Re: [Homebrew_PCBs] Re: Photolithography - resolution
2006-02-24 by Vlad Krupin
FWIW, Recently I noticed that the toner in my laserjet printer is probably running low, so the images are not as dark as they used to be a few years ago. I
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Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-24 by Leon Heller
... From: Stefan Trethan To: Sent: Friday, February 24, 2006 4:59 PM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-24 by Leon Heller
... From: alan00463 To: Sent: Friday, February 24, 2006 4:07 PM Subject: [Homebrew_PCBs] Re: Board
PIC Simulator - Was- Anyone try this program to simulate circuits?
2006-02-24 by kilocycles
If anyone does need a PIC Simulator, check out http://www.oshonsoft.com/pic.html . I bought the PIC IDE/compiler a few years back when the total product cost
Re: Photolithography - resolution
2006-02-24 by Radra
Have you had the opportunity to examine your artwork transparency (mask) using a microscope? I wonder if it is better than mine. Wish I had some way to take
Re: Board cleaning trials
2006-02-24 by lcdpublishing
Could be a collector of historical pennies? ... rinse ... it
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-24 by Stefan Trethan
... Ok, what i don t get here, why are you cleaning pennies? I mean, it doesn t really matter if they are dirty when you spend them, right? What am i missing
Re: Board cleaning trials
2006-02-24 by alan00463
No need to buy a fancy cleaner. I used to clean pennies in a mixture of vinegar and salt. The proportions make little difference. The solution strips
[Homebrew_PCBs] paging Cliff Ward - email bounces
2006-02-24 by Stefan Trethan
Cliff, emails to you seem to bounce recently. Contact me with another address. ST
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-24 by Leon Heller
... From: Bill Maxwell To: Sent: Friday, February 24, 2006 11:26 AM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-24 by Bill Maxwell
Anybody tried Coca Cola? we used to clean the old aussie pennies with it and they had a reasonably high copper content. Bill ... From: klmjr22
Re: [Homebrew_PCBs] Success using Press-n-Peel and H202 HCL etch solution (First Attempt)
2006-02-24 by Leon Heller
... From: sbdwag To: Sent: Friday, February 24, 2006 2:46 AM Subject: [Homebrew_PCBs] Success using
Re: Anyone try this program to simulate circuits?
2006-02-24 by soffee83
Man, not off to a very good start on this one. Spit about three different confusing error boxes at me on start, but eventually opened, then just poofed on me
Re: Success using Press-n-Peel and H202 HCL etch solution (First Attempt)
2006-02-24 by John Popelish
... Commercial layout programs have a pad with 1 to 4 very short radial traces connecting it across a larger hole. This is called a thermal or thermal
Success using Press-n-Peel and H202 HCL etch solution (First Attempt)
2006-02-24 by sbdwag
Enclosed below a photo of my first attemp at etching. http://www.wagsterstuff.com/photos/pnpsuccess.jpg Some observations Used a 3m 320grit scouring pad to
Re: [Homebrew_PCBs] Anyone try this program to simulate circuits?
2006-02-24 by Jan Kok
Haven t tried it, but $39 for the personal version ain t bad. It seems to include some PIC emulators, which takes it a step beyond typical SPICE programs. If
Re: [Homebrew_PCBs] Re: Photolithography - resolution
2006-02-23 by Russell Shaw
... Me too, but i ve been doing more CPU stuff than RF lately. ... You ll need to know the collimation characteristics of the light-source and the thickness of
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by Wayne Topa
... Way to go Keith! Lime Away would seem to be something to try. Aqua Mix Sulfamic Acid Crystals would seem, to me, to be a bit of overkill. I d have to
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by Stefan Trethan
On Thu, 23 Feb 2006 21:56:23 +0100, klmjr22 ... and may get you a nice cancer too for all your troubles... ST
Re: Board cleaning trials
2006-02-23 by klmjr22
... I looked at the Household products database and found tarn-x is 3-5 sulfamic acid but also contains Thiourea which may help cleaning.I found that Lime Away
Anyone try this program to simulate circuits?
2006-02-23 by Keith Applegarth
http://www.virtualbreadboard.com/ There is a freeware version and it is also reasonably priced. Keith
Re: [Homebrew_PCBs] Re: Photolithography - resolution
2006-02-23 by Stefan Trethan
... One dot of the average 1200DPI printer is about 1 mil, so it is not surprising it doesn t form a good line one dot wide. You already know what you can
Re: Photolithography - resolution
2006-02-23 by Richard
I think that the really fine-line stuff is made by copper deposition, not etching. Leon yes, it s called the additive process . (as opposed to
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by lists
In article , ... I know, that s why I rarely touch the stuff :-)
Re: [Homebrew_PCBs] Re: Photolithography - resolution
2006-02-23 by Leon Heller
... From: Radra To: Sent: Thursday, February 23, 2006 5:22 PM Subject: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by Wayne Topa
... Just found that we had 2 Scrub Free cleaners under the sink. Neither has sulfamic acid listed on the label, Tilex and one called Scrub Free. Took a 6 x
Re: Photolithography - resolution
2006-02-23 by Radra
The purpose of my original post was to query the group regarding resolution limitations of the photolithography process. My attempts to fabricate a useable 1
Re: Board cleaning trials
2006-02-23 by Mike Phillips
Wyane, I ve been dying to try a copper cleaner like you did. It s sounds like a great solution. Thanks for reporting the results. Mike ... laminated
Re: Board cleaning trials
2006-02-23 by bob_ledoux
I ve had 100% success with this process even with very tarnished boards: 1, Clean with Tarn-X 2. Scrub, both directions,under water, with 400 grit wet or dry
Re: [Homebrew_PCBs] Re: Re: Photolithography - resolution
2006-02-23 by Stefan Trethan
On Thu, 23 Feb 2006 11:20:33 +0100, Leon Heller ... Maybe. Much finer etching wouldn t be a huge problem, it s done with ICs (they can steer the etching
Re: [Homebrew_PCBs] Re: Re: Photolithography - resolution
2006-02-23 by Leon Heller
... From: Stefan Trethan To: Sent: Thursday, February 23, 2006 10:15 AM Subject: Re: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Re: Photolithography - resolution
2006-02-23 by Stefan Trethan
... Yea sure, making 1mil traces, that s 25um wide, a typical pcb has 35u of copper thickness. So anyone telling me he is making PCBs with traces that are
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by Stefan Trethan
... Just make sure it is oil-free air ;-) I haven t found the microetch necessary for 100% reliable transfers, but it sure is a way to exclude cleaning errors
Re: Re: Photolithography - resolution
2006-02-23 by Richard
Lyman, congrats on your first photo-board. You didn t say what your exposure tool was; but at the 1-mil level, you may well be running into effects of poor
Re: Board cleaning trials
2006-02-23 by Richard
fwiw, here is the cleaning procedure that I have used successfully for over 20 years... 1) Scrub board with the scour-side of 3M kitchen-sponge and liquid
Re: [Homebrew_PCBs] Re: Photolithography - resolution
2006-02-23 by Leon Heller
... From: Radra To: Sent: Thursday, February 23, 2006 5:47 AM Subject: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Safe CuCl etchant storage?
2006-02-23 by Stefan Trethan
... The H2O2 mixed with acid and metal traces will decompose anyway, which is why you mustn t have a tightly closing lid or the bottle can explode. Back in the
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-23 by Leon Heller
... From: soffee83 To: Sent: Thursday, February 23, 2006 3:02 AM Subject: [Homebrew_PCBs] Re: Board
Re: [Homebrew_PCBs] Re: Safe CuCl etchant storage?
2006-02-23 by Stefan Trethan
It would be much easier, and probably safer, to leave the etchant in the etching tank. ST
Re: Board cleaning trials
2006-02-23 by wbblair3
... Don t ask me how I discovered this (I don t remember), but the commonly available (in the US anyway) Scrub Free soap scum remover intended for cleaning
Re: Photolithography - resolution
2006-02-23 by Radra
Just fabricated my first PCB today using the photolithography method; prior PCBs were made using the toner-transfer method. My 10 to 15 mil tracks were
Re: Photolithography - glass
2006-02-23 by Radra
The UV wavelenghts commonly used for photolithography are known as long-wave UV and are typically in the range of about 360 to 375 nm. Most glasses and many
Re: Board cleaning trials
2006-02-23 by soffee83
I wonder what a watered down , wiped on mix of the actual etchants would do in that regard? I ve also wondered at times, just how much effect the texture of
Re: Safe CuCl etchant storage?
2006-02-23 by wbblair3
... [edit] ... [edit] ... Stephan, A post full of valuable information and great ideas, as usual. Per your ideas, I m going to store my pre-mixed etchant
Re: Safe CuCl etchant storage?
2006-02-23 by wbblair3
... I just checked and my plastic milk containers are recycle #2 (HDPE). The bottle my FeCl3 came in is also marked #2. HOWEVER, it has _much_ thicker walls
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-22 by Leon Heller
... From: lists To: Sent: Wednesday, February 22, 2006 9:44 PM Subject: Re:
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-22 by Wayne Topa
... I will add a 91% isporopyl to the list for my next board. Thanks! Wayne
Re: [Homebrew_PCBs] Re: Board cleaning trials
2006-02-22 by lists
In article , ... Have you tried Coca-cola? You can yet that pretty well anywhere. It s the Phosphoric acid content that does the
Re: Board cleaning trials
2006-02-22 by protonceksleeperman
... tried ... will ... for ... demonstrates its ... I agree about that character...grrrr....but, i ve had a piece of old board with very oxidized copper and it
Re: [Homebrew_PCBs] Safe CuCl etchant storage?
2006-02-22 by Stefan Trethan
Easy - whatever you use store and use it inside a large deep plastic tray of sorts. You might use something like a cat litter box (lion size would be preferred