A 4x5 layout numpad with rotary encoder, LED indicator and OLED screen, featuring a basic calculator inside the OLED screen. The PCB supports both hotswap and solderable switch. Currently the PCB and case can only be purchased in Indonesia.

Keyboard Maintainer: ohchiko
Hardware Supported: Rubi PCB Rev. A, ATMega32u4
Hardware Availability: Local Indonesia GB.

Make example for this keyboard (after setting up your build environment):

make rubi:default

Flashing example for this keyboard:

make rubi:default:flash

To put this keyboard into bootloader mode (for flashing firmware), simply activate layer 3 and press the middle key (key "5" on the proto picture) on the default keymap.

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.