Signum 3.0 PCB

The engineer's approach to ergonomic keyboard customization

Signum 3.0 PCB Signum 3.0 Assembled

Build Your Perfect Keyboard

Because your primary tool deserves to fit like a glove. Will this be another unfinished project, or your daily driver?

$62.97

Note: PCB only. Components shown in photos not included unless specified. CONUS shipping included. International available via email

Design by an engineer, for engineers. No marketing fluff, just solid engineering.

Builder Gallery

Custom Signum Build

"First ergo build! Palm keys are game changers"
- @DM

Minimalist Setup

"DIY ergonomics at its best!"
- @Joe B.

Minimalist Setup

"My daily driver for months now"
- @ES

Workstation Setup

"Perfect fit for my long fingers"
- @Howie H.

Workstation Setup

"A board that lets me build my way"
- @DG

Watch the Build Guide

View all build videos →

Read the Build Guide

See how engineers are customizing their Signum boards:

Paddle resting position

Read Joe B's build guide! →

Why 40%? (It's Not About Missing Keys)

The 40% keyboard is designed around one principle: Move keys to your fingers, not fingers to keys.

  • 🚀 Layers replace movement - Numbers, arrows, and functions appear under your fingertips
  • ⏱️ Faster than full-size - No more reaching for distant keys (proven in typing studies)
  • 💡 Designed for flow - Your hands never leave home position
"I was skeptical until I tried it. Now, I'll never go back!" - @vim_user
40% keyboard layer visualization
Try it for 1 week → Muscle memory kicks in

Thumb Cluster Paddle Innovation

60% Less Thumb Movement

This paddle system eliminates awkward thumb stretches:

  • ↘️ Natural resting position - Thumb stays centered over home key
  • 🔄 Lever-action activation - Tilt instead of reach-and-press side keys
  • ⚙️ Customizable resistance - 3D-printable paddle designs

"After using paddles, I can't go back to traditional thumb clusters" - @Martin K.

Paddle resting position Paddle activation

Technical Specifications

Custom Column Layouts

Each column supports 5-6 switch positions with vertical stagger adjustment to match your finger lengths.

Optimized Thumb Cluster

Improved 3rd key position and optional paddle system reduces thumb movement by 60%.

Palm Buttons

Corner buttons sit low into the palm, comfortable to hold for mods or layer access.

Caseless Design

Low-profile PCB sits directly on your desk (or even on your laptop keyboard without activating keys).

Universal Compatibility

Supports Pro Micro, Elite-C, and Teensy 2.0 controllers. Programmable with QMK or EasyAVR.

Durable Engineering

Integral cable channel prevents damage from accidental cable pulls.

The Build Process

What you'll need: Diodes (1N4148), switches (5-pin Cherry or Alps), microcontroller (Pro Micro/Elite-C), keycaps

What you'll get: A keyboard that actually fits your hands and workflow, not someone else's idea of ergonomics.

Signum 3.0 PCB

Ready to Build?

The Signum 3.0 isn't just another keyboard - it's your declaration of independence from one-size-fits-none input devices.

$62.97

Note: PCB only. Components shown in photos not included unless specified. CONUS shipping included. International available via email

Design by an engineer, for engineers. No marketing fluff, just solid engineering.