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Old 20th April 2006, 01:05 PM   #1
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Default smd soldering problems

Hello guys,
I have buyed few adapters from Browndog (p/n 031102) for soldering cs8414 to make it fit into dip28 on pcb.... The problem is that cs8414 is smaller than i can solder with my soldering iron and i can't be sure that i have soldered everyhting good....

question....does anyone know if somebody is offering soldered cs8414 on adapters to fit dip28 on a reasonable price....
thanks in advance and best regards
daniel
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Old 20th April 2006, 01:11 PM   #2
anatech is offline anatech  Canada
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Hi Daniel,
Time for chemical help! Not recreational, but rather solder flux.

Clean the area with lacquer thinner and a cotton swab. Pick up some liquid solder flux similar to MG Chemicals # 835-100mL (in my case). Put a little across the pins and resolder.

You will find that the solder will wet the pins nicely and not "blob" across. Remove excess solder with solder wick. Clean again as above. If you centered the chip the result should be a "factory" looking job. You will get better with practice.
-Chris
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Old 20th April 2006, 01:52 PM   #3
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thnx anatech.....the problem is that i can't be sure that the part is soldered good - i need to be really sure that it is o.k. .....that is why i wanted to find some dealer that might sold me soldered part on a adapter.....

thanks for the tip about soldering..... i will try it ....but i am still looking for a seller that might have those soldered adapters
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Old 20th April 2006, 02:04 PM   #4
poobah is offline poobah  United States
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Sparkle,

Anatech is right on the money. You need to have an adundant amount of liquid flux. You won't believe the results until you try it.

Kester makes handy little pens for fluxing down your work. $2...

Google "drag soldering" and learn about that.
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Old 20th April 2006, 02:13 PM   #5
anatech is offline anatech  Canada
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Hi Daniel,
Okay, you really forced me to admit to this. I used to use a magnifying glass. Now I use my reading glasses (arrrgh!) and a magnifying glass.

Okay, so I'm going blind! But if I can see it, so can you!

-Chris

Edit: poobah, does the smell of burning hair ever interrupt your work ??
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Old 20th April 2006, 02:19 PM   #6
poobah is offline poobah  United States
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Got hair?



I though I'd never be able to solder this SMT stuff... gotten pretty good at it lately,

Even if your eyes are perfect... go and buy some 2.5 or 3.5 reading glasses. You'll walk into walls and stuff if you're not careful. But they are a must for doing SMT work.
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Old 20th April 2006, 02:29 PM   #7
AuroraB is offline AuroraB  Norway
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Location: Norway, -north of the moral circle..
Flux is the clue, even if you use fine tips..
as of the glasses - I am totally addicted to these ones..
works marvels for old geesers..
You can even have your regular glases out on the nose tip!
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Old 20th April 2006, 02:59 PM   #8
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It really is suprising how nimble you can be under magnification. I thought that motor coordination would be 10x more difficult under 10x magnification, but you acclimate to it suprisingly fast.

I discovered something kinda neat a while back. Under a microscope and using a very fine needle you can manipulate soft metals like gold and lead almost like clay. It really gives you a different sense of the material.
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Old 20th April 2006, 04:51 PM   #9
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woohhhaaaa.....
so many responses - and so encouraging.....well, i will give a try guys.....since you are all persistante .... i will find liquid flux and try to do the job....yes i will..... since you all can do that i can do that too..... fine tipped soldering iron and liquid flux.....

o.k. - will let you know the results..... when i do that..... would be this weekend probably
thanks guys for your help .... it is good that there are so many of us with so much experiences...
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Old 20th April 2006, 04:57 PM   #10
anatech is offline anatech  Canada
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Hi Daniel,
Did I mention that I find a wide tip easier to deal with? My best tip is 3.5 mm. The reason is that it doesn't cool off when soldering and I can set the temperature lower as a result. The solder flows nicely.

I am assuming you have a controlled temperature station?

Desoldering I can do three pins at a time. Shields come off easier too.

-Chris
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