Unlike the ready-made control shield we covered in an earlier article, a standalone joystick module lets you understand its internal working principle and wire it manually into any Arduino project.
Components needed
An Arduino board, a PS2-style joystick module, and connecting wires.
Wiring it up
The module connects to Arduino through five pins: power and ground (VCC 5V and GND), the two analog output pins VRx and VRy connected to A0 and A1 to read the X and Y axes respectively, and the digital button pin SW connected to a digital pin (such as pin 8) to detect a press.
How it works
Internally, the module contains two independent 10K-ohm potentiometers arranged in a gimbal structure, with one tracking horizontal movement and the other vertical movement; these variable resistors act as voltage dividers, converting mechanical motion into analog electrical signals. Arduino's 10-bit analog-to-digital converter turns these signals into values between 0 and 1023 for each axis, with the center position reading around 512 and full deflections producing near-maximum or near-minimum values. The built-in push button acts as a simple digital switch, triggered by pressing the stick's cap straight down.
You can find standalone joystick modules at Juthour Tech.
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