Re: making PCBs with solder resist layers
2008-10-13 by trevwhite74
... that is ... I just thought about this. You mask the areas that you want to remove. So all the pads are masked off. Then you expose it to UV. Then you clean
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Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-13 by Stefan Trethan
I find a piece of foam rubber or a cheap kitchen sponge is ideal for the purpose. It really grabs the paper residue. Try rubbing mostly along the length of the
Re: [Homebrew_PCBs] Re: Toner Transfer
2008-10-12 by Myc Holmes
Ed, Add a little automatic dishwasher detergent to the soaking bath. The alkalinity and wetting agents help dissolve the residue. Then use a toothbrush to
Re: Toner Transfer
2008-10-12 by Ed Smith
Hi All, I am making a small SMT 1 X3/4 board with 10 mil lines and spaces. Using a Samsung 1430 printer and HP PhotoGloss laser paper. The transfer looks
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-12 by DJ Delorie
... Try sodium hydroxide (lye, drain cleaner) - about the same concentration as the developer. For my film, I drop it in that long enough to soften the film.
Re: Dry film woes, maybe the developer is at fault?
2008-10-12 by pixelcanvas
So this is how the first boards turned out: Picture link
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-12 by Stefan Trethan
Proxxon makes circular saw blades entirely out of tungsten carbide. Those should hold up reasonably well. I ve tried one and the cut is perfectly smooth and
Re: Dry film woes, maybe the developer is at fault?
2008-10-12 by pixelcanvas
Well, so... I bought a handful of 5mm UV LEDs (40) soldered on a bradboard in groups of 2 LEDs in series because I only had a 7808 voltage regulator at hand,
RE: [Homebrew_PCBs] Re: Cutting FR4
2008-10-12 by BadHabit
I love Harbor Freight From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of pcb.easy Sent: Friday, October 10, 2008 4:42 PM
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-11 by Harvey White
... Most of the cheap diamond bits are likely to clog rather quickly IMHO, and as such, you can wear off the adhesive before you do much to the bit. I still
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-11 by Steve
Good caution, Stefan, regarding the dust created when working with FR4, thank you. And thanks to all for the ideas. Another source suggested the use of a
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-11 by Harvey White
On Sat, 11 Oct 2008 17:28:36 +1100, you wrote: The original Kodak KPR liquid resist was short wave UV sensitive. You used bare mercury arc fluorescent bulbs
Re: [Homebrew_PCBs] Dry film woes, maybe the developer is at fault
2008-10-11 by VK3YV
Sodium Carbonate also known as Soda Ash used for adjusting swiming pool PH. Don VK3YV.... ... From: leon Heller To:
Re: [Homebrew_PCBs] Reversing film.
2008-10-11 by ST de Feber
And what about Arista film ? http://www.freestylephoto.biz/sc_main.php?cat_id=406 best regards Simon
Re: [Homebrew_PCBs] Dry film woes, maybe the developer is at fault
2008-10-11 by leon Heller
... From: David Hopkins To: Sent: Saturday, October 11, 2008 3:49 AM Subject: [Homebrew_PCBs] Dry
Re: [Homebrew_PCBs] Reversing film.
2008-10-11 by leon Heller
... From: David Hopkins To: Sent: Saturday, October 11, 2008 3:32 AM Subject: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-11 by VK3YV
Hi ,The picture of the lamp in the instructions looks like a sunlamp (UV) type of lamp by the shape. There is no description as to what the film is sensitive
Re: [Homebrew_PCBs] Reversing film.
2008-10-11 by VK3YV
Hi David, I have been down the same road making negs from artwork. The only thing left that I know of and I have been using for a while now is what appears to
Re: [Homebrew_PCBs] Re: Cutting FR4
2008-10-11 by Stefan Trethan
That s one reason why i use a shear. The edges aren t quite as clean but each set of lungs lasts twice as long ;-) A respirator is only part of the solution,
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-11 by Harvey White
... For commercially available boards (GC electronics), board about 8 inches from the lamps, lamps 18 inch 15 watt black lamp fluorescent (not what s
Dry film woes, maybe the developer is at fault
2008-10-11 by David Hopkins
I wonder if the resist is anything like the Riston blue -Ve acting dry film. This film is the main one used by the manufactures here. It sounds a lot like it.
Reversing film.
2008-10-11 by David Hopkins
Gentlemen, For over thirty years I have been making PCB boards using a photographic method. The pre coated board I have been using is -ve acting. This requires
Re: Dry film woes, maybe the developer is at fault?
2008-10-11 by pixelcanvas
... Yes, the translation is correct, but I have serious dubts about it s usefulness. For example it does say to use a 100W light bulb for 15 minutes to expose
Re: [Homebrew_PCBs] Dry film woes, maybe the developer is at fault?
2008-10-10 by Harvey White
On Fri, 10 Oct 2008 13:33:03 -0000, you wrote: There are two things that might be wrong that come to my mind. 1) you may have too strong a developer. Not
Re: Cutting FR4
2008-10-10 by pcb.easy
I have found and use a small 4 table saw from Harbor freight ITEM 93211-1VGA works really well for small (less than 12 square inch)PCBs. The saw is often on
Re: Cutting FR4
2008-10-10 by Paul Symansky
I ve found that a pair of sharp scissors work well if cutting 1/32 or thinner boards. Paul Symansky [Non-text portions of this message have been removed]
Re: Dry film woes, maybe the developer is at fault?
2008-10-10 by warrenbrayshaw
... As this appears to be Wara product try the manufacturers web site to confirm your translation was correct. http://www.warapcb.com/dryfilm.php All the best
Re: [Homebrew_PCBs] Dry film woes, maybe the developer is at fault?
2008-10-10 by DJ Delorie
I use Adam s wet method - rinse the film and use a squeegie and hot air gun to laminate it. But, if you re just short of melting the film, I think you ve got
Re: [Homebrew_PCBs] Cutting FR4
2008-10-10 by Harvey White
... I use a carbide rasp in a mill. Probably not all that much help to you. Harvey
Dry film woes, maybe the developer is at fault?
2008-10-10 by pixelcanvas
Hello, new member here. I joined because I think this should be the best place to solve a problem I m having with a dry film I m testing (never used this
Re: Cutting FR4
2008-10-10 by Dale
I personally use a Dremel tool with a cutoff wheel. Takes some practice on cutting with the cutoff wheel without shattering it but once you get used to it I
Re: [Homebrew_PCBs] Cutting FR4
2008-10-10 by Stefan Trethan
Well you could use a router or even a CNC mill. A x/y table or maybe even just a guide pattern would suffice. You could also use a punch to make the holes.
Cutting FR4
2008-10-10 by Steve
What are good ways to cut FR4 to a desired size and shape? Often times I need square or rectangular shapes, but occasionally I need an offset or or otherwise
Re: [Homebrew_PCBs] making PCBs with solder resist layers
2008-10-10 by Stefan Trethan
I think you can get away with a cheaper laminator setup. The advantage of the film is you can photo-process it. I do not know how much use a screenprinting ink
Re: [Homebrew_PCBs] Re: PCB spray etcher
2008-10-10 by Stefan Trethan
I m not sure if they work very well. The mechanism looks similar to what Radix sold (they went bust). I have heard some complaints about those etchers but so
Re: making PCBs with solder resist layers
2008-10-10 by trevwhite74
Thanks Leon. I have sent them an email, lets see what they say. Trev
Re: [Homebrew_PCBs] making PCBs with solder resist layers
2008-10-10 by leon Heller
... From: trevwhite74 To: Sent: Friday, October 10, 2008 11:48 AM Subject: [Homebrew_PCBs]
making PCBs with solder resist layers
2008-10-10 by trevwhite74
Hi all. I am really interested in making some pcbs with solder resist. I have looked on the megauk site and found the following products. Has anyone used
making PCBs with solder resist layers
2008-10-10 by trevwhite74
Hi all. I am really interested in making some pcbs with solder resist. I have looked on the megauk site and found the following products. Has anyone used
Re: PCB spray etcher
2008-10-10 by stdf23173
And this one also http://hw-electronics.de/ They sell spray etch impellors for 34 euro ! ST
PCB spray etcher
2008-10-10 by stdf23173
Has any one seen this ? It is in german but i think the pictures are self explanatory http://www.progforum.com/showthread.php?t=6740 grtz Simon
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-08 by leon Heller
... From: Gene To: Sent: Wednesday, October 08, 2008 8:52 AM Subject: [Homebrew_PCBs] Re: Getting ready to
Re:Laser Printer
2008-10-08 by gnuvvekaavaali
I used a Samsung SCX-4200 MFC printing from Eagle on Linux and it works fine for toner transfer. The Linux drivers are Samsung Unified Linux Drivers from their
Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-08 by Gene
... I recall reading an article about a fellow who regenerated his Ferric Chloride by using electrolysis. He d use iron for (I think) the cathode and a
Mechanical Etching
2008-10-07 by Ground Grunging
Hello, I ve been etching my PCB for two years without using FeCl. I simply use a Dremel tool with a vacuum cleaner to avoid dust dispersion. Do you know other
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-07 by Leon
... From: Stefan Trethan To: Sent: Tuesday, October 07, 2008 12:34 PM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-07 by Stefan Trethan
I ve seen copper kettles and pots and pans.... ;-) ST ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-07 by Leon
... From: Stefan Trethan To: Sent: Tuesday, October 07, 2008 11:20 AM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-07 by Stefan Trethan
As long as you don t dispose of a large amount at once in this way i don t expect a problem. What constitutes a large amount probably depends on the size of
Re: [Homebrew_PCBs] Re: Getting ready to switch from Ferric Chloride to ???????
2008-10-07 by Leon
... From: Adam Seychell To: Sent: Tuesday, October 07, 2008 10:53 AM Subject: Re: [Homebrew_PCBs]