Yet another topic about Joystick poor range and Arduino Analog reading - Sensors - Arduino Forum
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Seeed Studio Grove Thumb Joystick, 10k Potentiometer + Switch, For E.g. Arduino | eBay
Joystick Dual-axis XY Module for Arduino | ePartners NZ
Potentiometer and Joystick | Rolling Robots
2-axis joystick and its interfacing with Arduino
Game Controller Replacement, 5Pcs Dual-axis Joystick Sensor Module, Metal Button Handle Potentiometer for PS2 Game Controller, Gamepad Control Lever for Arduino : Amazon.co.uk: PC & Video Games
How to Setup PS2 Joysticks on the Arduino - Circuit Basics