i2c keyboard

[anthonysavatar]

Hi all! I'm looking for any thoughts/feedback on this idea. I've got a proof of concept i2c keyboard pcb working that uses the tca8418. I mainly made it for use in microcontroller based projects but it works well with raspberry pis.

Here it is plugged into the i2c breakout jack on a HyperPixel 4 display (no soldering used).




A closeup of the key layout:


I've got a couple project logs here with more info:
More details on the PCB: https://hackaday.io/project/162281-teen ... king-on-v2
Using it on the HyperPixel 4 display with a raspberry pi zero: https://hackaday.io/project/162281-teen ... connection

This is sort-of a successor to the Teensy Thumb Keyboard PCB (see also: github repo, Example RasPi3b+ build). That used a Teensy 3.2 or LC and all through hole parts.

[tinkerBOY]

Awesome work! I was just thinking of the same i2c implementation of a controller for the Pi using something like an attiny.

[moononournation]

This keyboard very fit for my ESP32 project!
https://twitter.com/moononournation/sta ... 3175891969