Re: [Homebrew_PCBs] DIY Gold Fingers?
2016-09-20 by <n0tt1@...>
Just FYI.... www.caswell.com has gold plating solution (VERY expensive).... no experience here with using the gold, but I ve used their silver plating solution
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Re: Cermark Laser marking for PCB resist?
2016-09-19 by Cornelis van Rensburg
Witj my CO2 laser I had to play a bit with the power settings. Too low and the paint did not vaporize properly. Too much and you actually damage the copper
Re: [Homebrew_PCBs] Re: Cermark Laser marking for PCB resist?
2016-09-19 by dave
when you say burn it off with a laser what laser are you using? maybe a cnc machine? dave On 9/19/2016 10:59 AM, Tony Smith ajsmith1968@gmail.com ... when
RE: [Homebrew_PCBs] Re: Cermark Laser marking for PCB resist?
2016-09-19 by Tony Smith
You don’t need high temp paint, I think anything will work. I recall reading a recommendation to use water-based polyurethane (clear top coat) as it
Re: [Homebrew_PCBs] Re: Cermark Laser marking for PCB resist?
2016-09-19 by Les Newell
... I have tried this with a range of different paints and the problem I have found is that the paint doesn t burn off cleanly which interferes with the
Re: Cermark Laser marking for PCB resist?
2016-09-19 by jamesmichaelnewton@...
Hang on... I don t think everyone understand the idea here, which is already working just fine for at least some members (who I would REALLY love to see
DIY Gold Fingers?
2016-09-19 by yahoo@...
Hello All, Has anyone come across an inexpensive way to gold plate some connector contacts on a PCB (or for that matter connector pins?). There are some
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-19 by cornelis van Rensburg
In my mind spray paint is cheaper and you don t need to handle the board in darkness or enclose the laser engraver etc. and you only get 1 chance with a UV
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-19 by Cristian
... Bungard (a German company) is doing that with a 120mW UV 420nm laser module, at a reasonable speed. That means it can be done and sold. You can see my
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-19 by Howard Chester
About a year ago I posted a querie about using a UV LED or low power UV Laser to activate the resist on pre coated PCB using a CNC Rig.At the time of posting a
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by Tony Smith
1.5cm/s isn’t that bad if you just do the outlines of the traces, same as how people mill PCBs. Diptrace has an option where you can export the outline, I
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by alienrelics@...
I love this group. Steve Greenfield AE7HD ... I’d say ‘No’, the main reasons being the Cermark is very expensive, doesn’t work all that well on copper
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by Tony Smith
I’d say ‘No’, the main reasons being the Cermark is very expensive, doesn’t work all that well on copper and doesn’t appear to work well as an etch
Sensitive PCB laser exposure
2016-09-18 by Cristian
Hi, list Could you recommend me a 405nm 100-150mW laser module with a round dot output focusable to 0.1mm diameter at a reasonable distance for a CNC machine,
Re: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by Cornelis van Rensburg
No, the paint would not make a great solder mask. the paint removal by laser only works well because the laser lacks to power to harm the copper. if the copper
Re: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by Cristian
... Is about the energy or what? That is the question. Anyway is more rapid than toner transfer and 1W laser is not so expensive. Cristian
Re: Cermark Laser marking for PCB resist?
2016-09-18 by alienrelics@...
That seems like it will work with those low power Laser diodes in the 1 to 5W range. After etching, the Laser could be used to remove the paint only from the
Re: Cermark Laser marking for PCB resist?
2016-09-18 by alienrelics@...
Yikes! Melted glass. That might count it out as an etch resist, simply because I have no idea how you d remove it without mechanically scraping it off. Steve
Re: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-18 by alienrelics@...
I don t know. 1.5cm per second is pretty slow. Steve Greenfield AE7HD ... Are those solutions color sensitive or only thermal sensitive? Why not 1W laser with
RE: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-17 by Jeff Heiss
It looks like a pigment is used to absorb the light where it then melts and fuses to the material.
Re: Cermark Laser marking for PCB resist?
2016-09-17 by Cornelis van Rensburg
I have one of those k40 co2 lasers. I spray paint the pcb with black spraypaint and let dry. Then I use the laser engraving function to burn away the paint
Re: [Homebrew_PCBs] Cermark Laser marking for PCB resist?
2016-09-17 by Cristian
... Are those solutions color sensitive or only thermal sensitive? Why not 1W laser with reduced speed 10 times (from the recommended 15cm/sec) for the LMM14
Cermark Laser marking for PCB resist?
2016-09-17 by Steve Greenfield
Anyone tried this stuff? Spray it on, run a Laser over it, it turns black and waterproof/permanent. A wet sponge wipes off the unLasered portion.
Re: [Homebrew_PCBs] HEAVY METAL toner transfer
2016-09-05 by Rob
A WAFFLE IRON! NICE I like it this idea. square... uniform heat from both sides. I would give up the paper experiments though. Toner heat transfer paper costs
Re: [Homebrew_PCBs] HEAVY METAL toner transfer [1 Attachment]
2016-09-04 by Mark Schoonover
Similar concept to my PCB Press: http://www.ka6wke.net/finished-projects/pcb-press On Sat, Sep 3, 2016, 21:38 roomberg@ptd.net [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Exposed pads
2016-09-03 by Harvey White
... NXP electronics gives temperature curves (and durations) for their surface mount chips. That might give you an idea of what was involved. Harvey
HEAVY METAL toner transfer
2016-09-03 by roomberg@...
I m new here. I thought I posted this but I got no email so I ll try it again. I was working through laminator toner tranfer mods and melted a plastic gear
RE: [Homebrew_PCBs] Re: Exposed pads
2016-09-03 by keith printy
When I worked at an electronics plant the surface mount boards were soldered by passing them through a conveyer oven. It would melt the paste and bond the
HOT PLATE TONER TRANSFER
2016-09-02 by roomberg@...
I was very pleased with the results so I thought I would share the simplicity of using two one inch thick steel 6 inch square plates on a $10 hot plate. The
File - monthly.txt
2016-09-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
Re: Asian toner transfer paper
2016-08-31 by Kevin Byrne
Thanks, will keep that in mind myself. Best kevin
Re: Asian toner transfer paper
2016-08-31 by AncelB
I used this: Ebay # 291843905734. Had lots left over , can do quite a few rollers. To wrap properly you need someone to hold the roller and slowly rotate it
Re: Exposed pads
2016-08-31 by anickol@...
Yes, it is possible. You can use a heat gun. There is another method, that requires only soldering iron, but I never tried it. They say it works with SO8
Re: LJConfig 1.2 allows you to easily modify the settings of supported HP LaserJet printers ---> Re: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-30 by Kevin Byrne
This brings up a question to any one that knows I am new to this and how do I double check to see if it works with my printer as it is not listed but all seems
Kapton Tape
2016-08-30 by camillus_blockx@...
This is a good source for kapton tape, reasonable price and good choice of width s.
KAPTON TAPE
2016-08-30 by camillus_blockx@...
Hi all, I found this source for Kapton tape, good choice of width s and reasonable prices.
Re: Asian toner transfer paper
2016-08-30 by kbyrne10@...
What is the width of that Kapton and how can that be affordable as I looked into prices? What is your source of Kapton?
Re: Asian toner transfer paper
2016-08-30 by AncelB
The laminator rollers need cleaning due to the surface degradation (powdering/stickiness) from high heat cycling. This causes the roller to tug on and flex the
LJConfig 1.2 allows you to easily modify the settings of supported HP LaserJet printers ---> Re: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-29 by Martin O'Shield
Leeleduc, My replies inline: On Sun, Aug 28, 2016 at 5:32 AM, leeleduc@yahoo.com [Homebrew_PCBs]
RE: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-29 by soffee83@...
Brad (sorry, hadn t checked in here for a couple days), Yeah, the yellow paper is weird like that. I have a feeling you have to use that TRF with it. Like I
Re: [Homebrew_PCBs] Re: Exposed pads
2016-08-28 by Dennis Shelgren
Heat guns can work if you are very careful. Ignore Youtube, use a test piece and measure the correct height away for the temperature you need and watch how
Re: Exposed pads
2016-08-28 by alienrelics@...
I think you mean solder , not weld . You mean the metal square on the bottom of some surface mount ICs. Yes, that can be difficult without a soldering oven.
RE: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-28 by Kevin Byrne
Laser Jet Configurator is what the program says at the top of it. i will search for it again if need be. just let me know. Kevin
RE: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-28 by leeleduc@...
What freeware do you use with your HP LaserJet P2015dn?
Exposed pads
2016-08-28 by iz5fcy@...
Hi to all, as we possible to weld the exposed pads IC, not having an oven? Thanks in advance, IZ5FCY Roberto
RE: [Homebrew_PCBs] White toner for silkscreening
2016-08-28 by Brad
Weird. Here s an ebay link to a bag of the stuff. Expensive! This is for Okidata.. maybe the Samsung/Okidata/etc are similar. The actual OKI white toner
Re: [Homebrew_PCBs] White toner for silkscreening
2016-08-27 by Brad Thompson
... Hello-- MalwareBytes raises a malicious website blocked alarm when I click on any of the various toner categories (e.g., For Canon ). There s a
RE: [Homebrew_PCBs] Re: Asian toner transfer paper
2016-08-27 by Kevin Byrne
I just did a power supply brd with white glossy on one side of paper and dull other side bought from orient over a year ago. Use glossy side only. I use a HP
RE: [Homebrew_PCBs] White toner for silkscreening
2016-08-27 by Brad
Cruised a bit through this website.. check this out: http://www.tprtoner.com/products_info/Factory-direct-sell-for-Samsung-white- toner-ML1610-334159.html The
White toner for silkscreening
2016-08-27 by Brad
Just running this over in my head and wondering what pitfalls there would be. As you probably know, there are a couple of commercial laser printers out that