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IIICC reviews and mentions
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When you got everything working but then realized it's a prototype case and there's no USB cutout yet.
Case was designed by my friend when I released my IIICC, been working on it since.
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Hello everyone! I'm making a custom keyboard and need an advise.
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.
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Documentation on IO 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.
- Lily58, Sofle vs Moonlander
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Custom matrix scanning help
You can check my code for IIICC. I am scanning 3 I2C expanders to combine the data into one scan result.
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Some Help with the Preonic Rev 3 Encoder Implementation
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.
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Any Existing Keyboards Built With Pro Micro and MCP23018?
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.
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Keyboard Builders' Digest / Issue 15
The IIICC is a three piece split by u/kbjunky (git, easyeda).
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IIICC repo is public now. Enjoy!
You can find it here: https://github.com/kbjunky/IIICC
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A note from our sponsor - InfluxDB
www.influxdata.com | 25 Apr 2024
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kbjunky/IIICC is an open source project licensed under GNU General Public License v3.0 only which is an OSI approved license.
The primary programming language of IIICC is C.
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