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MS05000 Budget Logic Analyzer Probe Set Design

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mtnzap73:
Well that was not a popular question. After a bunch of research I can see why. I took some advice I read in this forum to stick with single function solder tools. I have learned that lesson for other things so it is good that I realized it again.

I am about to do the DK order. Based on the experience of others, are there any specific parts in the BoM that perhaps should be increased in quantity to serve as spares for soldering errors, etc.?

Thanks.

knapik:

--- Quote from: mtnzap73 on September 25, 2020, 07:22:40 pm ---I am late to the party, but have a soldering question.
I read all I could find in the threads above re flux, soldering advice.
But, I did not see anything about using solder paste, and an air solder station.
They are not too expensive, and are made for SM obviously.
It even seems that DK's price for an Aoyue 852 is well less than Amazon.
Isn't this a fine justification for another cool tool? Just slip it into the DK order ...

--- End quote ---

I hand soldered mine, but made a couple of mistakes where I had to bring out a hot air station to fix. If you ever plan to do more SMD repairs, a hot air station is a good idea. No comments on that specific hot air station though.

Gandalf_Sr:
I own a hot air rework but I see it as a tool to take multi-legged parts off a PCB, not put them on. I use a T12 K tip to solder pins individually under a microscope and then solder wick to remove excess solder.

To put down my parts, I no-clean flux the pads and then use thin solder to put solder onto 1 pad, choose one that is connected to a track not one that is unconnected, and avoid a ground pin as you'll need more heat/time.  Then I carefully position the IC with tweezers under the microscope - the plan view should be correct, the IC will be sitting high with the pin resting on the soldered pad - and heat that one pre-soldered pad until the IC drops down to sit flush with the PCB - use the lightest touch possible with the tweezers, forcing the IC around will risk pulling the pad off the PCB. Once I'm happy with the IC position, I go in and solder one pad on the opposite side; again make sure the IC is aligned. Now, go back and solder the remaining pads.  If there are bridged pins or too much solder, I take a piece of thin solder wick which I pre-wet with no-clean flux to creep up un 3 or 4 pads at once, what happens is that the wick gets a load of solder in it and it then acts as a reservoir to add/subtract solder from multiple pins at once.

This approach has been very successful for ICs with pitches down to 0.5 mm and 0603 size discretes.  My design deliberately does not go lower than these sizes to make it hand-buildable.

mtnzap73:
I received my boards recently!
Now for the easy part.

Thanks again Gandalf_Sr.

Gandalf_Sr:

--- Quote from: mtnzap73 on November 12, 2020, 03:42:44 am ---I received my boards recently!
Now for the easy part.

Thanks again Gandalf_Sr.

--- End quote ---
You're welcome mtnzap, post some pictures when you get them done.

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