Lots of robotic projects need a joystick. This module offers an affordable solution to that. The Joystick module is similar to analog joysticks found in gamepads. This module produces an output of around 2.5V from X and Y when it is in resting position. Moving the joystick will cause the output to vary from 0v to 5V depending on its direction. If you connect this module to a microcontroller, you can expect to read a value of around 512 in its resting position (expect small variations due to tiny imprecision of the springs and mechanism) When you move the joystick you should see the values change from 0 to 1023 depending on its position.

Specifications:

•    Directional movements are simply two potentiometers - one for each axis 
•    Compatible with Arduino interface 
•    The biaxial XY Joystick Module KY-023 is compatible with Arduino boards 
•    5 Pin 
•    Color: Black