Re: [Homebrew_PCBs] Re: Need hint on tonner transfer paper
2008-10-24 by Herbert E. Plett
aha! photocopier.... the chances of toner (surface) mishandling are very high! try Epson glossy photo paper, works for me. do NOT handle the paper before or
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Re: [Homebrew_PCBs] LED heat sinks
2008-10-23 by DJ Delorie
... Heh. Wait until you start playing with SOT-523 s and 01005 s. They don t fall so much as vanish .
Re: [Homebrew_PCBs] Re: How fine can you etch with toner transfer?
2008-10-23 by DJ Delorie
... Well, yeah. Relatively speaking though, I can compare 0.833 mil to 0.174 mil and say it s much more accurate . What I really mean is that the line sizes
LED heat sinks
2008-10-23 by Dylan Smith
Hi all, Tonight I built two breakout boards for Luxeon power illuminators, the first, the switch mode regulator to run the LED, and the second for the LED
Re: How fine can you etch with toner transfer?
2008-10-23 by martin_schoenegg
... within ... No this only means, hat you can adress this resolution. May be the stepsize comes in this region, but there is nothing said about the size of
Re: Need hint on tonner transfer paper
2008-10-23 by Ernesto
... Plus HP Photo Paper higi-gloss for inkjet. It s more expensive than any other paper but it works really well, down to a few mils (200um). With a laminator
Re: Need hint on tonner transfer paper
2008-10-23 by Ernesto
... oil) in ... adhesion ... check. ... Hi Stephan!! I didn t use a laser printer, I ve made photocopies with a recent machine. I ll review the cleaning staeps
Re: Need hint on tonner transfer paper
2008-10-23 by Ernesto
... Hi!! Are you sure that it s commercialized in France? I couldn t find it in the internet... Ernesto
Re: Need hint on tonner transfer paper
2008-10-23 by Ernesto
... Hi Brian I ve tried also with glossy magazine paper but I couldn t get good results, lots of tracks cuted, and the tonner sticks out easily, but perhaps
Re: Need hint on tonner transfer paper
2008-10-23 by Ernesto
... MANY THANKS Herbert, Brian, Stephan, Michel, fan_nastelroy for your answers!!! In order to answer you all: I ve made other trys, with the same paper EPSON
Re: [Homebrew_PCBs] Re: Dry film- negative resist... First attempt failure
2008-10-23 by Adam Seychell
... Your best bet is to measure out 100 grams of sodium carbonate and make up a 500ml concentrate solution (i.e 200g/L). That way you don t need +-1g accuracy.
Re: [Homebrew_PCBs] Re: How fine can you etch with toner transfer?
2008-10-23 by DJ Delorie
... Sigh, wrong math, right results. 1/600 is 1.666 mil, not 1.333 mil, resulting in possible trace widths of: Pixels Width (mils) ... 0 0.000 1
Re: How fine can you etch with toner transfer?
2008-10-23 by calvingrier
... the ... my ... its ... 8.33mil? is that a multiple of 1.33? ;-) --Calvin
Re: Getting a good trace.
2008-10-23 by calvingrier
. ... do ... Try KiCAD for schematic and layout. It s very intuitive for Win32 and Linux users. http://kicad.sourceforge.net
Re: Dry film- negative resist... First attempt failure
2008-10-22 by lcdpublishing
Thanks everyone, All great advice and information. I think the next smart step for me is to do an exposure test using transparency as opposed to vellum. Also
Re: Need hint on tonner transfer paper
2008-10-22 by fan_nastelroy
lets we talk about the cost in dollar, so we know the best and the cheapest one. I have data print glossy paper with good result for toner transfer, it cost
Re: [Homebrew_PCBs] Need hint on tonner transfer paper
2008-10-22 by Michel Baguet
I live in Belgium and the best I ve found until now is the Premium Plus HP Photo Paper higi-gloss for inkjet. It s more expensive than any other paper but it
Re: [Homebrew_PCBs] Need hint on tonner transfer paper
2008-10-22 by Stefan Trethan
There used to be some laser printers that used fuser oil (silicone oil) in the fuser unit. If someone ever tries to use one of those he would probably not
Re: Dry film- negative resist... First attempt failure
2008-10-22 by fan_nastelroy
... Adam is right, if you dilute in NaOH so your photoresist will pull away so fast, i develop my dry film photoresist with sodium carbonat with warm water too
Re: Need hint on tonner transfer paper
2008-10-22 by fan_nastelroy
... I have use Data Scan Glossy Photo Paper it is very good for toner transfer method. it leave thick surface above the toner, after ironing. so it can
Re: Dryfilm: positive and negative
2008-10-22 by fan_nastelroy
... I have 4 roll (one roll = 658feet) dry film photoresist from kolon, if you want i can give some feet for you, but it must not cheap for delivery cost, coz
Soldering help
2008-10-22 by Brian
If it is ok to post here, I would like to provide my soldering services. I am IPC-610 and J-standard quilified class 1,2 and 3. I am also trained in ESD
Re: Need hint on tonner transfer paper
2008-10-21 by Brian
... longer... ... another). ... If you use printed matter weither glossy or not wouldnt the ink from the picture or text also transfer? I have never tried it.
Re: [Homebrew_PCBs] Need hint on tonner transfer paper
2008-10-21 by Herbert E. Plett
6 minutes?? as soon the board has got temperature, no purpose of doing any longer... use any glossy paper like your mail store catalog... toner not sticking
Need hint on tonner transfer paper
2008-10-21 by Ernesto
Hi all!! I m trying to make some pcb s using the tonner transfer method. After ironing for about 6 minutes, the paper isn t completely glued on the board. The
Re: Dryfilm: positive and negative
2008-10-21 by warrenbrayshaw
... www.pcbhobbyist.com http://www.warapcb.com/dryfilm.php
Dryfilm: positive and negative
2008-10-21 by reneske
Hi I need some positive and negative dryfilm and want to know where I can buy it, and what type you can recomend. The size I need would be about 12 inch wide
Re: [Homebrew_PCBs] Re: Dry film- negative resist... First attempt failure
2008-10-21 by Adam Seychell
... It would almost be impossible to develop with NaOH because even tiny amount will shoot pH too high. All negative dry film I ve come across have specified a
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-21 by Adam Seychell
... If you ve never done exposures and this was your first PCB then it would be almost guarantee a failure. Normally, a calibration step is made to determine
Re: Dry film- negative resist... First attempt failure
2008-10-21 by javaguy11111
... If you are using washing soda for the developer you should not have any problems with losing exposed traces because it is too strong. If you are trying to
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by DJ Delorie
... True, but a step gauge tells you the *desired* exposure, not just something that works . They re pretty cheap too.
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by leon Heller
... From: Harvey White To: Sent: Monday, October 20, 2008 8:05 PM Subject: Re: [Homebrew_PCBs] Dry
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by Harvey White
... Negative resist? I m familiar with the positive resist on precoated boards. ... probably not. For the positive resist it s about 10:1 water to developer.
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by kabowers@NorthState.net
... Patience and thinking backwards can replace a step gauge while using a single board. Apply the resist, then mark the board into seven sections. Use a piece
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by DJ Delorie
... I agree this sounds like underexposure. If you don t have a step gauge, you can sort of calibrate your exposure by making a lot of small boards (like 1
Re: [Homebrew_PCBs] Dry film- negative resist... First attempt failure
2008-10-20 by Michel Baguet
With a negative film, this sounds more like under-exposure. Have you tried increasing exposure time ? ... From: lcdpublishing
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by DJ Delorie
... Edit the picture to be some other color than black, like bright blue. Then it will print with the color cartridges. However, find and read my previous
Dry film- negative resist... First attempt failure
2008-10-20 by lcdpublishing
Hi guys, I tried my first photo process board this weekend and the process failed completely. I am using the dry film, negative resist from MG chemicals. The
laser on presensitized
2008-10-20 by Cristian
Cheap UV 100mW cw lasers (BluRay) on eBay. It emits on 405nm, but some presensitized pcb (like Bungard s/Germany) responds to that light. Good to replace the
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by leon Heller
... From: pixelcanvas To: Sent: Monday, October 20, 2008 8:13 AM Subject: [Homebrew_PCBs] Re: Dry
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by Adam Seychell
... Its not solder mask because the PCB lacquer can easily be soldered through. Solder mask is a type of heat resistant 2 part cured epoxy. ... That inkjet
Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by pixelcanvas
... For printing I set the colours as full CMYK so it wouldn t be just black ink, however I´m afraid that my printer doesn t let me use any other cartridges
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by DJ Delorie
... I m using an Epson with Claria inks, but on specially treated films designed for this use. Look for Jetstar or Silkjet films (I got mine from vpcinc.com),
Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by pixelcanvas
... I m using an Epson printer with original DURABrite Ultra ink. The tranfarency film is some odd brand I found locally, looks like an ordinary acetate sheet
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by DJ Delorie
... I m putting about 3-5 times the usual amount of ink down for my films, and don t have your type of problem. What ink and film are you using?
Re: Dry film woes, maybe the developer is at fault?
2008-10-20 by pixelcanvas
Adam, by pressure pack of solderable PCB you mean a spray can of solder mask? I ve been looking for that around here but so far I haven t found any. I ve seen
Re: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
2008-10-19 by Adam Seychell
... Invest in a pressure pack of solderable PCB lacquer . It makes rework a lot easier, my can is about 10+ years old and I still use it.. ... You should take
Re: [Homebrew_PCBs] Re: Toner Dusting your Silkscreen (an idea)
2008-10-19 by Myc Holmes
Warren, On a practical note, the SEARS ES powder works fine as a solder mask. the particle size is a bit larger than the toner powder. It is cheap and readily
Re: Dry film woes, maybe the developer is at fault?
2008-10-19 by pixelcanvas
I m starting to get good results out of this stuff. Here s a TQFP adapter board I made for an ATMega48.
Re: Toner Dusting your Silkscreen (an idea)
2008-10-19 by warrenbrayshaw
Myc That s good information. Colored toner is expensive but you can buy single bottles of refill toner. Still may exceed some budgets. I Googled for