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I don't know if you want this around if you have kids, but MG Chemicals makes "Liquid Tin" -- which plates in 5 minutes. The contents are nasty -- fluoroboric acid and stannous fluoroborate. Allied Electronics sells it, but not that they will ship all chemicals separately and you pay a UPS surcharge for Hazmat. It's expensive at $27 for 17 ounces.

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File : /Making Plated Through Holes at Home Uploaded by : alienrelics <alienrelics@...> Description : By Adam Seychell You can access this file at the URL http://groups.yahoo.com/group/Homebrew_PCBs/files/Making%20Plated%20Through%20Holes%20at%20Home To learn more about file sharing for your group, please visit http://help.yahoo.com/help/us/groups/files Regards, alienrelics <alienrelics@...>

I need to draw some schematics of my circuits, but I do not have any software. Any recommendations on free or inexpensive software for this? The simpler the better. TIA, Dave The Inexpensive Seismometer Project http://www.infiltec.com/seismo/ Yukon Gold Prospecting http://www.infiltec.com/gold/yukon/ http://www.infiltec.com/

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File : /Homemade PCB equipment/Dscn0329.jpg Uploaded by : alienrelics <alienrelics@...> Description : Home-Brew PET-ctrl. PCB-drill by Janwrl You can access this file at the URL http://groups.yahoo.com/group/Homebrew_PCBs/files/Homemade%20PCB%20equipment/Dscn0329.jpg To learn more about file sharing for your group, please visit http://help.yahoo.com/help/us/groups/files Regards, alienrelics <alienrelics@...>

Hi , i am Eduardo , and i make a pcb plotter , see it at : http://www.geocities.com/pancary

Em branco Quem quiser o programa para controle da Plotter pode baixar em : Home Build Plotter Driver Download : http://www.geocities.com/pancary/plotter.zip

This from Yahoo: Dear Yahoo! Groups Members, The Yahoo! Groups service will be down Friday March 15 9:00 PM PST (GMT-8) as we move our servers to a new facility. We expect the service to be back up the morning of Sunday March 17. During this time the web site will be unavailable and email will not be delivered. (Some users may experience email non-delivery notices, but all email should be delivered once service has resumed.) Please note: once the service is back up, there will be email delays due to backlog. We expect these delays to last no longer than 1 day. Please do not re-send email to your group as it will only add to delays. We apologize for any inconvenience this may cause. The Yahoo! Groups Team It means just what it says, so please be advised! Steve Greenfield __________________________________________________ Do You Yahoo!? Yahoo! Sports - live college hoops coverage http://sports.yahoo.com/

Em branco I forgot this dll , win95io.dll to run printer port , only 1kb. http://www.geocities.com/pancary/win95io.zip

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File : /How_to_solder_1.pdf Uploaded by : alienrelics <alienrelics@...> Description : How To Solder- one page PDF file You can access this file at the URL http://groups.yahoo.com/group/Homebrew_PCBs/files/How_to_solder_1.pdf To learn more about file sharing for your group, please visit http://help.yahoo.com/help/us/groups/files Regards, alienrelics <alienrelics@...>

Found a cool link- how to build a $20 hot air pen for soldering surface mount! http://groups.yahoo.com/group/Homebrew_PCBs/links/Soldering_tips_00100 7679854/ Here's the Rat Shack $10 desoldering pen he mentions: http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category% 5Fname=CTLG%5F005%5F006%5F003%5F000&product%5Fid=64%2D2060 I'm off to Rat Shack! Steve Greenfield

Many peole have built my stepper motor drivers. I posted all schematics and artwork for free... Best Regards Hans W

http://hans-w.com/modular.htm

Does anyone know of an effective and reasonably priced software program to convert Gerber and drill files to DXF? Thanks for any shove in the right direction, Denny

Hi, You can mill circuit boards using a homemade machine and a Dremel type tool. I use a Dremel set on number 3. My feed rate is 6" per minute. I have a picture at: http://www.geocities.com/crankorgan/mill.htm Of a board milled by my machine. Any Questions, I will answer here in this conference. John

Hello Everyone, Recently, Yahoo has change it's policy on sharing user information with third parties. How does this effect us? They will provide your information to Telemarketers, Bulk mailers and Spammers. If you have created a user profile with Yahoo you should go to it and make any changes to your "Marketing Preferences" you feel necessary. I personally changed all the "Yes" boxes to "No". Here's what you need to do: Go to My Groups http://groups.yahoo.com/mygroups and verify your password if it asks you to, click on Account Info (at the top of the page), and verify your password if it asks you to again, and your Yahoo ID card comes up. Click on 'Edit your Marketing Preferences' (middle of the page under your email address) and change all those Yes's to No's! Make sure you also scroll to the bottom of the page and change the Telemarketing and Bulk Mailing options as well. Click Save Changes and Exit Steve, the moderator __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://http://taxes.yahoo.com/

There was a company in West Hartford CT which was pioneering a piezo ink-jet head with extremely fine "resolution" -- Accent Color Sciences (now bankrupt). There were a couple patents filed by them in 1999 and 2000 which describe the remarkable resolution of the print head. Look under assignee name (AN/Accent) field in the advanced search engine at the www.uspto.gov While there was a lot of interest from some of the cell phone manufactures, (if you wanted, you could change circuitry on the fly) the economy took its toll.

--- johnman9146 <johnman@...> wrote: > I have been reading more and more about a certain kind of etch > resist > pen that uses a laquer based ink. Perhaps I will try some type > of > laquer paint/ink. > > I am also considering the photoresist method as it sounds like > this > is the method of choice here. Please check out the bookmarks section. I went to a lot of trouble to organize it. There are links there for all kinds of methods, and as far as etch resist pens there are pens -much- better than those lame laundry marking pens that are sold as etch resist pens. Steve, moderator feeling unappreciated __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/

Hi. What if, you took a surplus plotter. Put a sensitized board on the plotter in a dark room. Replaced the pen with a focused light source that turned on and off with the pen-up and pen-down signal. I used to do Radio FAX pictures like this until I found that metalized paper that burned when a current went through it. John

like the HP7475a which I own, I've written some code to also use it as an XY pen-plotter.

I am new to this group and I have been tinkering around with making hobby PC boards for a couple of years now (I am no pro nor do I claim to be). I have tried several iron-on toner transfer systems and don't like them much. The best system (using this method) that I have found is using the press-n-peel blue sheets and using a Dry-Mount Press (Older photographic item used to mount old style non-coated paper to matte board). This method is the best I have tried so far.... However, I am considering attempting to use a sort of silk screen method to create PCB etch resists, but I am wondering if anyone knows of a cost effective ink or paint that can be used as etch resist. I believe some sort of fabric ink may hold up using this method. Does anyone know what material should be used for that green soldermask like what is found on commercial PCBs? I am looking to make my projects a little more professional looking. I appreciate any constructive criticism or help on this topic. Thanks