Re: [Homebrew_PCBs] Re: Printer Is ACETONE a carcinogen
2017-02-02 by Harvey Altstadter
I am always blown away when I go into the Nail parlor that my wife goes to. The smell of acetone in overpowering. It doesn t seem to bother anyone that they
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Re: [Homebrew_PCBs] Re: Printer Is ACETONE a carcinogen
2017-02-02 by John Marshall
Rob, I have found it useful to search the web for creditable, authoritative sources for questions like this. Wikipedia may not always fit those criteria, but
Re: [Homebrew_PCBs] Re: Printer Is ACETONE a carcinogen
2017-02-02 by Stefan Trethan
No, acetone is not a carcinogen. It is similar to ethanol in toxicity, your liver can break down small quantities. ST On Thu, Feb 2, 2017 at 7:26 PM, Rob
Re: [Homebrew_PCBs] Re: Printer Is ACETONE a carcinogen
2017-02-02 by Al Moyle
Acetone is the main ingredient in fingernail polish remover. On Thu, Feb 2, 2017 at 1:26 PM, Rob roomberg@ptd.net [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Printer Is ACETONE a carcinogen
2017-02-02 by Rob
I was told by a 70 year old chemistry teacher that I should avoid using ACETONE because ACETONE is definitely a bad ass carcinogen. any ideas here? I always
Re: [Homebrew_PCBs] Re: Printer
2017-02-02 by Harvey Altstadter
I did a search on toner density spray, to see what it is. From several sites that I found, unsurprisingly, that it appears to be a combination of solvents like
Re: Printer
2017-02-02 by Kevin Byrne
I know how to accomplish all that is talked about using my printer a HP Lasarjet P2015dn but have one question if I may. Does anybody know of a tutorial for
Re: Printer
2017-02-02 by Kamen Lilov
Here is my setup: * LaserJet 2100 - bought this refurb for about $80, including refilled cartridge * LaserJer has ethernet module (otherwise it s LPT only,
Re: [Homebrew_PCBs] Re: Printer
2017-02-02 by Rob
Cheap TRF experiment: http://www.learnmorsecode.com/laminator/trf/index.html
Re: Printer
2017-02-02 by craigl2@...
Use your laser printer to make transparencies. When I was trying toner transfer to make PCBs I bought some Green TRF from the PCB Fab - in a - Box site.
Re: [Homebrew_PCBs] Printer
2017-02-02 by Russell Shaw
... I m using the gutenprint driver in linux and can get high ink density on an epson Artisan 1430. Some types of settings can override each other preventing
Re: [Homebrew_PCBs] Printer
2017-02-01 by Steve B.
I use the HP Laserjet 2300n printer with the yellow paper/heat transfer stuff and the black seems very dense to me. These have a good toner density setting
Re: [Homebrew_PCBs] Printer
2017-02-01 by Jens Tunare
Hi Stuart, I have made PCBs with transparencies for many years. 20 years ago I made the transparencies with an HP color laser printer with good results. Then
Re: [Homebrew_PCBs] Printer
2017-02-01 by Roland Harriston
Hi Stuart: I had essentially the same problem using a cheap HP Inkjet printer. My solution was to print my PCB images (artwork) on a good grade of tracing
Printer
2017-02-01 by lists
I m asking this on behalf of a friend I make my own PCBs by a photo process, which involves printing a transparency from the PCB artwork I ve created. Just
File - monthly.txt
2017-02-01 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] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-18 by Malcolm Parker-Lisberg
No good for high impedance or high voltage PCBs as it leaves a high resistance conductive film on the non track areas. It is OK for logic level boards, but
RE: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-18 by roylowenthal@...
If you want to tin plate existing copper tracks, there s an easy way: Roy
RE: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-18 by chuck richards
We could stop, but for some reason now I want to continue it. I wonder why that might be? ... From: Homebrew_PCBs@yahoogroups.com To:
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-17 by Jean-Paul Louis
I agree with Rob, There are no stupid questions, only stupid answers sometimes. I do not understand why David want to stop this conversation. If he does not
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-17 by Rob
I was asking a chemistry question here on HOMEBREW_PCBs because we have a number of VERY toxic processess that we use to etch PCBs and we often had chemists
RE: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-17 by Malcolm Parker-Lisberg
Why stop it, who knows where it may lead, even to a simple way of plating the copper tracks. Malcolm I don t suffer from insanity I enjoy it! Mene, mene,
RE: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-17 by David C. Partridge
Can we stop this off-topic discussion please
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water andsaturated copper sulfate crystals ?
2017-01-17 by chuck richards
... They are great cells to make and to experiment with. As a young boy, I was at home in the basement making wet cells of all various kinds, while the rest of
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-17 by Rob
I stumbled on this perfect answer: What Happens in a Battery if Zinc Sulfate Is Mixed With Copper Sulfate? by Serm Murmson Chemical reactions can generate
what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ? the net
2017-01-17 by Rob
RE: Just because you find articles on the Internet, that’s not a proof of good engineering practices. There is a lot of garbage in the Internet, but there is
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-16 by Jean-Paul Louis
Hi Rob, Beside having fun experimenting, what would be the use of such awfully low performance battery? the article claims high internal resistance and 0.25V
RE: [Homebrew_PCBs] what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-16 by keith printy
I remember my younger days where we had a kit from remco called electro chemistry. They sold others also but they had containers,zinc strips and copper strips
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-16 by Rob
Thanks for the link. What this says to me is that if I build this battery and seal it as the instructions described then its not a big toxic hazard waiting to
Re: [Homebrew_PCBs] what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-16 by Harvey Altstadter
Rob, For a battery demonstration, stick to the lemon juice. You might want to stay away from the copper sulfate-
what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ?
2017-01-16 by Rob
what is sulfate of zinc and acidulated water and saturated copper sulfate crystals ? Do we have any chemists out there? I found an old time article how to make
RE: [Homebrew_PCBs] Apache AL 13P2
2017-01-12 by goofy_36@...
I didn t know Jameco had those kits. Looks like something to add to my shopping list. :) David
Re: Apache AL 13P2
2017-01-11 by AncelB
Regarding the Apache 13P mod. kit: have a look here: https://hackaday.io/project/3363-apache-al13p-tl-320b-one-pass-pcb-toner-xfer regarding roller tensioning:
RE: [Homebrew_PCBs] Apache AL 13P2
2017-01-11 by Kevin Byrne
I now have your pdf info and will buy ASAP the mod kit so I can get good results every time. Best wishes Kevin
RE: [Homebrew_PCBs] Apache AL 13P2
2017-01-11 by K5ESS
And I forgot to paste the link. L https://www.jameco.com/Jameco/Products/ProdDS/2219461KitInstructions.pdf From: Homebrew_PCBs@yahoogroups.com
RE: [Homebrew_PCBs] Apache AL 13P2
2017-01-11 by K5ESS
Also meant to say I use .063 board material. Mike N From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] Sent: Tuesday, January 10, 2017
RE: [Homebrew_PCBs] Apache AL 13P2
2017-01-11 by K5ESS
I recommend that you buy this mod kit and install it. The instructions tell you the proper tightening of the screws. This kit may be available from other
Apache AL 13P2
2017-01-10 by kbyrne10@...
I just bought a Apache lam and have a question. I will be useing .063 or 1.58mm thick stock. The Pulsar pro site does not talk about thickness when turning the
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-08 by Rob
YES They use a much thinner axle so it is possible to use those gears if you can drill out the hole or file it into a D shape. On 01/08/2017 04:37 AM, Howard
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-08 by Howard Chester
Just a thought.......have you checked for gear sets from RC Model car and hobby robotics suppliers?
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-08 by Rob
Yes... thanks for the tip. I concluded that if I did not find I perfect match there I would definitely find something close...or close enough. My interest in
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-07 by Harvey Altstadter
Rob, Have you looked at the two ebay stores I posted a few days ago? Harvey ... Rob, Have you looked at the two ebay stores I posted a few days ago? Harvey On
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-07 by Rob
I ran into this very same issue. I did not have any gear making tools here set up that could just knock out a metal gear and slip onto the motor D shaft. After
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-07 by Harvey Altstadter
Rob, Unfortunately, knowing the spacing of the gear teeth is only the beginning of cutting gears. After I looked at the geargenerator website, I realized that
Re: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size offline
2017-01-07 by Rob
YES...better yet... IF YOU HAVE THE TECHNOLOGY This geargenetator.com script only runs on-line can NOT be stowed locally on your PC AND the reason I went to
RE: [Homebrew_PCBs] How to mark a gear to cut teeth ....any size
2017-01-07 by K5ESS
Better yet: http://geargenerator.com/#200,200,100,6,1,0,0,4,1,8,2,4,27,-90,0,0,16,4,4,27,-60,1,1,12,1,12,20,-60,2,0,60,5,12,20,0,0,0,2,-563 Mike N. From:
How to mark a gear to cut teeth ....any size
2017-01-07 by Rob
How to mark a gear to cut teeth ....any size... any number of teeth http://www.learnmorsecode.com/gears/index.html
Re: [Homebrew_PCBs] What is the proper way to wire a 3 wire synchronous motor
2017-01-06 by Donald H Locker
The capacitor provides a shift in phase of the excitation to one set of the motor s windings relative to the other windings. This provides a rotating magnetic
Re: [Homebrew_PCBs] What is the proper way to wire a 3 wire synchronous motor
2017-01-05 by KeepIt SimpleStupid
In general with a synchronous motor, there will be two windings with a common which you can identify with an ohmmeter. The suggested cap causes a phase
RE: [Homebrew_PCBs] What is the proper way to wire a 3 wire synchronous motor
2017-01-05 by K5ESS
The motor is built with a number of magnetic poles arranged around the stationary part of the motor (the stator) alternate poles are wound with the two