Re: Photolithography
2006-02-19 by Len Warner
... http://www.thinktink.com/stack/volumes/volvi/pcbproto.htm Try this PCB Prototyping tutorial. It is pretty comprehensive and covers more processes than you
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Re: [Homebrew_PCBs] Re: Photolithography
2006-02-19 by Leon Heller
... From: Len Warner To: Sent: Sunday, February 19, 2006 9:26 PM Subject: [Homebrew_PCBs] Re:
Re: Photolithography
2006-02-19 by Len Warner
... Leon, notice the OP appears to be in Spain, not our gloomy northern latitudes: he may be able to get by with a daylight exposure as long as the sky is
Re: [Homebrew_PCBs] Re: Photolithography
2006-02-19 by Leon Heller
... From: patroclus04 To: Sent: Sunday, February 19, 2006 8:51 PM Subject: [Homebrew_PCBs] Re:
Re: Photolithography
2006-02-19 by patroclus04
Thank you, I think I get the point. Just have two questions about. and put the board and transparency on the glass. I then put a heavy book on top of the
Re: [Homebrew_PCBs] Re: Photolithography
2006-02-19 by lists
In article , ... OK The tubes and control gear are mounted in box with a glass top. You lay the transparancy on top of the glass and
Re: Film Caps - Was-Please critique my first attempt at pcb etching
2006-02-19 by John Popelish
... You are welcome. I hope I didn t overstate the horrors of greenies . They are made and sold in great numbers because there are many applications that do
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by John Popelish
... (snip) ... (snip) When I look for beauty or uglyness in a PCB design, I try to visualize the fields surrounding the traces and heat generated in them.
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by John Popelish
... It is a value that manufacturers are reluctant to put on their data sheets. But integer microhenries is a fair guess for a 2200uF, 35 volt electrolytic.
Re: Film Caps - Was-Please critique my first attempt at pcb etching
2006-02-19 by alan00463
Thanks, John, for your comments on series inductance in capacitors. And warnings on which ones to watch out for. And for the pics. Very helpful!
Re: Film Caps - Was-Please critique my first attempt at pcb etching
2006-02-19 by John Popelish
... You are welcome. ... (snip) Actually, film capcitors are often used in RF design. But details of construction methods and dielectric properties count for
Re: Film Caps - Was-Please critique my first attempt at pcb etching
2006-02-19 by kilocycles
John, Thanks for the info in your post. It s now in my Design folder on my hard drive. Your explanation provides a good example of why we don t use film
Re: [Homebrew_PCBs] Re: Photolithography
2006-02-19 by lists
... Proprietry developers (supposedly safer to handle than NaOH) are also available and some boards specify different strengths for this. For a lot of boards
Re: [Homebrew_PCBs] Re: Isopropyl Alcohol
2006-02-19 by lists
In article , ... Well, I think the availability of chemicals in the US must be rather different to the UK situation. The local
X/Y Stable film
2006-02-19 by stdf23173
Hello All, For years i have been making UV exposed PCB s without a problem. Even SMD and traces of 10 mill go well. But lately i have trouble printing my
Re: [Homebrew_PCBs] Re: Photolithography
2006-02-19 by Leon Heller
... From: patroclus04 To: Sent: Sunday, February 19, 2006 10:35 AM Subject: [Homebrew_PCBs] Re:
Re: Photolithography
2006-02-19 by patroclus04
Hi, thanks for your reply. I m not sure if I understud. Should I use both a UV light tube and a fluorescent tube? Also, I would need developer, and I think
Re: [Homebrew_PCBs] Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by Leon Heller
... From: sbdwag To: Sent: Sunday, February 19, 2006 9:59 AM Subject: [Homebrew_PCBs] Re: Please
Re: [Homebrew_PCBs] Photolithography
2006-02-19 by Leon Heller
... From: patroclus04 To: Sent: Sunday, February 19, 2006 9:15 AM Subject: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Photolithography
2006-02-19 by Mycroft2152
Hi, Any photos? That would help is seeing whatt is wrong. I ve done a few surface mount boards succesfully with toner transfer. Myc ...
Re: [Homebrew_PCBs] Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by Mycroft2152
Hi Dennis, As long as the board works for you, that is all that matters. Ignore the criticism. Any pcb is better than a rat s nest of wires. If you are going
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by sbdwag
What magnitude of inductance,uh,mh would a 2200uf cap have. Regards Dennis Waggoner ... etching ... sort of
Photolithography
2006-02-19 by patroclus04
Hello, I ve been doing some PCBs by hand for a year or so. Now I would like to use SMD and superficial IC, and I need more accuracy and posibility of making
Re: [Homebrew_PCBs] Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by Leon Heller
... From: sbdwag To: Sent: Sunday, February 19, 2006 4:37 AM Subject: [Homebrew_PCBs] Re: Please
Re: [Homebrew_PCBs] Re: Coating of copper traces
2006-02-19 by JanRwl@AOL.COM
In a message dated 2/18/2006 12:41:21 P.M. Central Standard Time, kilocycles@yahoo.com writes: Yes, there is. Click on Making a PCB board at home. ... Yes,
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by John Popelish
... It has to do with how big electrolytics are constructed. One plate of the capacitor is a conductive liquid (the electrolyte that gives the type its
Re: [Homebrew_PCBs] Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by Mike Young
Actually, it s the high ESR, which masks the lead and trace inductance. Or something like that. I m sure others will correct this quickly if it s the least bit
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by sbdwag
Im curious how do big capacitors have internal inductance. If they have inductance wouldnt that cancel some of the capitance that they have? Are you talking
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by John Popelish
... A point you might keep in mind is that big electrolytic capacitors have quite a bit of internal inductance, so it isn t so important that they have very
AC to PCB
2006-02-19 by J
Does anyone have idea about how to attach an AC line to a PCB board? I have a transformer that is actually on the board itself. Is this a good/bad idea? Do I
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-19 by sbdwag
Len I am really just a grasshopper but the power supply circuit filters well and is very stable. http://www.wagsterstuff.com/photos/pssch.jpg
Re: [Homebrew_PCBs] Re: Isopropyl Alcohol
2006-02-18 by Mycroft2152
I would be careful of the gas line antifreeze. Since it going to be burned up, it may be an off spec version (to make it cheaper) with other components in it.
Re: Isopropyl Alcohol
2006-02-18 by dl5012
I ve used both and I ll tell you that 30% water makes a big difference in the amount of residue left behind. Many printers specify using 98+% IPA and will
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-18 by Len Warner
... I don t mind the layout not being perfectly symmetrical. What I don t understand is why the negative output is a model of good decoupling and the positive
Re: [Homebrew_PCBs] Isopropyl Alcohol
2006-02-18 by microsoftwarecontrol
car s gas line antifreezer, is pure isopropyl alcohol. why don t use it? ... From: kilocycles To: Homebrew_PCBs@yahoogroups.com Sent: Saturday, February 18,
Re: Re: Coating of copper traces
2006-02-18 by Len Warner
... It s electroplating and, post-etch, all our tracks are isolated :-( I suppose it could be made to work on a track-by-track basis with a contact probe and
Re: [Homebrew_PCBs] Isopropyl Alcohol
2006-02-18 by lists
In article , ... Hmmm, and the moment you open the bottle it will start absorbing water from the air - stop worrying about it.
Re: [Homebrew_PCBs] Re: Coating of copper traces
2006-02-18 by Wayne Topa
... I din t know you were looking for them Ted. Wayne WA1BBB FN22PO N 42 35.776 W 74 41.201
Re: [Homebrew_PCBs] Isopropyl Alcohol
2006-02-18 by Leon Heller
... From: kilocycles To: Sent: Saturday, February 18, 2006 6:50 PM Subject: [Homebrew_PCBs] Isopropyl
Re: [Homebrew_PCBs] Isopropyl Alcohol
2006-02-18 by Evan Dudzik
I don t see why a little water is a problem... usually there s a couple minutes between cleaning and use for it to dry for me, and doing toner transfer, i
Isopropyl Alcohol
2006-02-18 by kilocycles
There was thread awhile back about using isopropyl alcohol as a board prep cleaner. The typical stuuf you find is 70%, but you can also get 91%, which is what
Re: Coating of copper traces
2006-02-18 by kilocycles
Hi Jim, How do they do it in Alaska? :) Good to see yet another ham in the group. 72, Ted KX4OM
Re: Alternative Tinning Product -Liquid Tin
2006-02-18 by kilocycles
In the 2006 catalog, page 1612, they now have Liquid Tin in a 4.2 oz. bottle for $8.35. They still have the 17 oz. one that you mentioned. The question is,
Re: Coating of copper traces
2006-02-17 by bob_ledoux
Has anybody tried electroplating, like this kit: http://www.caswellplating.com/kits/tin_plate.htm
Re: [Homebrew_PCBs] Alternative Tinning Product -Was: Coating of copper traces
2006-02-17 by Alan King
... Now that you mention it, since it s an active agent I wonder how much of this is oxygen related? If that s the major part, then it might be worth an extra
Re: [Homebrew_PCBs] Please critique my first attempt at pcb etching
2006-02-17 by JanRwl@AOL.COM
In a message dated 2/17/2006 9:14:47 A.M. Central Standard Time, sbdwag@voyager.net writes: http://www/wagsterstuff.com/photos/pdbd.jpg
Re: [Homebrew_PCBs] Alternative Tinning Product -Was: Coating of copper traces
2006-02-17 by JanRwl@AOL.COM
In a message dated 2/17/2006 5:40:28 A.M. Central Standard Time, kilocycles@yahoo.com writes: Has anyone tried the tin-in-a bottle product that s sold by
Re: [Homebrew_PCBs] Alternative Tinning Product -Was: Coating of copper traces
2006-02-17 by JanRwl@AOL.COM
In a message dated 2/17/2006 5:40:28 A.M. Central Standard Time, kilocycles@yahoo.com writes: I tried Tinnit, but I m not much of a cook. Actually, I had just
Re: [Homebrew_PCBs] Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-17 by Mycroft2152
Hi Dennis, To change the size of the pad in EAGLE. Click on EDIT - CHANGE - DIAMETER. Select the size you want then click on the pad itself. That will do it.
Re: Please critique my first attempt at pcb etching (links corrected)
2006-02-17 by sbdwag
Dennis Thanks again. Actually the ground plane was created in paint shop pro. I just created a negative image. Made a selection set with magic wand then used