Re: [Homebrew_PCBs] Re: Experimental method
2005-07-27 by Stefan Trethan
... They ship to Austria, which is well outside the US i d hope ;-) ST
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Re: Experimental method
2005-07-27 by hjf2k2
... here ... Well yeah it depends, for cheap parts maybe it will be better to just buy them here rather than paying a $50 - $80 fedex shipment, for some reason
[Homebrew_PCBs] Re: Experimental method
2005-07-27 by Robert Hedan
Ah yeah, you re a little further than Canada. I ve had no problems getting samples over here. Look, if you just can t get them to ship them to you, ask if
Re: Experimental method
2005-07-27 by hjf2k2
... I did a while ago and all they sent was the CD-ROM, apparently they don t ship outside the US. I ll try again anyway.
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-27 by Stefan Trethan
... you can order maxim samples online on their page, no hassle or anything. Just click on order samples on a product page. ST
Re: Experimental method
2005-07-26 by hjf2k2
... I asked Maxim for samples and printed literature and all they sent was a CD-ROM with the datasheets... Intersil sent my samples via fedex from hong kong,
Re: [Homebrew_PCBs] Re: Homebrew CNC questions
2005-07-26 by Alan King
... Well that works fine enough for the table part, and really not that hard to convert to X,Y from the polar. But even for that, after looking at it the rail
Re: black photoresist masters - darkening
2005-07-26 by Phil
Hmmm, I wonder if post toner transfer, exposing the PCB to these vapors would improve pinholing by causing the toner to flow a little. Worth a try on my next
Re: A CAD/CAM/CNC approach to case design/construction
2005-07-26 by lcdpublishing
... Will check that out. DO you have any suggestions for a spray-on protection? I would think a laquer would eat the film. ... Rats, current is too low for my
Re: Homebrew CNC questions
2005-07-26 by James Newton
... stepper ... wood. ... motor. At a ... bit ... probably ... Use two ... cock the ... have near ... linear ... for ... simple, I ve ... found one ...
Re: A CAD/CAM/CNC approach to case design/construction
2005-07-26 by derekhawkins
... It s thin 11 X 8.5 sheets of self-adhesive plastic film. You can get them for laser printers and copiers or for inkjet printers. Print on the sheet like
Re: A CAD/CAM/CNC approach to case design/construction
2005-07-26 by lcdpublishing
Hi Derek, Great pictorial! I have two questions... 1) What is this product and where to get it self adhesive film 2) I notice this is a servo control being
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Roy J. Tellason
... Yeah, but the Maxim replacement allows fewer external components...
A CAD/CAM/CNC approach to case design/construction
2005-07-26 by derekhawkins
Most of us are probably using CAD software to design our PCBs but if you re still scribing patterns for drilling and cutouts directly to metal during case
Re: [Homebrew_PCBs] Re: Homebrew CNC questions
2005-07-26 by Alan King
... Spring/solenoid can actually work quite well, PWM the solenoid against the spring and you have control, some things are done this way. But it s more work
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Stefan Trethan
... course it would be fine if it works, what i mean is it might be easier to print a non-photosensitive ink. UV curing ink might well be the solution, i
Re: [Homebrew_PCBs] black photoresist masters - darkening
2005-07-26 by Zoran A. Scepanovic
Hello Leon, Monday, July 25, 2005, 4:48:51 PM, you wrote: LH ----- Original Message ----- LH From: hjf2k2 LH To:
Re: Homebrew CNC questions
2005-07-26 by hjf2k2
... break the tools. ... Well, yea, guessing I get the parameters of the board and the bits, which I won t, because the board, I don t know the material, and
Re: Homebrew CNC questions
2005-07-26 by lcdpublishing
... would ... a .010 ... strength. ... for ... there ... it ... either, ... While similar methods have been used on drilling machines WAY BACK in time, they
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Thomas
... if it works, who cares ! UDC2 & UDC3 is good for a solder mask so it says http://www.ink4u.ca/emulsions.htm then maybe its good enough to protect the
Re: Homebrew CNC questions
2005-07-26 by hjf2k2
... Why? If I compress the spring a little more, I ll have more strength. Or so I think. So I can put a screw to adjust the spring tension for the different
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Mycroft2152
Stephan, As I said in a previous post, the photosensitivity of the ink can be used to crosslink the compound to the copper. This may alleviate the
Re: Homebrew CNC questions
2005-07-26 by lcdpublishing
... Bad idea, You will have no control over the force - with a spring, you would simply get a single feedrate for everything. Believe me, a .010 diameter
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Stefan Trethan
... As i have said before, inkjet printig photosensitive ink is doing double the work. Why would you need photosensitive ink when it is already printed in the
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-26 by Thomas
Gents just a thought, could this stuff be diluted enough for use in a inkjet printer then printing direct onto the copper board .... my old canon 200spx is
[Homebrew_PCBs] Re: Experimental method
2005-07-26 by Robert Hedan
BTW, you know about the ICL7107 right? It s a 40-pin IC with all you need to drive a 3 1/2 digit 7-seg led display, exactly like cheap testers.
Homebrew CNC questions
2005-07-26 by hjf2k2
Hi everyone, it s me again. I m starting to work on a homebrew CNC machine project. My question is about the motors. I know I need a stepper motor, but what
Re: Experimental method
2005-07-26 by hjf2k2
... another ... shunt. http://www.tpub.com/content/neets/14175/css/14175_33.htm That s how those cheap digital testers work, if you crack one open you ll find
Re: [Homebrew_PCBs] Re: black photoresist masters - darkening
2005-07-26 by Leon Heller
... From: Stefan Trethan To: Sent: Monday, July 25, 2005 10:04 PM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Rubbing alcohol
2005-07-26 by Earl T. Hackett, Jr.
70% IPA is often sold as rubbing alcohol and may contain a bit of lubricant oil. That will wipe out toner adhesion. Read the ingredients. Anything besides
Re: Experimental method
2005-07-26 by bob_ledoux
I m impressed with the sponge technique. I can etch a 4x5 inch board in 10 minutes using about 2 ounces of FeCl. I learned to leave large areas of toner
[Homebrew_PCBs] Rubbing alcohol
2005-07-26 by Robert Hedan
What s the difference between 70% and 99% isopropyl alcohol? I uesd 70% yesterday (cause I didn t have 99%) and I m wondering if it left an undesired deposit,
[Homebrew_PCBs] Re: Experimental method
2005-07-26 by Robert Hedan
I did run it through a second time with an unused bit of foil, and it still did not stick perfectly ; same place, same pattern. That s why I am suspecting
Re: black photoresist masters - darkening
2005-07-25 by hjf2k2
... the answer was directed to me, and I don t live in the US.
Re: Experimental method
2005-07-25 by bob_ledoux
The Pulsar Green Foil is great to allow sponging on the etchant--no tanks needed. If it doesn t stick properly the first time, run it through the laminator
Re: [Homebrew_PCBs] Re: black photoresist masters - darkening
2005-07-25 by Stefan Trethan
What is happening there, the fumes solving the toner making it flow? any ideas? ST
Re: black photoresist masters - darkening
2005-07-25 by derekhawkins
... It s very, very easy to get in the US, but I see your point. However, depending on thinner, it may also have other ingredients that will dissolve or
Re: [Homebrew_PCBs] Re: black photoresist masters - darkening
2005-07-25 by Leon Heller
... From: derekhawkins To: Sent: Monday, July 25, 2005 8:56 PM Subject: [Homebrew_PCBs] Re: black
Re: [Homebrew_PCBs] Re: black photoresist masters - darkening
2005-07-25 by Leon Heller
... From: derekhawkins To: Sent: Monday, July 25, 2005 8:18 PM Subject: [Homebrew_PCBs] Re: black
Re: black photoresist masters - darkening
2005-07-25 by hjf2k2
... No, I m not in the US. If I get some of the product, I ll try that, thanks for the info!
Re: black photoresist masters - darkening
2005-07-25 by derekhawkins
... Homedepot sells it if you live in the US. If not, it is also called xylene or dimethyl benzene. ... Pour to about a 1/2 level in a container with mouth
Re: [Homebrew_PCBs] Experimental method-jamming
2005-07-25 by Roy J. Tellason
... Realize that those of us who get this (and other yahoo lists) by direct email instead of through the web interface don t see any message numbers...
Re: black photoresist masters - darkening
2005-07-25 by hjf2k2
I ll see if I can get some Xylol. What s the procedure for vaporizing then?
Re: black photoresist masters - darkening
2005-07-25 by derekhawkins
... Vellum lets the light through too. In other words the fogging negates the gains from using transparencies in the first place. You can get the darkened
Re: Experimental method
2005-07-25 by hjf2k2
... I just called the manufacturer, they told me to use distilled water, 20% will reduce the viscosity to 50%. Maybe enough for an airbrush.
Re: black photoresist masters - darkening
2005-07-25 by hjf2k2
... No, it was a Spanish brand, abezeta . I wouldn t mind about the fogging, as long as it lets the light through.
PCB EDM -- further thoughts
2005-07-25 by curt_rxr
Hi All, While I m working on my new setup ( one piece bed and tank made of plate glass with roller blade bearings, Garden of EDM power supply with a PIC
Re: [Homebrew_PCBs] Re: Experimental method
2005-07-25 by Stefan Trethan
... I m sure you can dilute it, and then maybe you can spray it? Ask the manufacturer which solvent they use, or try yourself, acetone surely works, maybe
Re: black photoresist masters - darkening
2005-07-25 by derekhawkins
... Was this Laser Buddy by any chance? While it darkens the print, I find it fogs up the transparency somewhat. A respirator with organic vapor cartridges
Re: [Homebrew_PCBs] black photoresist masters - darkening
2005-07-25 by Leon Heller
... From: hjf2k2 To: Sent: Monday, July 25, 2005 3:42 PM Subject: [Homebrew_PCBs] black photoresist