - first side A to side B, then side B to side A.
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-17 by Bob Macklin
Why don t you just send those interested the instructions. You won t make enough money off this to make it worthwhile. Bob Macklin K5MYJ Seattle, Wa. Real
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-17 by DJ Delorie
The saran wrap web site says their films are Polyethylene - they removed all the chlorine-based variants. I might try it anyway...
Re: Nickel and Silver Print from MG for through hole plating
2010-08-17 by morarcalin
I am really not very sure why but here is what I found. Before doing the board I tested first on a sheet of paper (just did a 3 inch long trace) to see if
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-17 by Erik Knise
The reason he is not giving out any of the information is because he wants you to buy the kit. All of those parts are easily available but you are really
Re: Copper Foil Vias, Correct URL
2010-08-17 by cdvsmx5
Re: You can take it as you say, or as the truth. I didn t expect a parade, but was unprepared for such negativity. How would deceiving you benefit
Re: Copper Foil Vias, Correct URL
2010-08-17 by jamesmichaelnewton
Charl, It looks interesting, but if I paid my money, and got the items you show on the web page, I wouldn t have a clue how to use them to make a through hole.
RE: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-17 by Marc Sulfridge
Most varieties of acrylic (Plexiglas) have very poor transmission of UV wavelengths below 370nm (i.e. they tend to block the Hg I-line). If the photoresist
Re: [Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-17 by Eddie Stassen
Thats a really nasty looking pcb shown as an example. Doesn t really make me want to run out and buy the product :)
Re: Copper Foil Vias, Correct URL
2010-08-17 by alienrelics
... You won t mind unpouching it, then? ... May we see the graphic instructions, then? ... Anyone who is going to pay out money for something investigates it
Re: Copper Foil Vias, Correct URL
2010-08-17 by cdvsmx5
wrote: ... There is no secret, the mandrel is tiny and is only pouched for identification. The mandrel is used to form and then insert a tube
RE: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-17 by Nuno T.
Hi, Have you considered clear acrylic sheets? I ve been using them for a while on the same UV box that came with normal glass on it. The difference is
Re: [Homebrew_PCBs] Re: Nickel and Silver Print from MG for through hole plating
2010-08-17 by Donald H Locker
Sorry to hear of your lack of success. It might have been the thinner, though. MG Chemicals says If thinning is required use M.G. Thinner (Cat. No.
[Homebrew_PCBs] Re: Copper Foil Vias, Correct URL
2010-08-17 by Brian Symons
I agree. The web site doesn t show anything to make you want to buy the item. Without some real info & not just a PR blurb spin I don t think too many will
Re: [Homebrew_PCBs] Before Ironing the Printed Schematic - what do
2010-08-17 by Slavko Kocjancic
... Again Mee. I use Green kitchen scrubbie too. But this time dry! No solvent s at all. And I newer lost a trace. To make job easy I cut aprox 8cm diameter
Re: Nickel and Silver Print from MG for through hole plating
2010-08-17 by morarcalin
Here is the update regarding Nickel Print - NO SUCCESS So I went ahead and bought a jar of Nickel print - 13$ - all good till I open the jar - completely
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-17 by Donald H Locker
Have you considered Saran Original? (I think it s now called Premium.) Polyvinylidene Chloride is quite transparent to UV, but I don t know over what
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-17 by DJ Delorie
I think any of these exotic solutions would ruin the homebrew aspect of my lab. I was hoping for something from the local store, like lexan or plexiglass
RE: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-16 by Marc Sulfridge
CYTOP has excellent transmission ( 95% for a 200um coat) all the way out to 200nm wavelengths. I d suggest using it as a coating over your glass to prevent
Re: Yes, something is wrong, I am NOT a spammer!!!
2010-08-16 by Chris
I contacted Yahoo and my fingers are crossed they can make this problem go away. In the meantime I will try to avoid the groups for a while to see if that
Re: Copper Foil Vias, Correct URL
2010-08-16 by sailingto
Trying to figure how it works, I expect the hidden mandrel is the secret? Do you have a video showing how to make the vias? I would be interested in good vias,
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-16 by Malcolm Parker-Lisberg
Yes, glue your vacuum connection to the rubber, like an inflatable boat, near the edge seal so that it does not seal like a shut off valve when under vacuum. I
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-16 by Malcolm Parker-Lisberg
UVT plastics still have considrable absorption at the actinic wavelengths (50% absorption at 275nm), which are the wavelengths of peak emulsion sensitivity.
Re: [Homebrew_PCBs] UV: alternatives to glass?
2010-08-16 by DJ Delorie
Hmm... my UV box is single-sided at the moment, are you suggesting putting the PCB on a rubber membrane, then the film, then glass - and letting the vacuum