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MS05000 Budget Logic Analyzer Probe Set Design

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Gandalf_Sr:
I have ordered some spare PCBs so, even if you didn't contact me before, PM me and tell me what you need.  I'm suggesting $20 to cover costs plus shipping and handling for one set which I define as... 1 x Connector PCB and 3 x Probe PCBs (so you could build 2 x 3.3V probe PCBs and 1 x 5.0V probe PCB - the PCB is the same for both voltage variants).

I also ordered enough components to build 5 Connector PCBs, 8 x 3.3V PCBs, and 2 x 5.5V PCBs and I may build some up because, well, Coronavirus lockdown.

Gandalf_Sr:
Here's an update.

The PCBs are in production now, the 4-layer Connector PCB is stated as 8 days to build (the Probe PCB is 6 days) and I paid for DHL shipping so I'm estimating April 6 for the boards to arrive with me.  They are blue soldermask with white silkscreen and ENIG (gold plated) finish - i.e. lead free.

Both the Connector and Probe PCB have a few components on the underside.  This was done with the assumption that they would be hand-built so apologies to those intending to make solder screens.  The Connector PCB has 1 x 1210 component on the underside and the Probe PCB has about 9 resistors and 1 capacitor, all 0603, on the underside.  I think it would compromise signal integrity if I tried to put all components on one side for the boards; I have tried hard to have signal lines running with nothing but a clean ground plane on the next adjacent layer.

I will do a full write up on hand-assembly with tips.

Gandalf_Sr:
OK, I'm getting multiple requests for PCBs via PM which is fine but I need to clarify and simplify things for you guys and me.

There's only 1 Probe PCB design, you put slightly different components on it (e.g. an LVC voltage level translator) to make it into a 5.5V version vs a 3.3V version.  The voltage range that each version will handle is as follows:

3.3V version handles logic Vcc voltages of 0.65V to 3.6V (absolute maximum Vcc is 3.6V and a '1' can be Vcc+0.2V max)
5.5V version handles logic Vcc voltages of 1.65V to 5.5V (absolute maximum Vcc is 6.5V and a '1' can be Vcc+0.5V max)

There is only 1 Connector PCB design; it has no active components but is 4-layer to handle the LVDS signals as well as possible

To have a complete setup to analyze 16 channels you would need 1 x Connector PCB and 2 x Probe PCBs, these are bare PCBs and you will need to buy and solder the components to them (see post above with Digikey cart links). You also need ribbon cables to connect the Probe boards to the Connector PCB and these are included in the BOM/cart link for the Connector PCB (note 2 x 6 inch and 2 x 18 inch cables are in the BOM, unless you want both, you should remove one pair to save cost).

So I've been asked for various combinations of PCBs so I need to set some standards... I have defined a 'SET' as 1 Connector PCB and 3 Probe PCBs - Why 3 you ask?  Because, if you mainly work with 3.3V and low voltage logic, you could build 2 x 3.3V Probe PCBs and be able to run 16 channels at low voltages e.g. 1V plus you could build 1 x 5.5V Probe PCB and mix that in when you wanted to analyze 5.5V logic.  If you really want to, you can build 2 x 3.3V and 2 x 5.5V Probe PCBs giving you the ability to analyze 16 channels at any voltage within specification so I have defined a SET+1 which is 1 x Connector PCB and 4 x Probe PCBs but, for most people, I suspect that 3 Probe PCBs is fine.

So here's what you can ask me for...
A SET =  1 x Connector PCB (the one that plugs into the scope) 3 x Probe PCBs (the ones that have all the ICs on them)
A SET+1 = a SET + 1 extra Probe PCB

I am not trying to make a business out of this, it's a sort of Covid-19 project that killed time for me (lots of time) and I'm already $100s out of pocket with orders for prototypes, shipping, components etc.

I will sell a SET for $20US shipped to the USA. I will sell a SET+1 for $25US shipped to the USA.  You can also buy the following multiples:
Two SETs
Two SET+1s
One SET and one SET+1

And I will reduce cost by $7US for the combined shipping e.g. two SETs will be $20+$20-$7=$33.  If you want more/different than these offerings, please PM me and I will try to help.

I will ship overseas but it will be the actual cost of shipping + cost of PCB sets required and, if there's no tracking, it will be sent at your risk.  In the US I will use Priority Mail which come with a standard $50 insurance coverage.

PM me what you want and I will respond with cost estimate and PayPal info.  I do not expect to receive the PCBs from the manufacturers until around April 6th.

Gandalf_Sr:
I spotted errors in the Probe PCB Digikey saved carts which I've corrected in the previous link, the biggest error is that there were 2 x U5s LDOs.  The LT3060 is expensive but it's one of the few LDOs I could find that went down to 0.6V output.

Some here have asked for the stencil files for the new PCBs so they are attached below.

electricMN:

--- Quote from: Gandalf_Sr on March 23, 2020, 05:25:31 pm ---I spotted errors in the Probe PCB Digikey saved carts which I've corrected in the previous link, the biggest error is that there were 2 x U5s LDOs.  The LT3060 is expensive but it's one of the few LDOs I could find that went down to 0.6V output.

Some here have asked for the stencil files for the new PCBs so they are attached below.

--- End quote ---

Shouldn't item 6 in the connector board cart be a right angle connector? I believe this is the connector that plugs into the MSO5000 LA port. Or am I mistaken?

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