PST - Mechanical Design?

scottiebabe said:

have you given any though to what your PST tool might look like

not really. The only measure we deliberately took, was to not use the PICO pin names in the SCPI commands.
So that users don't have to label the case outputs 29, 22, 15, ...., but can use digital out 0..3, Analog in 0..2, Analog hires 0..3, etc.
That little pcb could actually host an ADS1115 + 2 pullups and a decoupler cap ....

scottiebabe said:

I bought some Hammond 1551K enclosures awhile back for a Pico project.

Looks nice and small. And available across the globe.

I love it when a plan comes together, a 3 dollar case and a scrap of perfboard is all that is needed

That was my ulterior motive a generic ADS1115 sampling board. Just enough room for 4 inputs + ground.

I plan to buy one of the AD5592 PMODs in the future

I like that it has more inputs and the parallel connector placement.

I am hoping the ADS1115 won't be fused seeing digital signals on unused inputs. I am fairly confined the GPIOs on the RP20240 will go high enough impedance to be negligible compared to the input impedance of the ADS1115. So, I can connect them in parallel and use which ever I like on a low pole count terminal block. 

Your PST might look more like a traditional USB DAQ

If you use a right angle pluggable terminal block header on the PCB inside the enclosure

then you can use a pluggable terminal block screw terminal block outside the case

Allows you to easily swap connectors or access the terminal screws on the outside.

I totally agree but for the scottiebabe cheapskate edition its going to be the cheapest screw terminal possible (not even rising cage clamp lol)

You will have to holdout for the JC signature luxury edition on tindie for $100.

But yes, those pluggable terminals are really nice

You can get samples from some manufacturers.

If you are interested, I have some left over phoenix connectors, which are 0.15" or 3.81mm spacing, 10 positions (1803358 and 1803659), that you might be able to carefully cut down to your desired width.  I would gladly send you a couple of pairs for the cost of postage. These are left over pieces that I found for super cheap on ebay years ago.

Will they have Swarovski crystals on them though ?

https://www.neutrik.com/en/neutrik/products/xlr-connectors/xlr-cable-connectors/crystalcon

 scottiebabe I have two different 5-pin plugs.  No right angle plugs though.  Recoverd from who-remembers-what.  Send me your address and I'll send them to you.

I am as bad as the no-name widget factories, I now have a PST before there is even a PST...

I am still waiting on some more ads1115 modules, so its not totally done...

Thanks JC for bringing this project to life, I think its pretty neat!