Keyboard Builders' Digest
Save $10 at MMkeyboard! Code: KBDNEWS
Keyboard Builders' Digest / Inspiration

KMO - an input pass-through and macropad

Meet KMO by sango_gg, a companion for your keyboard that acts as an input pass-through and macropad.
Published July 25, 2021
Creators! Feel free to tip me off about your keyboard related projects to bring them to 120K readers.

Since KMO acts as a keyboard pass through, I need one microcontroller to be the USB “host” that your keyboard plugs into — this micro sends the inputs serially to the second micro that has a USB port connecting to your computer.

The second micro shows up on your computer as a virtual keyboard at the same time processes the inputs to animate KMO, play games, or whatever you want him to do.

The first micro is pretty low powered since it’s only processing the USB keyboard HID reports

The second controller has more horsepower since it has to drive the display, act as a virtual keyboard, and run any code for KMO’s functions.

Do you like this post? Share, donate, subscribe, tip me off!

Published on Sun 25th Jul 2021. Featured in KBD #36 (source).

Tags: macropad



Jhonatan Ferrer's JK206 is an open-source 12x5 ortho keyboard – actually 3 numpads stuck together.

Giant macropad

A wooden macropad for NovelKeys Big Switches with pen tray. Committed by AuthenticDanger.

Addams by KBDcraft

KBDcraft released Addams, a LEGO-compatible numpad as a versatile companion for the widely popular Adams kit.

Christmas ornament keypad

Hide-key's new design is a Christmas ornament shaped macropad with X switches.

Noritsu Z025892-01

Dedicated macropad of various Noritsu Digital Minilabs.


The Gigapad is a wireless macropad designed by Eric Pietrowicz.