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2014-05-11 by Boman33
That should work fine. Just do not have any runners next to the edge. I have used 10mil and thinner FR4 making PCB that were 3 x 3mm. I laser cut the PCB for
2014-05-11 by Brad Thompson
On 5/10/2014 8:31 PM, Peter Johansson rockets4kids@gmail.com ... Hello-- If your board has a ground plane (i.e., is two-sided) and is made of thin stock, the
2014-05-11 by Peter Johansson
I have a project idea that would require hundreds (possibly thousands) of very small PCBs, each one being a circle approx. 1/2 inch in diameter. Does anyone
2014-05-09 by Brad Thompson
Hello-- Below you ll find a couple of postings (originally made to the Glowbugs and QRP-L newsgroups) regarding the possible use of 3-D printing methods as a
2014-05-08 by Mitch Davis
... Flux is the key to soldering chips. And you can find lots of good SMT soldering videos on youtube. ... 1206s or 0805s are a good size to start with.
2014-05-08 by <cs6061@...>
Kieth, Soldering smt parts is not all that hard, it helps to have a zoom binocular microscope, a steady hand, a good soldering iron and fine solder with a
2014-05-08 by Mitch Davis
... Mr. PCB Shopper kindly contacted me but I declined. The site seems to optimise for price. My strength is to offer first-rate service above all, while
2014-05-08 by Harvey White
... Yer welcome..... ... Good idea in terms of money, I think. BGA stuff you want them to do, leaded flatpacks, you can do. ... Just as easy, in the long run.
2014-05-08 by James
In that case, there s a multitude of pcb fab houses that can churn out your PCB in small quantities, ranging from very high quality, to
2014-05-07 by <beefyzee@...>
Good Morning guys (I m in Australia), and first of all: THANK YOU VERY MUCH EVERYONE. I didn t expect such a great response. I ve now got a much better insight
2014-05-07 by Paul Alciatore
You need to contact some of the PCB assembly companies to get the exact details and, of course, prices. I have purchased bare boards in small quantities (up to
2014-05-07 by <cs6061@...>
Kieth, There are a lot of variants to the process. All the way from writing a speck of what the board does and its requred form factor and letting the
2014-05-07 by Boman33
One quick additional comment: If the products are for SMT boards and using Pick & Place machines for automatic assembly it is better to let the manufacturer
2014-05-07 by Harvey White
... As has been mentioned, either you do bare boards as a kit, or supply the parts to the board stuffer, or have them get the parts. ... That s what a company
2014-05-07 by Mitch Davis
Hello Folks, On Wed, May 7, 2014 at 4:06 PM, David Lyon ... I recognise most of those boards! David s been a prolific
2014-05-07 by David Lyon
Hi Steve, It s May 7 by my clock. Is that rule per calendar month? or every 30.5 days? As it might give different results. Regards David
2014-05-07 by <alienrelics@...>
Just so there is no confusion, here is the relevant excerpt from the list rules: Suggestions, recommendations and such, to and from professionals and
2014-05-07 by Tony Smith
I ve made a circuit board for myself which does something for my cnc plasma cutting table. There seems to be some sparks of interest for it but not at the cost
2014-05-07 by Boman33
Keith, Depending on your arrangement with the contract manufacture you can just send your current BOM and PCB layout. Typically the contract manufacturer will
2014-05-07 by David Lyon
Hello, If you have a look here - https://plus.google.com/u/0/+DavidLyon/posts There s a few more examples of hackvana pcb s.
2014-05-07 by Mitch Davis
Hello Keith, ... Are you talking about just the PCB, or getting someone to provide the boards and components and assemble them into a product for you? If
2014-05-07 by <beefyzee@...>
I ve made a circuit board for myself which does something for my cnc plasma cutting table. There seems to be some sparks of interest for it but not at the cost
2014-05-04 by <elson@...>
... Well, not playing with it at all. It has been one of the major tools in my shop for 18 years, and I need to keep it running, that s why I was worried the
2014-05-03 by <elson@...>
No, it would take a much more powerful laser at a shorter wavelength to print directly to the resist. And, this system requires the film be wrapped around a
2014-05-03 by <elson@...>
Well, this sort of mechanism has been used for image printing and scanning for a LONG time. Early weather FAX machines did this starting around WW-II, I
2014-05-03 by <elson@...>
... No, there is a classic phase locked loop using the 4044 phase detector, but the oscillator is a DC motor turning an encoder. So, the 4044 feeds an
2014-05-01 by <cs6061@...>
John, Glad you are still playing with it, I remember when you did the first posts. A photo plotter is still on my to do list of projects. I managed t
2014-05-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
2014-05-01 by Malcolm Parker-Lisberg
Funny how the original Edison Bell phonograph gets updated and changed from sound recording to light recording. Malcolm I don t suffer from insanity I enjoy
2014-05-01 by Boman33
I remember your laser plotter from you original posting. A great project! From: elson@pico-systems.com Sent: Wednesday, April 30, 2014 23:21 Well, I finally
2014-05-01 by Jeff Heiss
Have you tried printing directly to photoresist? Are there pictures of the results? Jeff From: Homebrew_PCBs@yahoogroups.com
2014-05-01 by <elson@...>
Well, I finally got around to updating the laser photoplotter I built in 1996. it was still running on the creaky Cyrix-CPU ISA-bus PC with a DMA card. I was
2014-04-23 by <indigo_red@...>
Hi Mark, I found the Alcohol dries leaving more water vapor( maybe from cooling more during evaporation or it s water content?). The Acetone removes the
2014-04-22 by Mark Lerman
Have to check my notes, but I think acetone works well, but isopropyl alcohol does not. At 07:18 PM 4/21/2014, you wrote: Hi Mark, Very interesting!!! I ll
2014-04-21 by <indigo_red@...>
Hi Mark, Very interesting!!! I ll try that too. Gnd the pcb etc. Also wipe down the PCB with acetone and let dry( ~ a minute or less ) prior to running it in
2014-04-21 by <cs6061@...>
Rob, The last real development I have seen was by Volkan a few years back. It s on my list of projects but currently no time to work on it. The project has
2014-04-21 by Mark Lerman
The thing that seems to work best is disconnecting the transfer voltage from the transfer roller and then grounding the surface of the pcb. This can be done
2014-04-20 by Jean-Paul Louis
Rob, Do you mean Direct Laser Printing on a copper plate (conductive) like a PCB? I though the laser printing needed an insulator to deposit toner on. I might
2014-04-20 by Rob Frohne
Greetings, I m wondering if anyone has done any more work on direct laser printing. I would like to improve our process, because sometimes, especially on
2014-04-16 by Heather Magill
Ok, third time replying might be the charm so.... I m a metalsmith and often galvanic etch copper (20 or 22 gauge) bigger than my iron (6 x4 ). I use the
2014-04-15 by Peter Johansson
... transfer. They also sell a ready refilled cartridge at about 1/2 the OEM price. Good to know. I lowballed a make offer on ebay and picked up an OEM cart
2014-04-15 by <bebx2000@...>
I have used and am very satisfied with, http://www.tonerrefillkits.com/ For the first refill you need the toner and the recharge kit. I have re-charged
2014-04-15 by Harvey White
... I ve had etch times in the 5 to 6 minutes range, but that was bubbling fresh H2O2 and heating the solution during the summer. No wonder. Never was quite
2014-04-15 by <soffee83@...>
Thanks Harvey, That time estimate was a slight exaggeration, but it probably wasn t a lot more (maybe 5min or so tops). I m also usually doing smaller sized
2014-04-14 by Peter Johansson
I recently dug out my old laser printer (what little printing I do is on the family inkjet) and discovered I am low on toner to the point where I cannot get
2014-04-14 by Boman33
And if that is not enough test lines there is: http://www.vinland.com/USAF-1951.html It includes slightly offset lines which is the worst case condition.
2014-04-14 by Harvey White
... That s too fast, you don t get enough control. The reaction is essentially an oxidization of copper, so the more oxygen (and warmer the solution) the
2014-04-14 by <soffee83@...>
H2O2 can degrade with temperature and time. - I wondered about that shelf life thing, but didn t know if my acid was the one that had gone bad. The past few
2014-04-14 by DJ Delorie
... I have more if you need them: http://www.delorie.com/pcb/spirals/ http://www.delorie.com/pcb/bloat.gbr
2014-04-14 by James
I rebuilt my UV box with 9 rows of 12 leds covering an A4 area, I had to use a diffuser in the end otherwise because of the fairly wide spacing the led