MS05000 Budget Logic Analyzer Probe Set Design

[NoisyBoy]

Gandalr_Sr,

Just used your model for the 3D case printing, it worked perfectly.  I use the case to color code the boards, orange (caution) for the 3.3V, and green for the 5V. 

Thanks again for all the hard work you put into the probes.

[Gandalf_Sr]

Noisy_Boy,

They look great   Thanks for posting the pictures.

[tv84]

Gandalf_Sr, I almost cried... 

[Gandalf_Sr]

Ho Lee Fook!  I sent that package to you on April 15th, that's 4 days short of 4 months!

Happy that it actually arrived though.

[0xde4dbeef]

Ho Lee Fook!  I sent that package to you on April 15th, that's 4 days short of 4 months!

Happy that it actually arrived though.

Dang, that means there's still hope for mine to arrive! Seems they should be here in about 3 weeks then   

[Gandalf_Sr]

Sorry man 

Although it was posted at the height of the Covid 19 pandemic plus the USPS is struggling under bad 'leadership'.

[0xde4dbeef]

Not your fault mate! Apparently it's significantly faster to get stuff from china to europe than from the US, but let's not get political in here.
Got the parts ready and look forward to getting the boards and build them, I'm not in a rush. Would've gotten the original ones then 

[Gandalf_Sr]

Not your fault mate! Apparently it's significantly faster to get stuff from china to europe than from the US, but let's not get political in here.
Got the parts ready and look forward to getting the boards and build them, I'm not in a rush. Would've gotten the original ones then 

Thanks but if it doesn't arrive soon(ish) let's discuss sending you another set.

[0xde4dbeef]

So they arrived today! 
By the day 4 months!  But they are here! Now going to find out if I managed to order all and the correct parts 

[tv84]

So they arrived today! 

  I was not last!!!

[Gandalf_Sr]

I just posted a SET to France, I wonder how long that will take?  International shipping has become a joke these days.

[Gandalf_Sr]

A member has contacted me about a SET of boards that he wants to adapt to an MSO1000Z like an RPL116.  I went back and looked at this thread but it's not clear to me whether the output of my chips will drive into an MSO1000Z, will it?  Do I need terminating resistors?

He's talking about using a ribbon cable to adapt from my setup but the neatest solution would be for me to create a variation of the connector PCB.  Anyone interested in that?

[cstereo]

PCB posted in the US on September 9th and received today in France after only 1 week !

Thank you again for your time.

[Gandalf_Sr]

PCB posted in the US on September 9th and received today in France after only 1 week !

Thank you again for your time.

You are welcome, hope they work out well for you.

[mtnzap73]

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 ...

[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]

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 ...

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]

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

Thanks again Gandalf_Sr.

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

[S. Petrukhin]

I use a T12 K tip to solder pins individually under a microscope and then solder wick to remove excess solder.

I use T12 KU tip for 0603 and 0.5mm pitch - if you wipe off the solder on a wet sponge, it will drink all the jumpers, I have never to use solder wick while soldering. Just an extra drop of fresh flux.

I bought BCM2 a long time ago, but I haven't tried it yet. Just tomorrow I will try to solder them chips 0.5 mm pitch.
If it doesn't work out, good old KU will fix it. 

[fjalvingh]

@gandalf_sr Very late to the party but- would it be possible to get those boards still?

[Gandalf_Sr]

@gandalf_sr Very late to the party but- would it be possible to get those boards still?

Yes, I still have some boards left. PM me.

[Gandalf_Sr]

Here in Washtenaw County, Michigan, USA, the Covid 19 virus is running rampant; we know 3 people who have (or have had) it, and Michigan has just gone into strict lockdown again with all bars and restaurants closed.

I've had a couple of requests recently for PCBs from non US people.  I have sent overseas before but, for now, I need to restrict to US mailings only because, to send overseas, I have to stand in line at the Post Office and fill in a customs form which I am unwilling to do for obvious reasons.

I will still ship to the USA because, when shipping to the US, I can print shipping and put in my mailbox for outgoing collection (as long as my shipping supplies last).

Thanks for your understanding.

[S. Petrukhin]

Friends, who really need a probe for a logic analyzer, you can use my simplified version - it is very cheap and affordable, you can order boards for $2 on JLCBCB and components for $18 on LCSC.

Sir Gandalf_Sr made a very important and decisive contribution to the development of this option, and this is also his work.