Input device using a movable stick for directional control.

Sensor detecting infrared radiation.

Circuit board inside a keyboard.

Joystick designed for flight simulation controls.

Infrared light-emitting diode.

Electrical arrangement used to detect key presses.

Steering-wheel controller for driving simulations.

LED containing red, green, and blue emitters.

Keyboard capability to register many simultaneous key presses.

Foot-operated controller for racing or simulation systems.