Mostly Harmless
The MH60 mechanical keyboard

Custom, Programmable, Mechanical Keyboards

Keyboards – that you can build-on-your-own, program and personalise. Available in multiple configurations with different types of switches, keycaps and other customisation options

Mostly Harmless Keyboards are now avaiable for customisation and purchase from the

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Mechanical Switches

Mechanical keyboard switches
Mechanical Switches provide a better typing experience with tactile & audible feedback for your keystrokes. Build more accuracy and comfort into your typing experience.

Endless Customisations

Keyboard switches lit with RGB lighting
Choose your keycaps (shape, colours, texture), your keyboard case, your switch type and your keyboard lighting options. Tastefully define your keyboard experience.

Fully Programmable

MH60 keyboard layout, base layerMH60 keyboard layout, second layer
Don't put up with badly designed keyboard layouts anymore. Program your keyboard to maximise finger comfort and placement and your typing speed and efficiency.

The 60% Keyboard

The 60% keyboard layout
This is a standard 61-key staggered keyboard layout. The key switches are arranged in rows just like most popular keyboard layouts. Keys such as arrow keys and function keys are present on a layer switchable using a function key.

The 60% Split Layout

The 60% split keyboard layout
This is a 62-key columnar and split keyboard layout. The key switches are arranged in columns (also called an ortholinear layout). Additionally, the keyboard is split into a left and right half – both rotated at an angle.

The 40% Split Layout

The 40% Atreus split keyboard layout
This is a 42-key columnar and split layout. It is called the Atreus layout designed by Phil Hagelberg. It is a small, light-weight and portable ortholinear keyboard which uses the popular 40% keyboard layout.

Past Keyboard Builds

Granite DSA Keyset
Granite DSA Keyset
ICE SA Keyset
ICE SA Keyset
Custom DSA Keyset
Custom DSA Keyset
Troubled Minds SA Keyset
Troubled Minds SA Keyset
Modern Selectrics SA Keyset
Modern Selectrics SA Keyset
Deep Space SA Keyset
Deep Space SA Keyset
Custom DSA Keyset
Custom DSA Keyset
A hand-wired keyboard
A hand-wired keyboard
XDA keyset with RGB under-light
XDA keyset with RGB under-light
Dolch DSA Keyset with RGB backlight
Dolch DSA Keyset with RGB backlight
Ergodox EZ keyset
Ergodox EZ keyset
Custom DSA keyset
Custom DSA keyset
40% DZ40 keyboard with Dolch DSA keyset
40% DZ40 keyboard with Dolch DSA keyset
MDA Keyset
MDA Keyset
SA Keyset
SA Keyset
SA Keyset
SA Keyset
SA Keyset with walnut wood case
SA Keyset with walnut wood case
65% keyboard with /dev/tty keyset
65% keyboard with /dev/tty keyset
MDA Bones Keyset with walnut wood case
MDA Bones Keyset with walnut wood case
Atreus 60% keyboard
Atreus 60% keyboard
Switches mounted with a plate and PCB
Switches mounted with a plate and PCB
The GH60 PCB
The GH60 PCB
Compiling the keyboard firmware
Compiling and Flashing the Firmware
Flashing the keyboard firmware
Compiling and Flashing the Firmware

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Mostly Harmless
Email: guide@mostlyharmless.io | Phone: +91.9845646545 | Matrix Group Chat: #guide:mostlyharmless.io
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