Re: [Homebrew_PCBs] printer
2013-05-19 by Todd F. Carney / K7TFC
... What a good example, Mike, and in the face of such temptation, too! I was sorely tempted myself. 73, Todd ... K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
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RE: [Homebrew_PCBs] printer
2013-05-19 by Tony Smith
... How is Radio Shack doing these days? In regards to the OP s question, there s a list of printers (plus paper & laminators) that ll work for toner transfer
RE: [Homebrew_PCBs] printer
2013-05-19 by MIKE DURKIN
Ill just give a blank stare .... To: Homebrew_PCBs@yahoogroups.com From: hamshack@iowatelecom.net Date: Sat, 18 May 2013 14:48:05 +0000 Subject:
Re: [Homebrew_PCBs] printer
2013-05-19 by Leon Heller
... I get excellent results using an HP 5940 Deskjet printer, with Mega Electronics Jetstar Premium film. Leon -- Leon Heller G1HSM
Re: printer
2013-05-18 by AlienRelics
You will need to be more specific. Toner transfer? Photoresist? Direct resist printing? Each one has different needs. We have many people here skilled in their
printer
2013-05-18 by mcmurraygrouch57
whats a good printer to use to make pcb s. ron
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by lists
In article , ... Maplin - Arrgh Bought some board from them once, they had to order it because they had none in stock at the
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by lists
In article , ... Thank God for that. -- Stuart Winsor Midlands RISC OS and Raspberry pi
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Mitch Davis
... That it was an ad should be enough of a giveaway, that it was also on the TV means it s incredible. Desperate attempt to stay on topic: How long does
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Paul
... But they keep telling us on the TV ads that it is amber nectar! You imply they are telling porkie pies? :-) Real ale myself... proper Brit stuff. I do brew
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Mitch Davis
... I should clarify that I check the design. Here s a recent report for a customer: - No board outline file. Please see attached. The purple lines should
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Mitch Davis
... That s what I do. I speak Chinese so you don t have to. I check boards thoroughly and give a report on each one. This saves you a lot of time and money.
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Paul
Hi Mitch More power to you, it s a really great idea to have someone on the ground as an interface between Europe/USA and the Chinese PCB makers although I
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Mitch Davis
Hello Jeff, hello homebrewing PCB folks. First, something on-topic: When I was getting started with home etching, I also made a test strip. I used my CAD
RE: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Jeff Heiss
Do you mean $19 per board when 10 boards are ordered ($190 total)? What is the cost for one or two boards? Jeff _____ From: Homebrew_PCBs@yahoogroups.com
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-14 by Mitch Davis
... My 2c: When making boards at home I print onto drafting paper. 8mil is no problem:
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-13 by Harvey White
... As a complete guess on the exposure, look for a good exposure to be 3 to 4 minutes. This is based on my own experiences, different photoresist, more UV
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-13 by Paul
Hi Dave Maplin board! I nearly mentioned that when I replied before. I have had terrible problems with some batches from the local branch. I think some of it
Re: photo layer coming off
2013-05-13 by cunningfellow
... Well in that case def. do not use lye. Maplins might recomend it on the web page, but the manufacturer recomends sodium silicate on the package of the pre
Re: photo layer coming off
2013-05-13 by dave_donlan
cheers for the advice I will try another test strip but go over longer time. The uv box is a converted scanner with four UV 9W tubes from a nail curing unit
Re: photo layer coming off
2013-05-13 by smilingcat90254
One thing not mentioned so far is to cure the image after exposure-development. After the image is developed on the board, some recommend to cure the remaining
Re: [Homebrew_PCBs] photo layer coming off
2013-05-13 by Harvey White
... Take a strip of board, use a file or knife to score the board at about half inch intervals. Put your image on top. Put a piece of cardboard or something
Re: [Homebrew_PCBs] photo layer coming off
2013-05-13 by James
I ll assume you re using the cheap readily available negative exposure dry film. As others have said, 15 seconds, sounds too short. I use about 2m30s with
Re: [Homebrew_PCBs] Re: photo layer coming off
2013-05-13 by Todd F. Carney / K7TFC
... I also agree. Back in the 70s, I used an old arc-light unit--complete with carbon rods--that put out blinding light . . . I mean, really, really bright,
Re: photo layer coming off
2013-05-13 by tda7000
Totally agree. 15 seconds seems very short. With a bunch of fairly standard UV LEDs my Chinese eBay resist takes about 6-7 minutes to expose well. I also let
Re: [Homebrew_PCBs] photo layer coming off
2013-05-12 by Paul
Dave It does of course depend on the UV source and the photo board but 15s sounds far too short. Using laser printed art work on acetate, with my UV box (2 x
Re: photo layer coming off
2013-05-12 by cunningfellow
... As other have said, if you have not done a test strip you should. Is it positive or negative acting and what brand photopolymer? Most of them recommend
Re: [Homebrew_PCBs] photo layer coming off
2013-05-12 by Harvey White
... UV photo stuff exposes from the top down, you may not have exposed the resist enough. Did you do a test series of exposures, either through a variable
Re: [Homebrew_PCBs] photo layer coming off
2013-05-12 by Leon Heller
... Use a test strip with a range of exposure times to get the correct exposure. Leon -- Leon Heller G1HSM
photo layer coming off
2013-05-12 by dave_donlan
Hi guys I am using UV exposure method on clear acetate 15 secs exposure caustic soda developer about a 60 secs hydrochloric acid / peroxide etchant no bubbler
Re: etching solutions
2013-05-10 by ve7su
I was able to locate 29% H2O2 at the following location: http://www.finlandiapharmacyonline.com/products/O2XY%252dPLUS-Food-Grade-Hydrogen-Peroxide-29%25.html
Re: [Homebrew_PCBs] Re: Royal Sovereign Laminator mod question
2013-05-10 by KPL
correction, single-throw is enough, newly-added thermostat can be just switched paralel to the existing one. ... -- KPL [Non-text portions of this message have
Re: [Homebrew_PCBs] Re: Royal Sovereign Laminator mod question
2013-05-10 by KPL
I did a bit differently - did not replace existing thermostat, but added another one, with a switch to choose between them. That way, laminator can be used for
Re: [Homebrew_PCBs] Re: etching solutions
2013-05-09 by DJ Delorie
... I don t maintain the solution as well as I should. Sometimes it s as fast as 4 minutes, sometimes as long as 20. Depends on temperature, and I m probably
Re: [Homebrew_PCBs] Re: etching solutions
2013-05-09 by Todd F. Carney / K7TFC
DJ, Thanks. What are your typical etching times and temperature for, say, 1oz copper? Best , Todd ... K7TFC / Medford, Oregon, USA / CN82ni / UTC-8 ... QRP (CW
Re: [Homebrew_PCBs] Re: etching solutions
2013-05-09 by DJ Delorie
... The waste your trying to dispose of, is itself an etchant. Save it, eventually you ll have a Cupric chloride etchant that doesn t need to be disposed of
Re: [Homebrew_PCBs] Re: etching solutions
2013-05-09 by Todd F. Carney / K7TFC
... I use the 30% HCL ( muriatic acid ) from Home Depot (~$12/gallon) and the drug-store-variety 3% peroxide. I mix up only 2oz (~50ml) at a time for boards up
Re: [Homebrew_PCBs] Re: etching solutions
2013-05-09 by Jim
Some snippage ... You can get 40 weight peroxide, which I believe is 10%, from Sally Beauty Supply. It works fine. They have a lot of other interesting
Re: etching solutions
2013-05-09 by designer_craig
Lets see if I can remember the redox stuff from chemistry. The HCL/H202 is just the starter, the real etchant is the Cupric Chloride (+2 oxidation state)you
Re: etching solutions
2013-05-09 by timgmorris@att.net
I get about 2 days out of a HCL/H2O2 solution. The problem seems to be that the H2O2 breaks down into water very quickly. I ve even tried storing it in an old
Re: Seno 100 photo resist applicator
2013-05-07 by Ben L
... Did you ever get a reply back from them? Ben
etching solutions
2013-05-06 by N2CUA
Is there any issues with mixing etching solutions From 30% HCL / 30% H2O2 to the right concentrations/ ratios And mix together and store that way ? Or is there
Re: Royal Sovereign Laminator mod question
2013-05-06 by w9ran
... I have uploaded a copy of the wiring diagram into the Files Section under Laminator Mods . I d appreciate comments from anyone who is interested in
File - monthly.txt
2013-05-01 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: Royal Sovereign Laminator mod question
2013-04-30 by cunningfellow
I ve moded about 5 of the lowell/aldi laminators as per ultrakeet. There is a bimetalic and a thermal fuse. The bimetalic is for normal opperation and the fuse
Re: [Homebrew_PCBs] Royal Sovereign Laminator mod question
2013-04-30 by Harvey White
... I ll guess the 140 degree one. ... The temperatures seem to be either 110 or 120 degrees selectable by switch, with the 140 degree being an OMG switch to
Royal Sovereign Laminator mod question
2013-04-30 by w9ran
The Ultrakeet super-fuser mods sounded interesting: https://ultrakeet.com.au/write-ups/superFuserV2 Especially since the Royal Sovereign CS-923 is of similar
PCB Making Equipment
2013-04-29 by tgr8883
Hi everyone! I have some PCB making/assembly equipment I m looking to sell. I hope this is the right venue for it. I learned a ton about PCB s over the years
Re: Need advice for large PCB and sub-mini SMDs
2013-04-27 by timgmorris@att.net
That s good to know. I did notice on long small traces that i would get distortion but chalked this up to my iron being too hot. I tried using a cheap
Re: Need advice for large PCB and sub-mini SMDs
2013-04-27 by wcasse
i tried the Oracal 651 and got pretty good results, but found that my cheap laminator is not as good as my cheap iron. resolution down to about 7 mil. after