What it is
NotchDeck One is a one-handle mascon built on a single Nordic nRF52840. It speaks USB and Bluetooth LE at the same time and appears to your computer, phone, or console as an ordinary gamepad — no drivers, no lock-in. Games like Densha de GO! and Train Sim World read the lever's notches directly, and can drive its indicator lamps back.
Highlights
- ▸Driverless, dual-transport. The same HID report over USB and Bluetooth LE — plug in or pair, either way it's just a joystick.
- ▸Authentic notch lever. One analog axis carrying the full 15-step range — Emergency, brake B8–B1, Neutral, power P1–P5.
- ▸Magnetic position sensing. Contactless AS5600 angle read of the handle (with a classic cam-and-switch path documented as an alternative).
- ▸Host-controllable lamps. Notch indicator, status RGB, and warning lamps that simulators light up over HID.
- ▸Portable. LiPo powered with USB-C charging and a fuel gauge — untethered running.
- ▸Easy updates. Drag-and-drop UF2 firmware over USB; BLE OTA and SWD for recovery.
Under the hood
- MCU
- Nordic nRF52840
- Firmware
- Zephyr / nRF Connect SDK (C)
- Connectivity
- USB 2.0 + BLE 5.x (HID)
- Hardware
- KiCad, open design