This project is based on Sprite_tm’s Magic Paintbrush project. The idea is to make the Arduino compatible control module for HP cartridge in easy to connect format. Most of the mechanical parts is 3D printable. Electronics part is 23x38 mm PCB with 14 inputs and powered by 3.3V.
Here is the second prototype of the fully assembled mount .
As it can be seen mount fits pretty well with cartridge and PCB connected through pogo pins.
I've started to implement code to control cartridge with ESP32-WROVER here on github, but unfortunately it can not be tested with real cartridge since my first PCB prototype has an stupid issues. So I should fix it... again.