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AirGradient Forum

O-1PST v1.3 technical documentation

Components
#1

I have purchased, just received and built my O-1PST. I have a couple of questions which I can’t find answers to by myself:

  1. The documentation on the website has PCB schematics for version 1.1 of the PCB. What I have received is V1.3. In particular I see that the area around IO breakouts has changed substantially and is now using the same type of connector as the PM module. I was planning to utilize these pins in my build (good thing I did not order a PCB yet…), so an up-to date kicad project would be much appreciated – so can I triple check the layout and plans;
  2. Additionally it seems like the power regulator has changed from LM1117-3.3 to AMS1117-3.3: a welcome change, as I definitely get deep negative temperatures in my region that would’ve been well out of spec for the regular LM1117;
  3. Am I right that the IO extension is now a Molex PicoBlade connector with a 1.25mm pitch?
#2

This link has an area for the 1.3 board and kicad files
https://www.airgradient.com/documentation/overview/

1 Like
#3

So the unfortunate part is that the link for v1.3’s KiCad files is leading to https://www.airgradient.com/documents/gerber/openair-v11-kicad.zip (note the v11 in the link) and inside is the project for v1.1, rather than v1.3! My best guess for a correct link at https://www.airgradient.com/documents/gerber/openair-v13-kicad.zip is unfortunately a 404.

No wonder I got confused!

@Achim_AirGradient Any chance you could get the link updated for the v1.3 outdoor PCB?

#4

Yes, we are working on it. I just added the SHT and SGP modules.
Open Air v. 1.3 and CO2 module should come soon. Sorry for the delay.

#5

So I have downloaded the v1.3 files and I see that the schematic still refers to the power regulator as LM1117-3.3, rather than AMS1117-3.3 that I have on the board.

This makes me wary about the identification of the connectors/plugs I have on board so I would love if somebody could confirm whether I/O extension connector is indeed a Molex PicoBlade or a JST with a 1.25mm pitch?