PCB Home Making Questions - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st October 2005, 11:24 PM   #1
diyAudio Member
 
Join Date: Jul 2004
Location: Romania
Default PCB Home Making Questions

Hy,

I wonder what type of tube can I use to expose PCBs.I have a blacklight tube Philips tld 18w/08 (this is the one sold for money fake detection, disco & other technical or hobby stuff). Some people say this is not right for the exposing job other say that it does the job veryy well.I dont know what to think of.
Spectral range is around 400 nm UV-A & some UV-B which does match with the needs of a photoresist board

What do u think about it?

What is the diference between blacklight & blacklight blue?

Best regards, Adrian
  Reply With Quote
Old 1st November 2005, 05:15 AM   #2
diyAudio Member
 
TwoSpoons's Avatar
 
Join Date: Oct 2004
Try sunlight. Its free, and its enough of a point source to give you really sharp lines.

Or try a UV tanning lamp.
  Reply With Quote
Old 1st November 2005, 08:49 PM   #3
diyAudio Member
 
Join Date: Jul 2004
Location: Romania
I'm in an area where sun is not so active until spring i mean next year.What should I do,I'll wait until then...

C'mon sun rays is out of the question..

What would be the alternative?
I mean what kind of tubes should I use; models, brands

Any sugestion?

Best regards, Adrian
  Reply With Quote
Old 1st November 2005, 09:10 PM   #4
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
You can use an ordinary fluorescent lamp -- I use a "slide viewer" (one of those light tables on which you place 35mm slides for viewing) it's fluorescent only puts out a few watts -- expose 8 minutes.

if you have a photo/darkroom enthusiast friend you can use a density step wedge to ascertain the proper exposure time. the density curve of pcb material is very sharp, once you standardize on a board material supplier, developer solution and exposure time the rest is just shake and bake.
  Reply With Quote
Old 1st November 2005, 09:29 PM   #5
mzzj is offline mzzj  Finland
diyAudio Member
 
Join Date: Jul 2005
Location: 65N 25E
Quote:
Originally posted by TwoSpoons
Try sunlight. Its free, and its enough of a point source to give you really sharp lines.

You must be teasing us. Maybe works on some damn Waiuku but not much hope here, almost at polar circle. 24hours darkness at this time of winter and in summertime you always get over-exposure

  Reply With Quote
Old 1st November 2005, 10:01 PM   #6
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Quote:
Originally posted by TwoSpoons
Try sunlight. Its free, and its enough of a point source to give you really sharp lines.

Or try a UV tanning lamp.
Maybe in Australia where sunscreen is a permenant wear item I bought proper UV tubes from an electronics supplier (RS Components) they weren't all that much.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Questions for DIY home Subwoofers SunnYii Subwoofers 10 23rd May 2007 11:26 PM
Questions about making Cat5 speaker cable wixy Everything Else 1 10th March 2007 06:57 AM
questions about home theater dsantamassino Everything Else 5 12th October 2004 07:58 AM
Making home stereo, cheap power + quality??? da_madaxeman Solid State 18 21st August 2003 12:01 PM


New To Site? Need Help?

All times are GMT. The time now is 08:19 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2