Re: [Homebrew_PCBs] Re: solder paste choice
2009-05-16 by Philip Pemberton
... I was under the impression that most water-soluble fluxes were corrosive to some degree, and that No-Clean wasnt? Although to be truthful I tend to use
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Re: solder paste choice
2009-05-16 by Brian
Talking about QFN s, they dont really sit flush. I use a 10X scope at work and can t see a gap but flushing with water cleans it out. There is the gap of
Re: Laminator
2009-05-16 by sailingto
Makes sense to me - 400F sure seems VERY hot, but that is what the label inside the printer says. I do know that during toner transfer I set the toaster oven
Re: solder paste choice
2009-05-16 by Brian
Noclean is hard to clean and may be conductive. I had problems in rf circuits even with my mega8 running at 8MHz. Just today I reworked 21 QFN s with water
Re: Laminator
2009-05-15 by Richard
Some thoughts on temperature. Most plastics will melt below 300 *F. I don t know which plastics they use in toner but would think they have a melt well below
Re: Laminator
2009-05-15 by sailingto
Is that 260 to 280 degrees F? If so, then I doubt it will work for my Brother 2140 laser printer due to the high temp toner it uses. The Brother 2140 has a
Re: [Homebrew_PCBs] Re: Getting started with photoresist (UV) etching
2009-05-15 by Stefan Trethan
Regarding that, I have a CD-ROM PCB somewhere that has just that. The vias are filled with something that looks like conductive paste and covered with some
Re: [Homebrew_PCBs] Re: Getting started with photoresist (UV) etching
2009-05-15 by Stefan Trethan
Some people have a good gut feeling for what will work and what probably won t work. Anyone with soldering experience has probably made the observation that
Re: Getting started with photoresist (UV) etching
2009-05-15 by Daniel Howard Bryant
... I beg to differ, especially if you use a little wire whose diameter was significantly smaller than the hole or even perhaps a porous metal insert, so as to
Re: via's using homemade boards.
2009-05-15 by Brian
I have found problems with using 30AWG wire and the pin method, I even tried using 10mil trace repair kits. The solder mound is kinda big. I am using an AVR
Re: via's using homemade boards.
2009-05-14 by Ben
... Mouser webpage, Says Not in Stock with lead time of 8 weeks.
Re: [Homebrew_PCBs] Re: Getting started with photoresist (UV) etching
2009-05-14 by Simao Cardoso
Hi, don t take me wrong i don t want to kill both your enthusiasm, but forget the molten solder stuff. You will never do through holes with it. And even for
Re:Wire Balling : was via's using homemade boards.
2009-05-14 by Lee Studley
Forgot to mention: This was an alternative idea to making Tack Pins on the fly. -Lee
Re: Getting started with photoresist (UV) etching
2009-05-14 by stuart
... OK I had not thought of something like that. How would you attached the masks and what would make them out of? ... The ones my contractor does with his
Re: [Homebrew_PCBs] Re: PCB prototyping
2009-05-14 by Mark Lerman
Lately I ve been using Think and Tinker . Biggest problem is their $50 minimum. I have used Precise Bits, too, with no problems.
Re: Laminator - more detail please..
2009-05-14 by mikeh_dhr
Looks nice for the price. Do you run the boards through once, twice, ??? Do you do single sided or double sided? What board thickness have you done? Do you
Re: PCB prototyping
2009-05-14 by caveteursus
Who are you using for your supplies -- cutters, end mills and bits -- backup material? Precise Bits was recommended to me
Re: Getting started with photoresist (UV) etching
2009-05-14 by Daniel Howard Bryant
... I have not tried this, but I have thought about it a lot. My thinking was to use some sort of temporary solder mask(perhaps peel-able or regular) , mask
Laminator
2009-05-14 by Richard
I bought one of these laminators and replaced the snap switch temperature control with my own. Between 260 and 280 degrees it makes very repeatable toner
Re: [Homebrew_PCBs] Re: Getting started with photoresist (UV) etching
2009-05-14 by DJ Delorie
... Just a few days ago I posted a link to a program that lets me put down as much ink as I want, it s more a matter of how much can the film take without
Re: via's using homemade boards.
2009-05-14 by RICHARD HEILIGER
Also found the track pins on Mouser in the US.
Re: Getting started with photoresist (UV) etching
2009-05-14 by Ben
... I use Yellow ink, Works better than Black ink. Also if you have a printer that lets you increase the amount of ink is good too. Ben
Re: [Homebrew_PCBs] Someone want a board to etch?
2009-05-14 by Jack Coats
Thank you. I will contact you off list. IHS ... Jack ... [snip] [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Getting started with photoresist (UV) etching
2009-05-13 by DJ Delorie
... The standard measure of exposure is a transmission step wedge - it s a film with various calibrated steps of opacity from clear to opaque . If you
Re: [Homebrew_PCBs] Getting started with photoresist (UV) etching
2009-05-13 by Philip Pemberton
... What do you mean by steps ? ... I ve pretty much decided on Microtrak after spending most of the evening digging through MSDSes and datasheets. That s a
Re: Getting started with photoresist (UV) etching
2009-05-13 by stuart
... I have used only photo-etch so hopefully I can answer some of your questions. ... I have always made my own. My first and second were wooden boxes, but my
Re: [Homebrew_PCBs] Someone want a board to etch?
2009-05-13 by Alessio Sangalli
I think I could do those for you (for free of course) Is it single or double face? Can you at least drill the holes by yourself? Or is it SMD? Can you provide
Re: [Homebrew_PCBs] Getting started with photoresist (UV) etching
2009-05-13 by DJ Delorie
... I ve found that ink blocks UV better than toner (8 steps vs 3 for toner). I ve heard that photo inks have an extra UV inhibitor in them, but I haven t
Wire Balling : was via's using homemade boards.
2009-05-13 by Lee Studley
Wire Balling : was Re: via s using homemade boards. Some ideas ( similar to that done on die bonders with hydrogen flame ball forming ) May this could be done
Re: [Homebrew_PCBs] Someone want a board to etch?
2009-05-13 by Jack Coats
Sorry for the lack of information. I am near Nashville Tennessee 37015. Small boards, I don t have it in front of me, but about 2.5 wide and 3.8 long has
Re: [Homebrew_PCBs] Someone want a board to etch?
2009-05-13 by Alessio Sangalli
... Which country do you live in, ... state, size of the boards, single/double, etc ?? Give us a little more information so that we can help you bye as
Re: [Homebrew_PCBs] Getting started with photoresist (UV) etching
2009-05-13 by KeepIt SimpleStupid
I m going to mention a few things that I have mentioned before: I used translucent Polyester paper. I don t have a source right now. Toner adheres very well
Someone want a board to etch?
2009-05-13 by Jack Coats
I have not set up to etch boards, but I need a couple done. Two small identical boards, 2 sided. I don t think they are to complicated. If someone would like
Re: [Homebrew_PCBs] Re: via's using homemade boards.
2009-05-13 by Philip Pemberton
... Harwin still make those. They re called track pins . http://uk.farnell.com/harwin/t1559f46/track-pin-0-84mm-pk500/dp/1143874 (500x)
Getting started with photoresist (UV) etching
2009-05-13 by Philip Pemberton
Hi guys, I realise most people in this group are using toner-transfer, but I did notice a few folk talking about the more traditional photo-etch based
PBM to ESC/P2 converter
2009-05-12 by DJ Delorie
Having grown dissatisfied with the options The GIMP was giving me for controlling my printer when printing films, I decided to write a utility to do that task
MG Chemicals dry film?
2009-05-12 by DJ Delorie
http://www.mgchemicals.com/products/416dfr.html I need to buy more negative dry film, and MG just came out with theirs. Has anyone used it? Their web pages
[SPAM] Re: [Homebrew_PCBs] Re: via's using homemade boards.
2009-05-12 by Steve
Please trim the [SPAM] off when your filter adds it to the subject line. It makes the list look bad to random passerby. Steve Greenfield
Re: via's using homemade boards.
2009-05-12 by javaguy11111
I have used 30 gauge wire under components. My procedure is 1. Drill via holes just slightly larger than the wire size. I can not remember which drill number
Re: [SPAM] Re: [Homebrew_PCBs] Re: via's using homemade boards.
2009-05-12 by leon Heller
... From: KeepIt SimpleStupid To: Sent: Tuesday, May 12, 2009 1:23 AM Subject: [SPAM] Re:
Re: via's using homemade boards.
2009-05-12 by Brian
I already have some the type 10 in your link for wirewrap but I think using a pin from a header would be cheaper, flush solder and easy.
Re: [Homebrew_PCBs] Re: via's using homemade boards.
2009-05-12 by KeepIt SimpleStupid
Repost with added info at bottom. Probably 25 years ago when Priority One Electronics was around, they has these long strips of interconnected tacks which you
Re: [Homebrew_PCBs] Re: via's using homemade boards.
2009-05-12 by KeepIt SimpleStupid
Probably 25 years ago when Priority One Electronics was around, they has these long strips of interconnected tacks which you could press into the hole and then
Re: via's using homemade boards.
2009-05-11 by Brian
Now that looks like the best I have heard. I m going to use that method. Can I say it now... why didnt I think about that .
Re: via's using homemade boards.
2009-05-10 by derekhawkins
... Pressed fit header pins work best, especially for hidden vias. For the latter, you need to use flux on the tip of the pins after they are pressed flush
Re: [Homebrew_PCBs] Reflow kit from PCB-Pool
2009-05-09 by Stefan Trethan
I got one of their free stencils on thursday. The first board went OK, with the second the stencil lifted slightly and I got paste underneath, I could not use
Electroplating to get plated through holes
2009-05-08 by Ronny Eia
Has anyone tried Caswell s copper plating kits? Does it work for plated through holes? I want plated holes, and it seems like a OK kit to use. But is it suited
Reflow kit from PCB-Pool
2009-05-08 by leon Heller
This kit might be of interest: http://www.reflow-kit.de/rkuk/index.html They now provide free stencils with their PCB orders. Leon -- Leon Heller Amateur radio
Re: [Homebrew_PCBs] Question?
2009-05-08 by Viper62pr
Darnit, I wish you had asked that before, I have thrown out lots of both the .3 and the .6 tubes, I was not too happy about it either, I wanted to recycle them
Question?
2009-05-08 by michael tenore
Hi! Any one know where I can scrounge up some used IC storage tubes for .3 inch chips? I need about 100 to 150 of them! also some .6 inch also. I have a huge