Re: Acid etch time
2012-07-09 by leeleduc
I use this technique all the time. I can do a 2X4 inch, 1 ounce board in about 1.5 to 2 minutes. I use 1 Part 31% HCL and 2 Parts 3% H2O2. I make just enough
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Acid etch time
2012-07-09 by txtom2
I just mixed up some Muriatic Acid and Hydrogen Peroxide (1:2) and tried etching a very small piece of PC board (cleaned and with no mask)to see how long it
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-09 by Robin Whittle
Short version: More information on Poly Vinyl Alcohol. Hi Stefan, ... I initially wrote that the Helmar Acid Free glue:
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-09 by Robin Whittle
Hi Donald, ... This liquid has no colour. When dried it turns into a firm, clear, plastic-material which is uncoloured (except for browning in the oven at
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Stefan Trethan
I haven t dealt with PVOH before, only with PV-Acetate, which this obviously is not. PVOH is readily available and cheap, so it would not be difficult to try
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Donald H Locker
I m quite sure it is gum arabic , which is a very common paper adhesive where toxicity might be an issue (stamps,
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Robin Whittle
Hi Stefan, Thanks for finding the MSDS for the paper gum glue I used: .
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Stefan Trethan
Apparently this is a PVA glue after all. Does it
Re: [Homebrew_PCBs] DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Stefan Trethan
I would guess your gum my be either gum arabic or water glass (sodium silicate). Try to get the MSDS (material safety data sheet). ST
DIY laser transfer paper with water-based "gum" glue
2012-07-08 by Robin Whittle
Here is a potentially novel way of making laser toner transfer paper at home. It requires some ~140gsm card (at about 180um, thicker than standard 80gsm laser
Re: GBC H220 HeatSeal QuickStart 9.5" LAMINATOR connections pcb
2012-07-07 by krisfr
... Does anyone have a picture or the correct conections to the circuit board inside this machine? I took mine apart, but lost my diagram. I had hoped to
Re: I Probably missed this but...
2012-07-07 by doc_savage_bronzeguy
If you can print with ABS it will come right off with acetone. Other types of plastic are harder. Polystyrene is hard to get off with acetone and PETE is
Re: I Probably missed this but...
2012-07-03 by AlienRelics
Managing trace width might be tough. I think my Ultimaker has a 0.3 or 0.4mm head, but of course the track it leaves would be wider as the plastic squeezes
Re: I Probably missed this but...
2012-07-03 by Mike
Hello Mars. I am also a part time reprapper, although not as active recently. On the reprap forum I post as the rocket_scientist. Yes, it would be VERY nice if
RE: [Homebrew_PCBs] I Probably missed this but...
2012-07-02 by MIKE DURKIN
How hard would it be to remove once eched? ... From: Mars Bonfire Sent: 2 Jul 2012 14:41:00 GMT To: Homebrew_PCBs@yahoogroups.com Subject: [Homebrew_PCBs] I
Re: I Probably missed this but...
2012-07-02 by tda7000
... As an etch resist I imagine it would work, as long as it stuck to the copper well enough. After all, melted plastic is pretty much what toner-transfer is,
I Probably missed this but...
2012-07-02 by Mars Bonfire
I must admit I enjoy reading this group, not the least of my enjoyment from the diversity of ideas on how to make pcbs at home. I am a toner transfer
RE: [Homebrew_PCBs] Reducing the diffusion of paper and plastic film laser-printed photo tools
2012-07-02 by Boman33
Thanks Robin for the detailed information. I am also interested in how to obtain high quality photo tools and on and off have been testing over many years. A
Reducing the diffusion of paper and plastic film laser-printed phototools
2012-07-02 by Robin Whittle
Please see my previous message for a discussion of the desirable properties of phototools, and about printing with a 1200 DPI laser printer. In the future, I
Transparent, non-diffused, phototool with a laser printer and laminator
2012-07-02 by Robin Whittle
Here is a potentially novel technique for making transparent water-clear (very low optical diffusion) phototools with a laser printer and a laminator. This
Riston MM540 from Czech Republic and UV wavelengths
2012-07-02 by Robin Whittle
In Re: das-labor.org UV scanner direct exposure of photoresist , Duane ... There are multiple types of DuPont Riston, and I guess many other non-DuPont
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by tda7000
Ebay seems cheap: http://www.ebay.com/itm/200-x-SMD-SMT-0603-Super-bright-UV-Purple-LED-/110611085621 I got some 5mm UV LEDs from Chris on here, he originally
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by tda7000
No worries I haven t found anything else so far, but I ve come to realise that there are many good things on the internet that aren t easy to find as they re
Re: [Homebrew_PCBs] Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by Duane C. Johnson
Where do you get UV SMD LEDs. They seem very expensive? What wavelength should I look for? Duane -- Home of the $35 Solar Tracker Receiver
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by wayne.causey
tda7000, Thanks for all three links concerning Laser Direct Imaging for PCBs. Any further links/sources for info on this topic will also be appreciated.
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by Robin Whittle
Hi Wayne, It was tda7000 who first mentioned this project. I responded with a new subject in the hope that this would make it easier to find in the archives.
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-02 by tda7000
I believe I posted the links about the German project? ...Anyway... Another idea was here: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?66471 The
Re: das-labor.org UV scanner direct exposure of photoresist
2012-07-01 by wayne.causey
Robin, thanks for providing the links for an outstanding Laser Direct Imaging project. Does anyone know of any similar projects? Wayne
RE: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-07-01 by Tony Smith
... technology is ... pretty ... one of ... Actually, just looking at the spec for the Oki C711 I see 1200 x 600 DPI, so they re pulling the old scanner trick.
RE: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-07-01 by Tony Smith
... Brother make a couple, eg http://www.brother-usa.com/printer/ModelDetail.aspx?ProductID=HL3075CW but tend not to mention it s a LED printer, just a colour
RE: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-07-01 by Jeff Heiss
Could you provide a make/model of one that is still made today? Jeff _____ From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf
RE: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-07-01 by Tony Smith
... worked ... rows of ... paper. ... Surprisingly they still make those, they don t seem to be very common though. They ve been around for a while, I
das-labor.org UV scanner direct exposure of photoresist
2012-07-01 by Robin Whittle
In Re: pcb-specific laminator/exposure/etc printer... , on 2012-07-01, ... This looks difficult to do, by most standards, since there is customised hardware
Pcb wire ARRagments
2012-06-30 by yousufsaleem54
I m user of express Pcb it is very hard to place connection between one to other copmonent when thier are many components ......can any body gide me to any
Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by tda7000
Much easier to do this, I would think: http://www.youtube.com/watch?v=fi4P-Bwc6g8 http://www.das-labor.org/wiki/LaserExposer
Re: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by kabowers@NorthState.net
... What says you can t space the LEDs farther apart across the narrow dimension and place the board in a carrier? Then make multiple passes with the carrier
Re: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by BOOTS HUGHSTON
I had a Brother Printer that was an LED printer about 10 years ago, it worked great. I used it for years. It had a bar that went across the paper with 4 rows
Re: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by Benjamin Blumer
I was thinking a single row of LEDs with the board being carried through by push wheels. Not quite as snazzy as one LED/pixel, though more feasible perhaps.
Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by Andrew
... DJ, this sounds like a project that is right up your alley! :)
Re: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by DJ Delorie
... Standard LED laser printers are up to 1200 dpi (8.5*1200=10,200 LEDs), no reason why you couldn t do 1000 dpi. You d only need one row of them, so for a
Re: pcb-specific laminator/exposure/etc printer...
2012-06-30 by AlienRelics
A few people here did some tests with toner transfer to determine if 300dpi or 600dpi Laser printer resolution was sufficient. The end result was that 600dpi
Re: [Homebrew_PCBs] Re: pcb-specific laminator/exposure/etc printer...
2012-06-29 by Benjamin Blumer
I like the idea of an area of LEDs. I wonder what kind of resolution / LEDs/inch one could get. Sent from my iPad On 2012-06-29, at 8:30 AM, designer_craig
Re: pcb-specific laminator/exposure/etc printer...
2012-06-29 by designer_craig
Janes, The UV laser has been done -- check back in the archives Zoltan built a system basically replacing the print head with a UV laser diode and raster
Re: [Homebrew_PCBs] pcb-specific laminator/exposure/etc printer...
2012-06-29 by eugenio
In the fabs there s a system call LDI, laser direct imaging, it s similar to the laser system of a laser printer but it s a uv laser instead infrared, and
Re: [Homebrew_PCBs] pcb-specific laminator/exposure/etc printer...
2012-06-29 by Riley
might be more likely as a printhead for fab@home / reprap / makerbot -- Riley Subject: [Homebrew_PCBs] pcb-specific laminator/exposure/etc printer... To:
Re: pcb-specific laminator/exposure/etc printer...
2012-06-28 by James
... I suspect it will be difficult to come up with something that will be affordable yet offer decent performance. I m intrigued at the thought of a laser
Re: Inconsistent scaling with Samsung ML-2165
2012-06-28 by AlienRelics
Or you could add a gear to the platen and use a matching linear gear on the tray. I have several Epson Stylus 3000 printers, if anyone is close to Lacey, WA
pcb-specific laminator/exposure/etc printer...
2012-06-28 by DJ Delorie
Is it time for someone to purpose-design a direct-to-pcb printer? Probably way too expensive to consider, but still... Maybe something that laminates UV film
Re: Inconsistent scaling with Samsung ML-2165
2012-06-28 by Leslie Schwartz
Possibly a printer like the old Espon Stylus 3000 which has a tractor feed mechanism could produce more accurate direct prints? I would not be able to modify
Re: [Homebrew_PCBs] Re: Inconsistent scaling with Samsung ML-2165
2012-06-28 by eugenio
Hi guys, in the last two years i ve implemented every imaginable way of making pcb s at home. One of these ways was Mark Lerman s direct laserjet printing,