IIICC VS Chordie

Case was designed by my friend when I released my IIICC, been working on it since.

I would use 2x I2C expander. This way you have 8x8 matrix on each expander and on top of that you can easily add more modules in the future. Just use more expanders. Here you have an example of 3 split keyboard based on I2C expanders.

For a working I2C expander based keyboards you can check my IIIC and Chordie. Sadly you can't get away from writing your own matrix scanning as there's no easy way to make reading I2C expander states in QMK. MCP23017 and MCP23018 have the same register addresses so there's no problem with moving the code between those two.

You can check my code for IIICC. I am scanning 3 I2C expanders to combine the data into one scan result.

Encoders change states following Gray code. There's a moment where A and B pins are all connected to C thus why you are having such issues. Check data sheet for the Output Table. To make it work you will have process those keys on your own and encode it the same way it's done with rotary encoders in QMK. It's easy actually. You can check my code here.

My IIICC is one of them. For making it work you have to write your custom matrix scanning. Take a look at my src it's all there. Let me know if you have any questions.

The IIICC is a three piece split by u/kbjunky (git, easyeda).

You can find it here: https://github.com/kbjunky/IIICC

Hope you like it. You can find some pics and videos in the gallery. There's a full guide and chord cheat sheet on my Github.

It's very easy, just like any other encoder. One example can be found here.

For a working I2C expander based keyboards you can check my IIIC and Chordie. Sadly you can't get away from writing your own matrix scanning as there's no easy way to make reading I2C expander states in QMK. MCP23017 and MCP23018 have the same register addresses so there's no problem with moving the code between those two.

You might want to check my chording keyborard Chordie. It's 3D printable/handwired. Also making use of ASETNIOP just like Ginny but this one is running on /r/DennyTom engine and has a bit more features than Ginny.

Welcome to the Keyboard&Trackball family. Once you start using such a combo there's no going back. I have just attached one to my updated IIICC. Still work in progress but since I started using Chordie with trackball I knew I can't go back to keyboard + mouse. Reaching out to mouse is so annoying.

Typing with a pen on a virtual keyboard sounds slow, I'd be looking into an ergonomic split keyboard or a chorded keyboard instead.

You can try https://github.com/kbjunky/Chordie

Hi all! I'm the creator of Chordie. Thank you very much for all the comments and upvotes! I am glad that you find my project interesting. /u/_eLRIC already posted all the relevant links so I will only add project page on my Github. You can also find some other interesting projects there like breakout boards for mouse sensors, namely ADNS9800 and PMW3360.