Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Stefan Trethan
It is very rare that i have to re-do a transfer, certainly less than 5%. Even then it is not a matter of throwing out the board, just removing the toner and
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Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Huggermugger
Frankly Stefan, is the Toner Transfer Method (TTM) working as good as any other kind of method? I have a laser printer but also on rare occassions a little
Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Stefan Trethan
Probably. One could make an exposure meter which integrates up with the same sensitivity as the resist. I ll stick to toner transfer, with the weather like it
Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Harvey White
... Time to dawn plus the normal exposure times for dim sunlight. Harvey
Re: [Homebrew_PCBs] Re: THRU HOLE PLATEING
2008-01-28 by Markus Zingg
Hi Suske No worries about your english :-) I m not sure if mine is so much better. To answer your questions. The small tanks hold 2.2 liters. The amount of
Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Huggermugger
How is this supposed to work when i need to make a board at midnight? ;-) Take a flight to the otherside of the planet .... I used something like 10 minutes
Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Stefan Trethan
Exactly! How is this supposed to work when i need to make a board at midnight? ;-) Anyone got the figures on moonlight exposure times? ST
Re: THRU HOLE PLATEING
2008-01-28 by suskeb
Hi Markus, Can you please tell me what is tanks capacity of your plating system baths? Second question is how much did you pay for chemicals to fill system for
Re: [Homebrew_PCBs] Re: Sunlight as a UV source?
2008-01-28 by DJ Delorie
... Thanks!
Re: [Homebrew_PCBs] Sunlight as a UV source?
2008-01-28 by Roland F. Harriston
You Have Got To Be Kidding!!! Roland F. Harriston, PD
Re: Sunlight as a UV source?
2008-01-28 by javaguy11111
It is referenced in the links, but take a look at http://www.prototrains.com/etch1/etch1.html http://www.prototrains.com/etch2/etch2.html The etch2 page has a
Sunlight as a UV source?
2008-01-28 by DJ Delorie
It s very uniform and highly collimated, but is it strong enough?
Re: [Homebrew_PCBs] Ferric chloride FS in Tacoma, WA
2008-01-28 by Ed Laughery
Sorry - Probably understood but my last should have read Ferric Chloride (powder). Ed N5XN ... From: Ed Laughery To: Homebrew_PCBs@yahoogroups.com Sent:
First Dry resist experimentation
2008-01-28 by javaguy11111
I finally got a chance to experiment some with the dry film resist. I just did a quick test where I applied the resist and put pennys on the surface. Here is
Re: [Homebrew_PCBs] Ferric chloride FS in Tacoma, WA
2008-01-28 by Ed Laughery
Hi Are you sure that it requires a hazardous chemical license to ship Ferric Chloride (power)? I have ordered and received same from Marlin Jones, Mouser,
Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-28 by javaguy11111
... I have seen those, but I have to wonder why they can sell 100 for 6 dollars or six cents apiece, while a distributor sells them for a dollar apiece. I know
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-28 by Russell Shaw
... Usually it means +/-10deg between 3dB points. The LEDs on ebay commonly show the radiation polar plot.
Ferric chloride FS in Tacoma, WA
2008-01-28 by Steve Greenfield
I bought some Ferric Chloride from a friend a few years ago for PCB etching, I ve decided to switch to another etchant due to the staining. I have seven
Reminder to trim replies
2008-01-28 by Steve
A reminder to everyone to trim your replies. Some of the list members pay for online time by the minute, and 3 pages of quoted message with one added line
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-28 by Adam Seychell
I just realized potential confusion about LED angle specifications. Is 20 degree LED a 20 degree from centre (or +-20 degree) or the total conical span (+-10
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-28 by Adam Seychell
Those are interesting thoughts on LED light boxes. I had the idea some time ago ,but my preliminary calculations showed that my 400W mercury vapour light box
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-27 by Markus Zingg
I currently also use 20 degree LEDs and so far I m very happy with the setup. I observed though that it seems to become harder to get those I have already.
Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-27 by javaguy11111
I can never avoid making some mistake when typing something up. The 8 degree half angle should be a 4 degree half angle.
Re: Small Quntities of Dry Film Resist (UV LEDs)
2008-01-27 by javaguy11111
While searching around I saw the 8 degree LEDs from LEDTronics as well. I decided to stick with the 20 degree leds. I had done a quick calculation for the
Re: [Homebrew_PCBs] Re: HP Laserjet 4P darker printout
2008-01-27 by ali pala
Try a clean up inside the Laser Scanner Assy. pay attention to the mirror. P wrote: I was already
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist
2008-01-27 by Markus Zingg
Just as a note, you don t need a UV-LED based box for the resist. I used it for years with an exposure box using UV tubes. The advantage of UV LEDs over tubes
Re: Small Quntities of Dry Film Resist
2008-01-27 by javaguy11111
Sorry, I forgot to mention that. It is 12 inches wide. I bought it from think tink, so you can go to their site for information on how to apply it. There are
Re: [Homebrew_PCBs] Re: Small Quntities of Dry Film Resist
2008-01-27 by Bill Maxwell
Hi Damon 5feet long but how wide is it and , briefly, how is it applied please. Bill
Re: Small Quntities of Dry Film Resist
2008-01-27 by javaguy11111
The photoresist is ready for shipping. It is 5 feet long and was cut off from a 100ft roll that I purchased from ThinkTink. I have 18 rolls available and 4
Re: HP Laserjet 4P darker printout
2008-01-26 by P
I was already afraid that a hardware solution would be missing..... Is someone here using a Laserjet 4 to do his artwork? I m using a white label toner so I
Re: [Homebrew_PCBs] Re: HP Laserjet 4P darker printout
2008-01-26 by Stefan Trethan
Download the manual and see if such a pot exists. The IIID had one (green), and i believe at least one newer model still had it. Later they decided users are
Re: HP Laserjet 4P darker printout
2008-01-26 by P
Thanks for your replies. I didn t find any settings in the driver to increase the toner amount. All the settings on the printermenu and driver are set to the
Re: [Homebrew_PCBs] HP Laserjet 4P darker printout
2008-01-26 by Leon
... From: P To: Sent: Friday, January 25, 2008 4:29 PM Subject: [Homebrew_PCBs] HP Laserjet 4P
Re: [Homebrew_PCBs] HP Laserjet 4P darker printout
2008-01-26 by Harvey White
... Check all the replaceable bits and pieces and see if they re clean. On most HP printers, the drum and toner are one unit, so you should have gotten a good
HP Laserjet 4P darker printout
2008-01-25 by P
Hello all, I have a question : I recently bought a secondhand Laserjet 4P to make my own artwork. Besides the fact that the printer doesn t print that black
Re: Small Quntities of Dry Film Resist
2008-01-25 by javaguy11111
Just an update. I have received the resist and shipping materials. I decided to use USPS instead of UPS because I have had more requests for it. I will also be
Re: [Homebrew_PCBs] Safety Question X Carbon Monoxid e & Homebrew PCB
2008-01-24 by Leon
... From: Marko Pavlin To: Sent: Thursday, January 24, 2008 4:28 PM Subject: Re: [Homebrew_PCBs] Safety Question
Re: Safety Question X Carbon Monoxid e & Homebrew PCB
2008-01-24 by jurod81
Although I agree that nothing in the PCB manufacturing should give off CO, other things such as soldering with rosin flux can give off CO and many other
Re: Safety Question Carbon Monoxide & Homebrew PCB
2008-01-24 by ed.slatt
Thanks for all of the feedback - I now have a plan.. This is a great group! Ed
Re: [Homebrew_PCBs] Safety Question X Carbon Monoxid e & Homebrew PCB
2008-01-24 by Marko Pavlin
It s not neccessary a carbon (monoxide), which can trigger the CO sensor. They are cross-sensitive to hydrogen, which is intensively produced by chemical
Re: [Homebrew_PCBs] Safety Question Carbon Monoxid e & Homebrew PCB
2008-01-24 by Herbert E. Plett
No part of a PCB manufacturing contains carbon, so it s unlikely that CO can be produced other than by burning something. The only burning you mention are the
Re: [Homebrew_PCBs] Safety Questio n – Carbon Monoxid e & Homebrew PCB
2008-01-23 by Stefan Trethan
This happens when you use way too high concentrations of HCl or both. If the CuCl etchant is maintained at normal levels, and covered when not in use, there is
Re: [Homebrew_PCBs] Safety Question – Carbon Monoxid e & Homebrew PCB
2008-01-23 by kevinmwolf@aol.com
Ed, I have experienced some weird situations when using Muriatic acid and hydrogen peroxide to etch. The first couple of times I etched, EVERYTHING metal in
RE: [Homebrew _PCBs] Safety Question Carbon Monoxide & Homebrew PC B
2008-01-23 by toftat@cowshed.us
if the furnace is not at fault, try looking for leaks at the garage door, CO is one of the many nasties produced by your automobile... It sounds like you have
Re: [Homebrew_PCBs] Safety Questio n – Carbon Monoxide & Homebrew PCB
2008-01-23 by Stefan Trethan
Hi, since we don t know your exact process we can t say for sure, but it s highly unlikely. As i understand it, to get CO you need to oxidise some fuel
RE: [Homebrew_PCBs] Safety Question – Carbon Monoxid e & Homebrew PCB
2008-01-23 by James Reed
Ed, Have a Heater-Air professional inspect your furnace. If there s a crack in the heat exchanger, or a venting problem, CO2 can build in the house. ...
Re: Safety Question Carbon Monoxide & Homebrew PCB
2008-01-23 by Jawa Lunk
Don t play around with that. A phone call to the NG company and they will be there within an hour. And they have highly sensitive equipment that will be able
Safety Question Carbon Monoxide & Homebrew PCB
2008-01-23 by ed.slatt
Hello, Do any of the basic homebrew PCB processes put off Carbon Monoxide? Do any of the processes put of any chemical that can trick/damage CO detectors? My
OT:Flexible PCB's
2008-01-23 by multidigital15
Hi All, Sorry for the Off topic. I wonder if anyone knows the cost o a flexible PCB strip of abou 30cm by 1cm. This is only to interconnect a few components to
The New Guy
2008-01-22 by Jawa Lunk
Greetings... QUICK INTRODUCTION: I run and maintain a website and group of nearly 500 members who build 1:1 scale robots from movies. I am currently part of a