Arduino Graphic Panel for ... RGB PWM-controlled backlight attached over I2C bus with the help of PCA9633 LED controller; Keyboard / Input No keyboard Digital Matrix up to 4x4 (on analog pins) Analog ...

One such module, a generic control panel for 3D printers, has caught the attention of [Bjonnh]. It contains an OLED display, a rotary encoder, and a few other goodies, and he set out to make use ...