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I have only got the datasheet for the ST7302 which I have attached. I did not manage to get hold of a ST7301, what is the physical size?
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The sockets are actually for IC pins and the last place I bought something similar was from Mechboards .
The usual breadboard jumper wires are too thick for these sockets and I am afraid I have no idea where the ones in the picture came from.
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Here is the video of the editor in action writing the traditional hello world program. The typing is a little painful as I am used to using this keyboard with my thumbs.
https://youtu.be/eWG1iZ8Woz0?si=R9hkCvVP_7za8025
There is an example of cut and paste at the end of the video.
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I have posted a more comprehensive description of this on Hackaday https://hackaday.io/project/195010-pocket-pad/ . It has also been picked up by a Hackster writer here.
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Thanks, that is interesting, I will try it on the boards I have. Yes, I think the main difference is the 3.3V regulator. The full schematic for the nice!nano can be found here https://nicekeyboards.com/docs/nice-nano/pinout-schematic. There are two versions. I think the AliExpress board is like V1 except that the resistor should be 2M not 5K. I have the V2 board which has a different circuit for the external 3.3V.
Can you post a photo of the location of the 5K resistor.
That looks really nice, a new Pixl with this display, NRF52840 and some extra flash would be very attractive.