A Theory of the
Electromagnetic Field

Field75 HE is our gateway connecting the frontier of analog input to the world of mechanical keyboards. Through which we have, for the first time ever, replicated the mechanical typing experience on a platform with unprecedented performance, amazing switch motion accuracy and granularity, and endless flexibility enabled by the magnetic switches.

Tap the untapped

The lightning pace that everything takes place on the Field75 HE shifts our focus of the design from buttons and wheels to visual elements that helps with cueing, locating, vibe enhancement without movement disruptions, such as the EM Lab keycap set specially made for the HE Field, whose high contrast colorways are inspired by the classic multimeter and tricorder.

Layer-based buttons. The magnetic switches are dazzling, the old school buttons and metal knobs don’t sit around idly either. Now fully integrated with layers, you can set up to 4 functions per mode for each button. Other innovative changes include a lighting effect/brightness 2D gear switch, and HE-specific features like the key trigger indicator.

Wrist Rest and deskmats. A new electromagnetic interpretation of the classic twin-pieced twotone look, and the high information density Orbit deskmat should give you eyes plenty to feast while your arms rest.

The magic of magnets

An average human’s reaction time is 300-500ms, while a pro gamer can reach 200ms through training. The total trip time for a key press to register after the finge-cap contact can however easily reach >100 ms, much of it spent on the key descenting to the actuation point. A magnetic switch cuts this trip by half by separating the process of actuation, accomplished at the speed of light through the Hall effect, from the tactile feedback, which can take as long as you want afterwards to assure your finger of its occurrence. And if you are as drawn to extreme performance as iron is to magnet, then the infamous rapid trigger mode is definitely for you.

Instant as instinct

The switches are only half of the story, every component in the signal’s pathway from the switch must run reliably at an even higher speed to fully unleash its potential. The requirements are staggering, the specs of the hardware even more so: MCU clocked at 144MHz, 8000Hz polling rate, only 0.5ms of total latency from the key activation to its registering….through their amazing skills our engineering team has pulled together this feat.

With greater processing power comes faster responses. All that 8000Hz polling back and forth requires one big bad MCU to handle, and our Nu1 is the right chip for the job. It has a clock rate of 144MHz, support for USB 2.0 data transmission, and 256kb of flash. In real world tests it is able to cut the total latency to 0.5ms, a full 15% improvement of 8000Hz performance over the best our competitors have to offer.

Hit all the right notes. Many little, subtle things need to be gotten right, before a mere 0.02mm of change in travel can be properly resolved, not just detected. Even slight vibrations can cause big deviations in readings, so does disturbances in the baseline voltage. In Field75 HE, not only did we design the TOP mounting structure, the electronics, the error-controlling process for every component all around the need to reduce errors and inter-key inconsistencies, the assembly and testing in the supply chain also need to be managed accordingly. At the end of the day, it is the <0.01mm error produced by the whole approach that makes fine-tuning the actuation distance useful for the users for the first time.

Race without running into each others. The race to a lower latency starts when the transverse voltage builds up in the Hall effect sensors, individually packaged and powered from the LEDs they retain their sensititity even when the RGB effects are maxed out. Similar arrangments at the end of the signals’ journey ensures the MCU is at full throttle handling their arrivals, utilizing a self-developed filtering algorithm that picks them at industry-leading accuracy and speed.

Within a finger’s reach

Settings and parameters editing are vital to the magneto-mechanical keyboard user experience. Through a new interactive design approach, NuPhyIO aims to make this unwieldy task more accessible for casual and experienced users alike. Every single parameter affecting the system performance is tweakable, and the tweaks are visible in the UI in real-time as they take effects, such as the per-key rapid-trigger/sensitivity annotations on the keyboard preview, or the bi-color actuation indication bar. Global configurations can be saved as layers, to be fired up later.

Mac, Windows, Linux…you name it.NuPhyIO’s key remapping and macro work seamlessly on all major desktop platforms, or any platform that supports Chromium-based browsers, making it even easier to customize the Field75 HE to your heart’s content.

It is like profiles, but for pros. Introducing the new mode, a complete overhaul of the mode on earlier NuPhy keyboard that provides integration and organization of all data associated with a user role, such as layers, lighting, travel distance & sensitivity. You can have different modes for different OSes, or different games, and they can all be selected by the redesigned ‘shifter’ switch. No more superheroic effort to get a superhuman apm.

Seeing is Believing. For the first time, tough technical concepts like the dead zone and resolution are configurable in a visualized and animated manner. You can adjust them on the fly and perceive the difference with both your fingers and eyes, along with a bunch of other parameters. Similarly manipulable and visualized are the layers, the basic units of layout editting in modern keyboard configurators, up to 12 of which are supported, with each mode having 4.

SPECIFICATION

Layout: ANSI 75%

Number of Keys: 83

Customizable Buttons: 8

Gear-shaped Knob: RGB
Scroll Wheel: Volume

Switch Type: Normal-profile Magnetic Switches

Stabilizer Type: Plate Mounted

Mount Type: Top

Hot-swappable Support: Yes
N-key Rollover Support: Yes

Backlight: South-facing RGB-LED

Backlight Modes: 20

Compatible System: macOS/Windows/Linux/Android/iOS

Operating Environment: -10 to 50℃

MCU: Nu1-8K-S-2405

CONNECTION

Wired Polling Rate: 8000Hz

PCB Scan Rate: 2500Hz

MATERIALS

Top Case: ABS

Bottom Case: ABS

Plate Material: Aluminum

SIZE AND WEIGHT

Long 142.8 mm (5.62 inches)
Wide 372.3 mm (14.66 inches)
Back Height 40.4 mm (1.59 inches)
Front Height 21.0 mm (0.83 inch)
Weight 1205 grams (2.66 pound)
Type Angle 4º/9º

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NuPhy Field75 HE

A Theory of the Electromagnetic Field