etching gainclone pcb - Page 4 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 15th October 2012, 01:26 AM   #31
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Quote:
Originally Posted by patnaik_kottakki View Post
Hello friends and gurus,Iam new here. Can any one say where i can get pcb clads for my projects. Iam staying in south India, Andhra pradesh. Please sirs Iam in need of it mostly. If any one of u sent me in corrier I can pay. Please help.
patnaik_kottakki,

Hopefully, someone from your area will post here with more-suitable information for you. But you could try on line:

ebay.com - search for "FR4". (Maybe try google.com: "India FR4".)

You could also look at mouser.com, and many other similar electronic component distributors.

Cheers,

Tom
  Reply With Quote
Old 15th October 2012, 06:40 PM   #32
diyAudio Member
 
Join Date: Nov 2009
If you are good at freehand drawing you can easily trace the PCB layout on the copper clad laminate using a OHP aka permanent marker. A Fabre castell or Luxor one will do. I have etched even elaborate PCBs using this method. A ruler and a stencil will be helpful for shaky hands. After completing the drawing just immerse in etching solution.

No toner transfer or photoresist methods required especially in the small pcbs used for chip amps. One case also try using adhesive tape, ruler and a paper cutter.
  Reply With Quote
Old 16th October 2012, 06:47 PM   #33
diyAudio Member
 
Join Date: Apr 2011
Location: Kolkata
I am from Kolkata. You can email me for any details. I will try to help you.

Thanks
Subhadeep
paku5535 at gmail dot com

Last edited by Mooly; 17th October 2012 at 11:09 AM. Reason: email address removed
  Reply With Quote
Old 17th October 2012, 10:17 AM   #34
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
To do what AVbuilder suggests , it will be a good idea to print the design on a paper ( copper side) and place it on the bare pcb and drill all the holes. Then remove the paper and paint up all the tracks and pads. If you have a reasonably steady hand this isn't hard to do.

If you can't get your OHP marker you can also use nail polish and use a nail polish thinner ( or amyl acetate) to thin the nail polish. Use a fine tipped brush to apply. Can't get one fine enough ? Just get the thinnest and trim it to size ! A good OHP marker is easiest but better check if the type you get is really resistant to the etching process. A small test pcb would tell you. With the OHP ink you might need to go over the tracks two or three times to ensure that enough ink has been applied.

NC paint thinner will also dissolve the nail polish but amyl acetate evaporates more slowly and so you get more time to apply before the nail polish starts to get too thick again.
__________________
AM

Last edited by ashok; 17th October 2012 at 10:19 AM.
  Reply With Quote
Old 17th October 2012, 11:03 AM   #35
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
amyl acetate was easy to google. Melting to boiling range ~ 220C degrees, that's quite big. The 149 boiling point explains why it evaporates more slowly.

NC paint thinner not so obvious. Almost all search results came from India, I wonder why.
Turns out NC probably = nitro cellulose
__________________
regards Andrew T.
  Reply With Quote
Old 17th October 2012, 11:22 AM   #36
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
NC paint is nitrocellulose based paint used on cars etc. Shiny and quick drying.
So NC thinner is what they call the solvent over here. No idea what it is made up of. Evaporates quite fast.
__________________
AM
  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
Etching PCB:s Loial Parts 105 12th April 2012 03:22 AM
Calculations for PCB etching solution. juma Parts 24 18th December 2006 08:43 PM
Problem with etching PCB!!! Please help! safetyman Parts 20 16th May 2006 05:35 PM
ENX bulb for PCB etching? Stocker Everything Else 0 6th May 2006 02:22 AM
Etching 4oz PCB boards kiwi_abroad Parts 4 28th June 2003 09:09 PM


New To Site? Need Help?

All times are GMT. The time now is 04:33 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