If you want to see some screenshots of the 128x64 OLED in action: GitHub - bablokb/circuitpython-vameter: A Voltage/Current Meter implemented in CircuitPython using an INA219. Scroll down to see various images.
The display is small, but very sharp. Four lines will work if you are near enough. I also have an image of the 128x32 OLED that @nox recommended, I use it in my rack. Let me know if I should post it.
Anyone got any suggestions on how to best create a connection onto the board of the keybow? A direct wired connection? A socket (shame there wasn’t a stemma/qt socket included)? Some other magical connection?
I only really see two realistic options, both custom fit…
either you solder wires directly to the pads, and from there your options are whatever you want, direct to device/breakout or to a socket plug, etc
or
you might try a something like a custom wedge/clip that you can lay contact pads on to connect to the existing pads, then as before, wire those out to whatever.
of the 2 the first is much easier, no tolerances required, but it’s likely to be messy. The second requires more work, but the end result would be a lot cleaner.
I’m considering the second approach myself, but with sugru or polymer clay since I don’t have a 3d printer, but I do have plenty of slicing and carving tools, which I could then route to some jst connectors. If that works well I may upgrade to some of my precious delrin. but it’s a long ways down my to do list
My concern was that there is no mechanical solder points to take the strain of connecting a socket , only the pads themselves. I’d not thought about printing a custom socket, it could bridge all three PCBs to spread the load so not need a solderable mount point. I’ll try to 3d print something and let you know how I get on…
with the custom printing/molding method you can also capture or replace the two standoffs on the same side giving it extra stability and securement.