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Old 24th January 2011, 05:40 AM   #31
viki_v2 is offline viki_v2  India
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Roushon Very nice explanation,

But Think what would happen of a new diyer if he were to read this to make his 1st pcb.
The very first time i went through such things reading forums, i used to scrah my head thinking if it was some big technology.

Another thing have you had any experience with photo resist film for pcb, I want to get some more and am thinking of group buy. Lets see
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Old 24th January 2011, 05:44 AM   #32
viki_v2 is offline viki_v2  India
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For heater you can use water pumps used in small house hold fountains, You can get some which just throw hot air. I have seen it some where on other forum but dont seem to remember.

But if u use hcl+ Hydrogen peroxide =No heating Very clean and clear solution ,very fast etching. You can allways have a peek on haow much has been etched. And best of all it environmental friendly. While for ferric chloride you have to think where to dispose it
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Old 24th January 2011, 05:53 AM   #33
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".......ferric chloride solution ....."
A really disgusting solution. Stains and eats away anything like clothes flooring etc. Did a lot of damage around my house over the years.

You can use Hydrogen Peroxide and Hydrochloric acid which is easily available.
Hydrogen peroxide can be bought at any pharmacy and the HCl is avaiable as ( acid) floor cleaning liquid at any supermarket or even the small corner store.

Two parts Hydrogen Peroxide to 1 part HCL. Just be careful of the HCl fumes, they are corrosive. So do it in a well ventillated place and away from any exposed metal parts that might corrode. Etching is VERY fast. Probably under 2 minutes if its fresh and the chemicals are good.
Google it for more information.

Note : Both the HCl and the Hydrogen Peroxide ( bought at the pharmacy) are already dilute solutions. So you do not need to dilute them more.
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Old 24th January 2011, 09:24 AM   #34
Roushon is offline Roushon  India
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Default Thanks!

Thanks! Viki and Ashok for suggesting use of Hcl plus
H2O2. I know these are available in lohar chawl area in
Mumbai. I will definitely switch to this option. Ferric Chloride is really bad.

But you said two different proportions:

Viki: Hcl:H2O2=2:1
Ashok: Hcl:H2O2=1:2

Which one is correct?

Regarding Toroidal I gave two manufacturer addresses
in post no 3 of this thread. Both are in Lamington road
and quite responsible and good. Could be slow
but we do not have to pay postal charge. Have got
few toroidal done by them. Very good.

Viki, I will be interested in photo resist film and would like
to try. But I have now mastered the toner transfer
method and make pcb quite fast. The explanation
is long but once someone does once or twice
then it is pretty routine like any other thing.

Regards
Roushon.
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Old 24th January 2011, 11:17 AM   #35
viki_v2 is offline viki_v2  India
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oops i made mistake it seems .
Proportions by ashok are correct.
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Old 24th January 2011, 01:21 PM   #36
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etchapcb - elecprojects
http://sfprime.net/pcb-etching/index.htm
http://www.bobthebartender.org/temp/...structions.pdf

Friends, Pls no hard feelings. but I would request you all if we can start dedicated thread on pcb making.

so we can keep this as a dedicated thread for parts in mumbai. The benefit would be when ever we need contact details of any dealer for any part. we easily get it.
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Last edited by Aucosticraft; 24th January 2011 at 01:28 PM.
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Old 24th January 2011, 01:38 PM   #37
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hi
greetings for designing pcb easisest software SPRINT_LAYOUT 5.0
THANKING YOU
ANDREWLEBON
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Old 24th January 2011, 02:23 PM   #38
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"......Friends, Pls no hard feelings. but I would request you all if we can start dedicated thread on pcb making....."


There are enough threads on this topic already. Do a search on this forum and if you want , do one on Google also. Plenty of information already there.
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Old 24th January 2011, 02:47 PM   #39
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Quote:
Originally Posted by ashok View Post
There are enough threads on this topic already. Do a search on this forum and if you want , do one on Google also. Plenty of information already there.
Yes Ashok Ji, I know, All I was saying is, keep discussions connected to topic. that would be good for all of us and finding the required parts and dealers easily. I really appreciate the efforts put by Roushon and other members.
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Old 24th January 2011, 03:43 PM   #40
Roushon is offline Roushon  India
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Thanks Aucosticraft! I also would like to maintain this thread to give
information and address of sources of parts related to electronics.
This is the reason I started this
thread. We are maintaining the rule even when we described pcb making.
We gave some addresses of sources of materials related to pcb making. Next
I will put the details address of the chromo paper dealer in a few days and
also the details of how to obtain it. PCB is an integral part of this hobby.

I am still waiting for the post with the address where I can find silver solder.
Also I need silver wire. If any of you know.

N.B. I know I went little bit far in describing the pcb making by toner transfer (this
was done in a flow) , but I hope that will encourage some new comers with this
handy method and sources of materials which are available here.

Regards
Roushon.
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Last edited by Roushon; 24th January 2011 at 03:58 PM.
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