Blind-friendly AC Remote swaps Buttons for one Smooth Slider + Braille Display

Mid-June, lights off, ceiling fan swirling lazily, you pat the bedside table in a blind hunt for the AC remote, pressing every shape your fingers meet until a coaster clatters to the floor. Sighted users grumble when that ritual lasts ten seconds. However, for someone with limited or zero vision, the dance can steal entire minutes, each one stretching patience while the room swells with stale heat.

An industrial design trio from Seoul decided the remote should quit playing hide and seek altogether. Their answer is a remote control that does two things fundamentally differently – it starts with a wall-mounted design so there’s really no frantic hand-waving to find the remote (or upturning the sofa to check if the remote slipped through the cushions). The second design deviation is the use of a Braille display and a sliding temperature input – two features that make the remote control an instant hit for people who can’t easily navigate rows of buttons, and LCD screens.

Designer: Zhejiang Zhongguang Electrical Co., Ltd.

The beauty of that slider sits in its analog honesty. A linear potentiometer pipes position data straight into a split-core microcontroller, letting the user drag temperature in one fluid sweep rather than jabbing plus and minus claws. Each millimeter equals roughly 0.16 degrees, so nudging two ridges cooler truly means two degrees cooler, no abstraction, no laggy delay, no pixel-guessing hidden behind glass.

Temperature feedback arrives via a three-character braille display tucked above the track. Twelve piezo pins rise for dots, sink for blanks, refreshing every 400 milliseconds to mirror slider position. Sixteen through thirty read cleanly, one cell for the tens, one for the units, while the third cell provides haptic confirmation whenever the remote shifts between cool, heat, and fan modes.

Power comes from an 800 mAh lithium-ion pouch good for roughly fourteen months of daily tweaks, helped by a dozing Bluetooth Low Energy radio that wakes only when the slider moves. During setup, the unit memorizes your split-type’s IR codes, then retires its antenna, leaving the final user experience purely tactile and local, immune to spotty Wi-Fi or another app begging for location permission.

What fascinates me is the philosophical slap this product gives to decades of screen-centric interaction. Designers keep cramming OLEDs into remotes under the banner of smart living, forgetting that information transmitted visually vanishes for anyone outside the favored bell curve. Here, sight becomes optional. Orientation relies on rails and braille that physically change, the way thermostats once dialed before progress equated buttons with progress.

It also solves that recurring universal-design dilemma where accessible add-ons feel tacked on. The slider is the primary interface for everyone, not a secondary braille sticker pack. Sighted guests can glance at the inked scale, yet the haptic cue is still quicker in the dark. Equality by default, novelty through restraint, very Dieter Rams if Rams had prototyped for Perkins School rather than Braun.

Products that quietly rearrange everyday rituals often become the tools we refuse to live without. This wall-hugging controller trades the cold glow of digits for the warmth of touch, proving empathy can be machined, injection-molded, and mounted at shoulder height, waiting patiently for any hand that reaches its way.