One Joycon Has an IR Sensor
Even though the left and right Joycon look identical, with their face buttons and stick swapped, the right Joycon actually has a bit more functionality than the left, thanks to the added IR sensor. It’s found on the bottom of the switch controller and is ostensibly there for its object detection to aid with motion controls in some games. However, this is also used in a variety of different Nintendo Labo projects (and several more DIY projects like Labo made out of Lego).
The IR sensor does get used for games like Ring Fit Adventure (tied to that awkward squeezable peripheral). It’s also part of the reason Mario Kart 8: Deluxe has motion controls. Oh, you forgot that Mario Kart had motion controls? Don’t worry. You haven’t been missing out on some amazing Kart tech that will finally help you win against your friend who’s way too good at the game.
