Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by DJ Delorie
Try using laser transparencies instead of inkjet transparencies (assuming the toner will release afterwards). The pin trick is easier if you pre-poke the holes
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Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Leon
... From: Michel Baguet To: Sent: Friday, July 04, 2008 5:40 PM Subject: Re: [Homebrew_PCBs] double sided
Re: [Homebrew_PCBs] Eyelet press recommendation
2008-07-04 by Harvey White
... I use eyelets (0.050 diameter), copper, and then separate vias. This allows me to use a small (!) ball peen hammer and a block of aluminum or steel as an
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
What do you mean by some succes ? Is-it often, 3 out of 5, or less ? Is there a big off-registration ? ... From: DJ Delorie Subject: Re:
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
The transparent is already deformed when passing thru the fusing unit of the printer and the the deformation are not regular. For exemple, the corners align
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
Do you use plain paper ? ... From: Dylan Smith Subject: Re: [Homebrew_PCBs] double sided PCB, accuracy To: Homebrew_PCBs@yahoogroups.com
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
the main problem is that the transparent get deformed while passing thru the fusing unit of the printer. ... From: Leon Subject: Re:
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
Using a filler is partway what I m doing. I put a target at each corner of the two sheets, align them with needles then lift one of the sheet to insert a piece
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by DJ Delorie
... Another thing to try is to tape *three* corners, not two. The extra tension helps hold the seam centered on the thickness of the board. Not that I ve ever
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by DJ Delorie
... Ah, that. What I did was calibrate the deformity once (transfer a 3x3 square to a board and measure it) and compensate for it in PCB. To align two sides,
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Dylan Smith
... I ve never found it to be a problem. I only had bad registration on one board I ve made this way, and even then it wasn t bad enough that the board
RE: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Bertho Boman
Sticking the tail or joint between two half thickness spacers (strips) forces the tail to be in the middle and the artwork aligns. To use the alignment pins
Eyelet press recommendation
2008-07-04 by perroinmaui
Hi, I am about to order eyelets, anvil, and forming tool from international eyelets. I guess I would also need an anvil press. Do you have any recommendations
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Leon
... From: Harvey White To: Sent: Friday, July 04, 2008 2:09 PM Subject: Re: [Homebrew_PCBs] double
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Harvey White
On Fri, 4 Jul 2008 09:47:55 +0100 (BST), you wrote: I ve always had a conceptual problem doing it exactly this way. I can see that if the joint between the
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Dylan Smith
... First, I presume you re using glossy inkjet paper for toner transfer from a laser printer. If that s the case you don t need to muck around with
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by fana cute
I never try this, but I read from some article (i ve forgotten where) that problem is from your ink printer...and the article advised to use epson ink.. ...
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by Michel Baguet
Well, line up is not a problem. it s the transparent getting deformed when heated. ... From: DJ Delorie Subject: Re: [Homebrew_PCBs] double
Re: [Homebrew_PCBs] double sided PCB, accuracy
2008-07-04 by DJ Delorie
What I ve been doing is including a target in my prints (four 25 mil squares in a square, with a 1 mil gap - that translates to a 1 mil ink crosshair when I
double sided PCB, accuracy
2008-07-04 by Michel Baguet
hi guys, I got to the point where I can etch 6 mils traces and 32 mils vias with a 12 mils hole with inkjet paper. To align both side, I tried inkjet
Re: [Homebrew_PCBs] Re: Muriatic Acid and Peroxide Brew
2008-07-03 by Philip Pemberton
... More like txt-speek. SMS text messaging tends to warp the mind... -- Phil. ygroups@philpem.me.uk http://www.philpem.me.uk/
Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
2008-07-03 by Leon
... From: YD To: Sent: Thursday, July 03, 2008 1:12 PM Subject: Re: [Homebrew_PCBs] Ferric Chloride -
Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
2008-07-03 by YD
Here are a couple of webpages giving a bit more detail on the reactions: http://artmondo.net/printworks/articles/ferric.htm
Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
2008-07-03 by YD
... From: Leon Subject: Re: [SPAM] Re: [Homebrew_PCBs] Ferric Chloride - Alternatives To: Homebrew_PCBs@yahoogroups.com Date:
Re: [SPAM] Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
2008-07-03 by Leon
... From: YD To: Sent: Thursday, July 03, 2008 12:17 PM Subject: [SPAM] Re: [Homebrew_PCBs] Ferric Chloride
Re: [Homebrew_PCBs] Ferric Chloride - Alternatives
2008-07-03 by YD
If you revigorate it with a slug of HCl after etching a board or two, over time the Fe will oxidise and settle as insoluble FeO. Then just decant it. That s
Re: Muriatic Acid and Peroxide Brew
2008-07-02 by Andrew
... Isn t that 1337-5P33K
[Homebrew_PCBs] Inkjet Question
2008-07-02 by mlerman@ix.netcom.com
I m modifying an Epson R380 inkjet printer for use as a direct resist printer using Mispro inks. Can I just load the black cartridge with the yellow Mispro
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by fana cute
yes, like a gel but more creamy..you must try this,..i made from diazol+SR(its catalis) from photo silk screen emulsion., then i applied with copper at
Re: [Homebrew_PCBs] Re: Muriatic Acid and Peroxide Brew
2008-07-02 by DJ Delorie
... Hi. ... Please use whole words, not leet-speak. I haven t tried using the sponge technique with photoresist yet, but I have used it with toner transfer.
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by Herbert E. Plett
... a gel? how did you create it? aqueous or solvent based? UV or visible light?
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by fana cute
Spinning, I think it cannot be done, because the photoresist is not a liquid...it is creamy, like gel...can you help me? ... From: Herbert E. Plett
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by Herbert E. Plett
can you tell formula of cream? did you try spinning?
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by fana cute
i have bake that, but i dont have the maximum or minimum limitation...i just bake then for 1-2 minute..i also have any problem with applying the photoresist
Re: [Homebrew_PCBs] Re: What's the best photoresist?
2008-07-02 by Herbert E. Plett
... have you tried baking the board before etching? (something similar to what the direct print people do)
Re: What's the best photoresist?
2008-07-02 by fan_nastelroy
... i have tried with the Diazol for photo silkscreen, it must be mixing with his katalis(SR liquid), its have yellow/orange color.. it pretty after exposure
Re: Muriatic Acid and Peroxide Brew
2008-07-02 by TonyB
Hi. With the FeCl and sponge technique , what do U use for resist? Are U the pre-sensitized pcb?? thanx T
hii
2008-07-02 by fana cute
... Hii everybody, i m new in here, i m sorry to mycroft2152 coz reply his message directly.. I m very interested with dry film photoresist, but in my
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-02 by DJ Delorie
... Well, if I m in a hurry I can hand etch with hot FeCl and a sponge in under a minute. For now, with the CuCl, I just put it in and go do something else.
RE: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-02 by Bertho Boman
You have a lot of patience! I have not etched any PCBs for a few years but I used to do quick single sided ones for prototypes and fixtures. Smaller boards I
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-02 by DJ Delorie
... Your web page says 1.2 to 1.4 specific gravity, hence my check my math posting - to get 3l (3kg) of water to 1.2 sg, you need 20% more mass, or another
Re: [Homebrew_PCBs] photo chemicals name
2008-07-01 by Myc Holmes
Adam is correct. Today s chemistry is pretty sophisticated. Buy the boards pre-coated, or use the sprray from a can. If you really want, you can get film that
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-01 by Adam Seychell
... A pure CuCl2/HCl etchant can work with fairly wide range of copper concentrations. From memory the copper should be in the 70 to 120g/l range for optimum
Re: [Homebrew_PCBs] photo chemicals name
2008-07-01 by Adam Seychell
... I don t think you can easily formulate our own liquid photoresists that perform as today s commercial photoresists. Exact ingredients and manufacture
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-01 by DJ Delorie
The peroxide decomposes into water and oxygen real fast, so some peroxide will rejuvenate it a little, but consider that you started with *2/3* peroxide - a
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-01 by Stefan Trethan
2/3 peroxide lets me think this was low concentration medical stuff. With that there is almost no way to continue using the etchant, since it adds too much
Re: [Homebrew_PCBs] Muriatic Acid and Peroxide Brew
2008-07-01 by Roland Harriston
Good Heavens! The brew is so inexpensive, why try to save it? After etching the PCB, just neutralize the brew with sodium bicarbonate and flush it down the
photo chemicals name
2008-07-01 by palplr
Can any one say what are the easily avaliable photo checmicals to spray or paint on the bare pcb for either positive or negative print. If not can we make from
Re: [Homebrew_PCBs] Re: Ferric Chloride
2008-07-01 by Myc Holmes
Hi Leon, I thought of you whiel in a pool supply store today. They had pallet loads of gallon jugs ofHydrogen Peroxide 27%. the price was $6.99US per gallon.
Muriatic Acid and Peroxide Brew
2008-06-30 by Jim Klitzing
OK, I made up some of this stuff...2/3 peroxide and 1/3 acid, and it worked fine the first time. Nice light green color when done, so I set it aside in a