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QT - SAO

SAO 1.69bis to QT Stemma architecture adapter

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I noticed that most of the Adafruit QT Stemma i2c devices have a common pinout and a common wire harness. Just a quick little adapter enables tapping into a who architecture of toys off of a badge.

Some easy wins here, but the pinouts are not as similar as one might hope. 

Still, poc on a perf going well. Just might need a lil more assistance from hand soldering or jumpers for the variances

  • Riffing on davedarko's Schedule SAO

    JonKangas10/17/2024 at 19:45 1 comment

    Davedarko was way ahead of me. He has a perfect little board that breaks out the pins for an add-on module. 

    The modules I have been eyeballing have the pins swapped, so I stole his work and modified it including removing the nice calendar silkscreen and adding a header for swapping data and clock. I also move vcc to the end because more of those are available on the adafruit modules I have coming. I sent off an urgent order to OSHpark since I am in PDX and I think they can pull this off in time.

    I have no idea if there will be room for the headers on front or on back. May need to solder blob it.

    beats deadbug by a smidge I think...

  • Sorta better

    JonKangas10/15/2024 at 19:40 0 comments


    Enamel wire helps, though half perf half bug is not a great look. 

  • Woah, this is uglier than the postit

    JonKangas10/14/2024 at 20:08 0 comments

    Amazon brings me things to test soon

  • Adafruit order

    JonKangas10/14/2024 at 17:24 0 comments

    ordered an assortment of adafruit i2c devices to play with.

    Dangling headers off a badge and connecting wires all over seems like a horrible idea. Proceeded anyway.

  • Inspiration struck

    JonKangas10/14/2024 at 17:23 0 comments

    ordered headers, wire and some perfboard 

    Drew a terrible schematic 


    I sort of expect this to be either a duplicate of someone else’s work and I’m just making notes for myself, or I’m just lazier about this hack than anyone would have ever imagined.

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