Re: [Homebrew_PCBs] Re: Danger of Chemical Exposure.
2016-02-02 by Bruce Parham
Not quite: Denatured alcohol From Wikipedia, the free encyclopedia *Denatured alcohol*, also called *methylated spirits*, is ethanol
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Re: [Homebrew_PCBs] Re: Danger of Chemical Exposure.
2016-02-02 by Priyank Garg
Hi all, Please read the wikipedia article on acetone. It is only slightly toxic (even produced in our body) and has very high ignition initiation energy( so
Re: [Homebrew_PCBs] Re: Danger of Chemical Exposure.
2016-02-02 by camillus
AMEN! On 2/2/2016 9:43:10 AM, rolohar@comcast.net [Homebrew_PCBs] wrote: To All: With All Due Respect ............. Enough
Re: Danger of Chemical Exposure.
2016-02-02 by alan00463@...
I forgot to mention that denatured alcohol AKA methanol is a toxin. Therefore, its vessel or any vessel containing it and something else, acetone, for example,
Re: Danger of Chemical Exposure.
2016-02-02 by alan00463@...
Explosions versus exposure ? Both are potentially damaging. Both warrant caution. I think explosion can be prevented by keeping the volatile chemicals in
Re: [Homebrew_PCBs] Re: Danger of Chemical Exposure.
2016-02-02 by rolohar@...
To All: With All Due Respect ............. Enough with the chemical horror stories. Simply........If you have fear of using Top Care isopropyl alcohol (70%
Re: Danger of Chemical Exposure.
2016-02-02 by Tim Gibbs
I must echo the views of dangerous chemicals. A school friend was working on cleaning his motor bike engine. He was using a mixture of acetone, white spirit
Re: [Homebrew_PCBs] Re: Double sided registration
2016-02-02 by Bob Butcher
I think the main reason folks want to find an alternative method is that some laser printers, such as Brother, seem to not work well for the laminator method.
RE: [Homebrew_PCBs] Chemical Exposure.
2016-02-02 by Boman33
Thanks Tony. This is significant since I and presumably many others have a bottle of to be disposed of chemicals. Hydrogen peroxide, hydrochloric acid and
RE: [Homebrew_PCBs] Chemical Exposure.
2016-02-02 by Tony Smith
I think the danger was more that if you forget to put the lid on or spill some, that may wind up causing an explosion the ruins your day. So I googled
Re: [Homebrew_PCBs] Chemical Exposure.
2016-02-02 by Stefan Trethan
Hey I m all for chemical safety, and I m just an electronics guy, but my understanding was that acetone is pretty safe. It isn t carcinogenic like many of the
RE: [Homebrew_PCBs] Chemical Exposure.
2016-02-02 by K5ESS
The best source for understanding the hazards associated with various chemicals is the Material Safety Data Sheet (MSDS) for the material. These are based on
Re: [Homebrew_PCBs] Chemical Exposure.
2016-02-02 by Will
If you live on cold & dry enough climate you can do same thing with hot water. Though some times it comes down as little solid bits. Cheers, Will
Re: [Homebrew_PCBs] Chemical Exposure.
2016-02-01 by DJ Delorie
keith printy keethpr@ameritech.net [Homebrew_PCBs] ... You shouldn t have said that - now I want to try it :-)
Re: [Homebrew_PCBs] Chemical Exposure.
2016-02-01 by Brad Thompson
... Hello-- As a young wiseguy radio/TV repair tech, I asked the shop manager why we were using methanol to clean pots and switches instead of carbon
RE: [Homebrew_PCBs] Chemical Exposure.
2016-02-01 by keith printy
We all know how flammable gasoline is , there is a scale rating what is most flammable , with 1 being the most and 10 being the least. Gasoline comes in at
Chemical Exposure.
2016-02-01 by AncelB
I did chemistry up to tertiary level and my father was a Canadian trained chemist...He is now blind in one eye and cannot smell AT ALL due to constant exposure
File - monthly.txt
2016-02-01 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
Re: [Homebrew_PCBs] homemade four layer boards
2016-02-01 by DJ Delorie
... I did it once to see if I could. I could. It s generally not worth the effort though, and the vias were a nightmare.
Re: [Homebrew_PCBs] Double sided registration
2016-01-31 by Harvey White
... I may try cold transfer one of these days, but I prefer to minimize my exposure to the chemicals. I can do a decent 10/10 with hot transfer. Registration
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by rolohar@...
Andrew Volk: Brayer Thanks for the correct name. I made mine with a piece of neoprene tubing and a piece of bent round aluminum. Knowing the real name of the
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by rolohar@...
Andrew and All: Just make sure that the solvent (acetone, xylene, etc) that you are using in your cold transfer process is not something that will attack any
Re: [Homebrew_PCBs] Double sided registration
2016-01-31 by Bill Verstelle
I guess it s what ever works for you. I can t get the cold method to work at all and I have a headache by the time I m done trying, these chemicals are not
Re: [Homebrew_PCBs] Double sided registration
2016-01-31 by Jean-Paul Louis
Harvey, Why would you even bother to try hot transfer when you master the cold transfer? To me, what Duwayne has accomplished is a HUGE IMPROVEMENT. I will not
Re: [Homebrew_PCBs] Re: Double sided registration
2016-01-31 by Harvey White
... Brother has been known to have higher temperature melting point toners. This could be a difficulty. Cold method bypasses that, of course. If you go to
Re: Double sided registration
2016-01-31 by duwaynes@...
Probably due to the unmodified laminator I used. I had to run the board through 5 or 6 times to get good transfer to the board. Even with rotating the board
Re: Double sided registration
2016-01-31 by AncelB
Can t say I understand why hot transfer gave u registration probs unless you did separate passes for each side. I hot transfer both sides at once so there are
RE: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by Andrew Volk
Look for a “brayer.” It is used for inking, for rolling out laminate to be glued down to counter tops and much more. The rubber can be of varying
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by casy_ch@tbwil.ch
Hi Roland A good idea with the cold laminator, I never thought of it. Thank you. By the way the roller you are using is a roller to apply ink on linoleum
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by rolohar@...
Malcom Parker: Good Idea: I use a rubber roller.......looks something like a paint roller, only smaller and with a rubber roller instead of fuzzy felt. If I
RE: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by duwaynes@...
Have not tried. But it is much easier to grab a fork , than to get out and set up the laminator. Only burnishing with moderate pressure for a bout a minute or
RE: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-31 by Malcolm Parker-Lisberg
What about using the laminator on cold to bond the toner to the board instead of burnishing ? Malcolm I don t suffer from insanity I enjoy it! Mene, mene,
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-30 by duwaynes@...
This was more of an experiment with doing a double sided board using cold toner transfer. The board was just one that I had ready to etch, and I wanted to
Re: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-30 by Malcolm Parker-Lisberg
DuWayne Very nice How to . Just a point, on the ground plane side, if there is no track or connection, why bother adding a pad, then alignment will be even
RE: [Homebrew_PCBs] Double sided cold toner transfer experiment
2016-01-30 by Nuno Tavares
NICE! Have tried the single side cold method myself with very good results. Looking at your double sided results, I guess the laminator has had it. :-) Nuno T.
Double sided cold toner transfer experiment
2016-01-29 by duwaynes@...
I had been very happy with the results I had using the cold toner transfer method, and wanted to see if I how it would work doing a double sided board. I did
DK5NOA's 20 W amp mods
2016-01-28 by Marc.olanie@...
Hi Enno As I m struggling with amps, I ve decided to build another version of the G6ALU 20 W version (this one will be running withK7FO s Hermes Lite) The
Re: [Homebrew_PCBs] homemade four layer boards
2016-01-27 by DJ Delorie
Jeff Heiss jeff.heiss@comcast.net [Homebrew_PCBs] ... It s hard to find but I search for copper clad laminate fr4 single or variations on those terms.
Re: [Homebrew_PCBs] Re: more experiments with Toner transfer by etching the boards first
2016-01-27 by rolohar@...
BRAKE FLUID?? No Way! Roland F. Harriston, P.D. ... From: MIKE DURKIN Patriot121@msn.com [Homebrew_PCBs] To:
RE: [Homebrew_PCBs] Re: more experiments with Toner transfer by etching the boards first
2016-01-27 by MIKE DURKIN
I think that brakefluid is not all that volatile ... ie does not evaporate very fast ... im not sure it will deposit on the PCB all that fast ... To:
RE: [Homebrew_PCBs] Re: more experiments with Toner transfer by etching the boards first
2016-01-27 by Howard Chester
I have been following post with interest, even though I only use the Photo expose and etch method. (I have had consistent results with 2 layer boards)As some
Re: [Homebrew_PCBs] homemade four layer boards
2016-01-27 by david.vb@...
Hi DJ, Ever considered to make an Instructable on your method? Would be great! Thx
RE: [Homebrew_PCBs] homemade four layer boards
2016-01-27 by Jeff Heiss
I’m contemplating blind vias by running wire though all layers, soldering the wires on the inner layers, and lastly soldering the outer layers. I think your
Re: [Homebrew_PCBs] homemade four layer boards
2016-01-27 by DJ Delorie
Jeff Heiss jeff.heiss@comcast.net [Homebrew_PCBs] ... Double-sided sticky tape. Really. I got some sheets of 3M double-sided adhesive film on eBay (the
homemade four layer boards
2016-01-26 by Jeff Heiss
DJ, Your site mentions making four layer boards. How do you make them? Are they two two layer boards glued together? How do you handle vias? The test board
RE: Vinyl mask, laser paint removal (was:Re: [Homebrew_PCBs] Plastic Resist From 3D Printer?) [1 Attachment]
2016-01-26 by Bob Butcher
... On Mon, 1/25/16, Jeff Heiss jeff.heiss@comcast.net [Homebrew_PCBs] wrote: Subject: RE: Vinyl mask, laser paint removal
RE: [Homebrew_PCBs] Re: more experiments with Toner transfer by etching the boards first [1 Attachment]
2016-01-26 by Boman33
I too like DJ’s test charts. For quick visual testing take a look at: http://vinland.com/USAF-1951.html It includes besides horizontal and vertical lines,
RE: [Homebrew_PCBs] Re: more experiments with Toner transfer by etching the boards first
2016-01-26 by Jeff Heiss
DJ has excellent test artwork of traces 15 mil to 1 mil (.38mm to 0.025mm) in pdf, png, and gerbers. http://www.delorie.com/pcb/spirals/ From:
RE: Vinyl mask, laser paint removal (was:Re: [Homebrew_PCBs] Plastic Resist From 3D Printer?)
2016-01-26 by Jeff Heiss
The unknown question is what type of laser and what power. This gentleman is using a UV laser and documenting his progress. http://gabuleu.blogspot.com/ From:
Vinyl mask, laser paint removal (was:Re: [Homebrew_PCBs] Plastic Resist From 3D Printer?)
2016-01-26 by Brad Thompson
On 1/25/2016 2:52 PM, Bob Butcher bbutcher85@yahoo.com [Homebrew_PCBs] ... Hello-- Not knowing anything about the vinyl mask method of PC board fabrication, I