How the Wii Remote Is Made: Components and Manufacturing Process

The Wii Remote (Wiimote) integrates multiple technologies into a handheld controller.

Key Components

• Case: ABS or polycarbonate plastic (injection molded).
• Mainboard (PCB): Houses CPU, memory, Bluetooth radio, and I/O controllers.
• Motion Sensors: 3-axis Accelerometer (linear motion) + Gyroscope (rotation) — often a combined MEMS package (e.g., STMicroelectronics / InvenSense).
• IR Camera Sensor: PixArt optical sensor tracks infrared LEDs from the Sensor Bar for pointing.
• Bluetooth Module: Broadcom/CSR chip for wireless communication with the Wii console.
• Audio: Small speaker + DAC for sound effects.
• Haptics: Eccentric Rotating Mass (ERM) vibration motor.
• Buttons: Silicone membrane switches (A, B, 1, 2, +, -, Home, D-Pad).
• Power: 2x AA battery compartment (accessible via battery cover).
• Expansion Port: I2C bus for Nunchuk, Classic Controller, MotionPlus, etc.

Manufacturing Process

1. Component Fabrication: Chips (wafer fab), PCBs (etching/soldering), plastics (molding), sensors (MEMS fab).
2. SMT Assembly: Pick-and-place machines populate the PCB with components; reflow soldering.
3. Sub-Assembly: Button membranes, battery contacts, IR window, speaker grille assembled into front/back shells.
4. Final Assembly: Mainboard placed into shell; ribbon cables connected; shells ultrasonic welded or screwed shut.
5. Calibration & Testing: Automated jigs verify button response, accelerometer/gyro calibration, IR tracking accuracy, Bluetooth pairing, audio output, and rumble function.
6. Packaging: Boxed with wrist strap, manual, and safety booklet.

The choice of AA batteries prioritized user-replaceability and low cost over internal rechargeable packs.