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PICList Thread
'[EE] Low-corrosion/oxidation solder'
2012\01\20@234115 by PICdude

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Hi all,

I'm making a quick-and-dirty connector/contact that would connect a  wire to an existing PCB pad (~3/8" x 1/4").  I've reduced the design  to having another small piece of PCB touch the existing PCB pad, and  at first I thought I'd wrap a piece of wire around the new PCB (such  that the wire would touch the existing pad), but now thinking I can  use a pad on the new PCB with a blob of solder on it to touch the  existing pad.

Should I worry about oxidation?  IIRC some bulb holders used solder as  a contact and that works fine.  This is a non-critical connection.   Otherwise, is there a better solder I can use?  Gold plating would not  be easy/viable.  This page ( http://en.wikipedia.org/wiki/Solder )  says that Sn63PbP is used for HASL, but I don't know where I can find  this in wire form or low volume.

Alternatively, I can put a couple holes on the new PCB and solder a  solid wire across it, such that that solid wire would be the contact.   But a blob of solder would be much easier, and I need to make a few  dozen of these.

I need the blob of solder, wire, or other to be about 0.01" to 0.03"  thick, and I can't find any test-points low-profile enough.

Any other thoughts?

Cheers,
-Neil.

2012\01\21@001427 by YES NOPE9

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If reliability is key , use some gold plated scrap.
You could use gold plated pins , or pieces of gold-plated pcb
or pieces out of a gold plated connector.
Otherwise, solder is fine.  You can use silver solder which is easy to get.
99guspuppet


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2012\01\21@091222 by PICdude

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I'll be making the small PCB's (actually having them made), so there's  no scrap to use.  The pieces of the gold-plated connector sounds nice,  but that's what I'm looking for -- something I can get from  Digikey/Mouser that I can pull the connectors out of.



Quoting YES NOPE9 <spam_OUTyesTakeThisOuTspamnope9.com>:

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2012\01\21@135902 by YES NOPE9

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How many are you making ? A few dozen ?  If a limited number, I can mail you some connectors.
gus

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