Re: [Homebrew_PCBs] Re: Inkjet film
2003-01-04 by Les Newell
Thanks to all who responded about inkjet film. I think I will try the 3M film. Les
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Re: Inkjet film
2003-01-04 by Ned Seith <seiths@earthlink.net>
Greetings, I use 3M Transparency Film for Canon and Epson Ink Jet Printers which is about 75 cents per sheet. I use this film with an Epson Color Stylus 400
Re: [Homebrew_PCBs] DeskPCB question
2003-01-03 by James Owens
Hi, You need to look at the CAD_CAM_EDM_DRO@yahoogroups.com there are a great number of other sites not connected with this list but they are buried in my
Re: Inkjet film
2003-01-03 by Ted Inoue <ted@soleburymountain.com>
Hi, I use Pictorico Premium OHP Transparency Film . The stuff is awesome. Heavy base, totally smear free, high resolution transparency film.
DeskPCB question
2003-01-03 by Jon Bevar <robasic@hotpop.com>
Hello, I just downloaded the DeskPCB and I would like to ask everyone here as to what type of PCB router is used? I would like to know if there are any plans
Re: [Homebrew_PCBs] Inkjet film
2003-01-03 by Russell
... I use epson over-head transparencies. They have a smooth coating that absorbs the ink, eliminating all pin-holes. It costs more than the printer ($3 per
Inkjet film
2003-01-02 by Les Newell
Hi all, Does anyone have a favourite make of inkjet film for printing artwork? It looks to be expensive stuff so I would like to use a brand that others have
Re: [Homebrew_PCBs] 4th board 99.9% perfect - thanks for the input!
2003-01-02 by Zoran A. Scepanovic
Hello ghidera2000, 01. January 2003, 20:29:37, you wrote: ggyc would qualify as a UV source - it doesn t (silly me :D) Exposed for ggyc 60 seconds and tossed
Re: [Homebrew_PCBs] 4th board 99.9% perfect - exposure
2003-01-02 by Adam Seychell
... The fluros good for photoresists (i.e. lots of 365nm energy) are known as BL or blacklight. They are white color when off and emit violet/blue when on.
Re: [Homebrew_PCBs] Choosing a trace width
2003-01-02 by JanRwl@AOL.COM
In a message dated 1/1/2003 10:19:07 PM Central Standard Time, ... Clear, now. [Non-text portions of this message have been removed]
RE: [Homebrew_PCBs] Choosing a trace width
2003-01-02 by High Tech
Hi Jan, The pads I am talking about here is the free pads, resistor small diodes, etc. The IC s are 50x100mil ovals normal size. These are already in the parts
Re: [Homebrew_PCBs] Choosing a trace width
2003-01-02 by JanRwl@AOL.COM
In a message dated 12/31/2002 11:53:10 PM Central Standard Time, ... Derek: This is kinda BIG for IC s, seems to me! Wouldn t the pad have to be considerably
Re: 4th board 99.9% perfect - thanks for the input!
2003-01-01 by ghidera2000 <ghidera2000@yahoo.com>
Oops, thats 12 mil, not 1.2 mil. ... shorts
4th board 99.9% perfect - thanks for the input!
2003-01-01 by ghidera2000 <ghidera2000@yahoo.com>
My third board was a flop. My plexi weight had a slight curve in it and I didn t notice - lost the traces in the center during development. For the fourth I
trace width
2003-01-01 by Dave Martindale
There s another reason for choosing a particular trace width: transmission line impedance. If you re working with UHF or microwave frequencies, the traces on a
File - monthly.txt
2003-01-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line
Re: [Homebrew_PCBs] Choosing a trace width
2003-01-01 by Alexandre Souza
... If I could find wire-wrap goods (wire and wrapper) in Brazil, I d be more than happy :o)))
RE: [Homebrew_PCBs] Choosing a trace width
2003-01-01 by High Tech
Been through this years ago. You will find everyone has trace widths and pads that they like to use. I am sure the calculations are correct but I wouldn t use
Re: [Homebrew_PCBs] Choosing a trace width
2003-01-01 by JanRwl@AOL.COM
In a message dated 12/31/2002 10:03:08 PM Central Standard Time, ... Yes! I think I heard, once, that 0.01 wide is about the practical limit for small. I
Choosing a trace width
2003-01-01 by ghidera2000 <ghidera2000@yahoo.com>
Been checking the net and I ve found a few trace width calculators. I m having trouble believing what I m seeing though! I have two 7 segment displays
Re: Banned Re: [Homebrew_PCBs] Your own COMPUTER STORE!!!
2003-01-01 by JanRwl@AOL.COM
In a message dated 12/31/2002 9:59:31 AM Central Standard Time, ... EXCELLENT! [Non-text portions of this message have been removed]
Re: Banned Re: [Homebrew_PCBs] Your own COMPUTER STORE!!!
2002-12-31 by Zoran A. Scepanovic
Hello Steve, 31. December 2002, 16:57:51, you wrote: SG This spammer is now banned from all the lists I admin. SG --- safelist0002002
Re: [Homebrew_PCBs] Second PCB attempt - 99% success!
2002-12-31 by Hans Wedemeyer
Steve, In ferric chloride I have used the following pens with zero problems: Avery Dennison MARKS-A-LOT Real handy for covering large area. Miller Scratch
Re: [Homebrew_PCBs] Second PCB attempt - 99% success!
2002-12-31 by Steve Greenfield
Actually, there is a difference in pens. I tested some on a board I etched. The only one that lasted 100% intact for the entire etch time was the Staedler
Re: [Homebrew_PCBs] Second PCB attempt - 99% success!
2002-12-31 by Hans Wedemeyer
Great... No you can let it dry and not etch for several days! If you wait too long the copper may oxidize and be more difficult to etch. Use a waterproof
Second PCB attempt - 99% success!
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
Have the etched board in my hand and its almost a beauty. One small void in a trace thats about 0.15 wide and a bridge between a pad and a trace. I think the
Banned Re: [Homebrew_PCBs] Your own COMPUTER STORE!!!
2002-12-31 by Steve Greenfield
This spammer is now banned from all the lists I admin. ... ===== Steve Greenfield // Digital photo scanning, retouching, Polymorph Digital
Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
And Zoran wins the prize! With the developer down to 69F I got a (seemingly) perfect result with a 5 minute exposure time. Its in the sparger now (no heater, I
Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
I decided to let the developer cool to room temperature before starting the timing experiments. 25C is about 77F so my 95-100F developer would definately have
Re: [Homebrew_PCBs] Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by adam Seychell
... Inkjet black images on transparency film is extremely opaque to UV-A radiation. In fact I find it almost impossible to do overexposure with my Epson Stylus
Re: [Homebrew_PCBs] Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by Zoran A. Scepanovic
Hello ghidera2000, 31. December 2002, 03:09:00, you wrote: ggyc -Poured two litres of hot tap water into a tray. === And I replied: As underlined! The
Re: [Homebrew_PCBs] Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by Russell
... Nothing could be further from the truth. Inkjet inks are excellent at blocking UV, but can be completely transparent to infrared. If i want a cheap IR
Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
I actually have an inkjet already. I emailed MG Chemicals and asked about using inkjets instead of laser. They replied and said that inkjet inks aren t UV
Re: [Homebrew_PCBs] Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by Hans Wedemeyer
The problem could be due to over exposure or developer is too strong. Laser transparencies ARE perfect and I have been using them for MANY years. Exposure and
Re: [Homebrew_PCBs] Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by Russell
... The problem is you used *hot* water. Make sure it s warmer than 20deg or it ll be slow. Make sure it s less than 30deg or it ll peel. 25deg is ideal. ...
Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
Good idea! I ll try that with another (small) board. Expose a strip at one end for 30 seconds then try the developer. If the whole board is stripped clean then
Re: [Homebrew_PCBs] Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by Adam Seychell
The most likely cause of the problem you describe is overexposure. For fix problem one you need to determine minimum exposure time. You do this by taking a
Re: Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
P.S. Traces were mostly 0.012 with power/ground at 0.02. Pads 0.07. Also, I expected this first board to be a total flop. Actually, I expect my first 5-10 to
Thoughts on where I went wrong? (1st pcb attempt)
2002-12-31 by ghidera2000 <ghidera2000@yahoo.com>
Just attempted my first photofabrication and it failed at the developing stage. Within 30 seconds of immersion the board was completely devoid of resist...
Re: Schematic Software
2002-12-30 by ghidera2000 <ghidera2000@yahoo.com>
While its still in development and has few library parts, PCB123 is shaping up to be a great *free* schematic and layout program. Its almost the same deal as
Re: Schematic Software
2002-12-26 by Dave Mucha <dave_mucha@yahoo.com>
Hi Jan, The problem you mentioned is not the one in the origional post. He requested some software that is readily available. Since the software is free,
Re: [Homebrew_PCBs] Through Hole Plating
2002-12-21 by James Owens
I agree, but if my maths is right about a quarter of the price. What I wanted to know was does it work. Terry Conductive paint is very expensive also... Hans W
Vacuum & Press n Peel
2002-12-21 by James Owens
Hi, There was talk a few days ago about using a vacuum pump when applying Press-N-Peel to a circuit board. Vac Pumps are expensive and Vacuum Cleaners don t
Re: [Homebrew_PCBs] Through Hole Plating
2002-12-21 by Hans Wedemeyer
Conductive paint is very expensive also... Hans W ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Through Hole Plating
2002-12-21 by James Owens
Hi, I know about this product its expensive and from America so what ever price is on it it is that plus shipping and 22% Tax on top. It is where I got the
Re: [Homebrew_PCBs] Through Hole Plating
2002-12-21 by Hans Wedemeyer
Here is a similar product used for hole activation: http://www.thinktink.com/stack/volumes/volvi/condink.htm hansw ... [Non-text portions of this message have
Through Hole Plating
2002-12-21 by James Owens
Hi, Has anyone tried the silver loaded conductive touch up paint for repairing car rear screen heaters for through hole plating. If the paint was forced into
Re: [Homebrew_PCBs] Copper plating
2002-12-21 by adam Seychell
... I ve read that grain structure has an effect copper etching speed. The copper on PCBs is made from electroplated foil over stainless steel drums is then
Re: [Homebrew_PCBs] Copper plating
2002-12-21 by Russell
... What is the phosphorous for? I ve found that hard-drawn copper shim etches much more difficult in FeCl than the copper on circuit boards. Why? (i ve tried
EveryThing in PCB's
2002-12-20 by James Owens
Hi, Here is a site with everything you ever wanted to know about making circuit boards. http://www.thinktink.com/ Regards, Terry [Non-text portions of this