Hardware designed for one purpose often contains the seeds of many others.
A small device designed for play turns out to carry within it the quiet potential for much more. The original Nintendo Switch Joy-Cons, released in 2017 and now overshadowed by newer hardware, contain an infrared camera, sophisticated haptic feedback, and open Bluetooth connectivity that together allow these controllers to become security sensors, object locators, smartphone accessories, and programmable productivity tools. In an era when we are quick to discard the familiar for the new, these controllers remind us that ingenuity often lies dormant in what we already hold in our hands.
- The Switch 2's arrival quietly rendered the original Joy-Cons 'old news,' yet their dropped features — the IR camera and HD rumble — are precisely what make them more capable than their successor for creative repurposing.
- A ten-dollar eShop app transforms the right Joy-Con's infrared camera into a motion-triggered alarm, projecting an invisible beam across doorways and sounding an alert when broken — a simple but functional deterrent.
- The HD rumble's audible vibration can be weaponized against everyday forgetfulness: tuck a Joy-Con near your keys or wallet, trigger it remotely from the Switch's touchscreen, and follow the sound through your home.
- Standard Bluetooth pairing — a quiet departure from Nintendo's historically proprietary wireless protocols — lets Joy-Cons connect to Android, iPhone, and PC, functioning as camera remotes, game controllers, or custom input devices.
- Third-party software like BetterJoy and JoyToKey unlocks the deepest layer, allowing Joy-Cons to be recognized as unified controllers on Windows or remapped entirely into productivity shortcuts for artists, editors, and musicians.
The Nintendo Switch 2 may be the console of the moment, but the original Joy-Cons from 2017 quietly hold capabilities that most owners have never touched. Packed into those small wireless controllers are an infrared camera, a form of haptic feedback Nintendo calls HD rumble, and standard Bluetooth connectivity — features that together open the door to uses far beyond gaming.
The right Joy-Con's IR camera is the most surprising of these. An eShop app called Spy Alarm, available for ten dollars, turns it into a motion-triggered security sensor: set it facing a doorway, and it projects an invisible infrared beam that sounds an alarm when broken. It won't replace a real security system, but it works well enough as a simple deterrent for a bedroom door or monitored corner of a room.
HD rumble, meanwhile, is more than a gaming gimmick. Its vibrations are precise enough to simulate physical sensations — and audible enough to be heard across a room. The Switch already uses this to help locate misplaced controllers, but the same trick can be applied to anything kept near a Joy-Con: keys, a remote, a wallet. Trigger the rumble from the touchscreen and follow the sound, carrying the console with you to stay within range.
The Joy-Cons' Bluetooth connectivity is where the real versatility lives. Because Nintendo moved to standard Bluetooth rather than a proprietary protocol, the controllers can pair with Android phones, iPhones, and PCs. On a smartphone, a single Joy-Con doubles as a camera remote, triggering the shutter and controlling zoom from a distance. On a PC, a pair of Joy-Cons can function as a unified game controller with the help of BetterJoy, a program that installs custom drivers to make Windows recognize them as one device.
For those willing to go further, JoyToKey translates Joy-Con inputs into keyboard shortcuts and mouse commands, turning the controllers into programmable tools for digital artists, video editors, or anyone who wants faster access to frequently used functions. What began as a gaming peripheral becomes, in the right hands, whatever the moment requires — a reminder that the hardware we already own often contains more possibility than we think to look for.
The Nintendo Switch 2 may have captured the attention of console enthusiasts, but the original Joy-Con controllers from 2017 remain surprisingly capable devices. Beyond their primary function as gaming peripherals, these small wireless controllers pack features that most players never fully explore—an infrared camera, sophisticated haptic feedback, and standard Bluetooth connectivity that opens doors to uses far removed from the living room.
When the Switch first arrived, its defining innovation was the ability to detach the Joy-Cons and play either docked on a television or in portable mode on the console's built-in screen. What made this possible was the hardware packed into those small controllers: an IR motion camera in the right Joy-Con and what Nintendo calls HD rumble—a form of haptic feedback precise enough to simulate the sensation of physical objects moving inside your hands. These features powered games like "1-2 Switch" and the elaborate cardboard creations of Nintendo Labo, which used reflective stickers to track movement. The Switch 2's new controllers ditched the IR camera entirely, making the original Joy-Cons suddenly more valuable to anyone interested in their hidden capabilities.
The infrared camera offers perhaps the most unexpected practical application. An app called "Spy Alarm," available on the eShop for ten dollars, transforms the right Joy-Con into a motion-triggered security sensor. Place it on a flat surface, and it projects an invisible infrared beam across a doorway or window. When someone passes through and breaks the beam, the Switch sounds an alarm and logs the incident. It's not sophisticated enough for serious home security, but it works as a simple deterrent—useful if you're trying to keep a curious sibling out of your room or monitor a specific area of your house.
The HD rumble feature, meanwhile, offers a different kind of utility. Unlike the simple vibrations controllers have produced since the 1990s, HD rumble delivers precise, targeted feedback that can mimic physical sensations—the rattle of a lock in "Skyrim," for instance, becomes something you can feel. What's less obvious is that these vibrations are audible from a distance. The Switch includes a built-in feature to locate lost controllers by triggering their rumble, producing a soft audible tone. You can repurpose this by keeping a Joy-Con near something you frequently misplace—your keys, a remote, a wallet—and use the Switch's touch screen to trigger the vibration from anywhere in your house. The Joy-Con needs to stay within range of the console's main unit, but carrying the Switch around while you search solves that problem.
The real versatility emerges from the Joy-Cons' Bluetooth connectivity. Unlike Nintendo's previous consoles, which used proprietary wireless protocols, the Switch relies on standard Bluetooth pairing. This means you can unpair the Joy-Cons from your console and connect them to any Bluetooth-compatible device—an Android phone, an iPhone, a PC. On a smartphone, a single Joy-Con can function as a game controller, but it can also serve as a camera remote. The right Joy-Con's buttons can trigger your phone's camera app, allowing you to take photos from a distance rather than awkwardly holding the phone at arm's length. The buttons can even control zoom and other camera features. There's a limitation: phones can only pair with Joy-Cons individually, not as a matched pair, and only specific buttons and analog sticks work for camera control.
On a PC, the possibilities expand further. A Joy-Con or pair of Joy-Cons can connect via Bluetooth to any computer with wireless capability, functioning as a game controller for laptop gaming or desktop play. Pairing two Joy-Cons as a single unified controller requires third-party software—specifically, a program called BetterJoy that installs custom drivers allowing Windows to recognize them as one device. This makes them a practical alternative to a dedicated controller, especially if you're gaming on the go and don't have Nintendo's Pro Controller available.
Beyond gaming, the Joy-Cons' input can be remapped entirely through software like JoyToKey. This program translates button presses and stick movements into keyboard commands and mouse actions, effectively turning the Joy-Cons into programmable input devices. For creative professionals—digital artists, video editors, musicians using DAWs—this means assigning frequently used shortcuts to the Joy-Con buttons, speeding up workflow without requiring expensive specialized hardware. The original Joy-Cons, in other words, become whatever you need them to be: security sensors, lost-item finders, smartphone accessories, PC controllers, or custom input devices. They're a reminder that hardware designed for one purpose often contains the seeds of many others, waiting only for someone curious enough to look.
Notable Quotes
The Switch 2's new controllers ditched the IR camera entirely, making the original Joy-Cons suddenly more valuable to anyone interested in their hidden capabilities.— Analysis from the piece
The Hearth Conversation Another angle on the story
So the IR camera in the right Joy-Con—that was designed for games, but you're saying it can actually detect motion like a security system?
Exactly. The app "Spy Alarm" uses it as an invisible tripwire. You set the Joy-Con down, it projects an infrared beam, and if anything crosses it, your Switch alarms. It's simple, but it works.
And the HD rumble—that's just for feeling things in games, right? Like the texture of a lock?
That's the main use, but the vibration is also audible. The Switch can trigger it to help you find a lost controller. You can use that same feature to locate anything you keep a Joy-Con near—keys, a wallet, whatever.
That's clever. But what about using them with phones and computers? That seems like a stretch.
It's not, actually. They're just Bluetooth devices. Pair one to your phone and it becomes a camera remote—you can take photos from across the room. On a PC, they work as game controllers, or you can remap the buttons to keyboard shortcuts for creative software.
You need special software for that, though?
For some things, yes. To use two Joy-Cons as a single controller on PC, you need BetterJoy. To remap buttons to keyboard commands, you need JoyToKey. But both are straightforward to set up.
So basically, Nintendo packed a lot of capability into these small controllers, and most people never use it.
That's the thing. They were designed for gaming, but the hardware—the IR camera, the rumble, the Bluetooth—it's all there. You just have to think beyond the games.