Sim Racing Wheel Button Box

Button Box for Sim Racing Steering Wheels

Required Parts

1x Arduino Micro Pro

12x Buttons (12mm hole)

7x M3 20mm screws

2x M3 30mm screws

2x M3 nuts

15x M3 heat inserts

2x OMRON D2HW-BL201H

4x 10x5mm magnets

Notes:

1. Button Wiring:
   • Connect one contact of each button to one of the defined pins (2 to 20).
   • Connect the other contact of the button to GND.
2. Testing:
   • Connect the Arduino to your PC.
   • Open the Control Panel and look for the game controller settings to test the buttons.
3. Adjustments:
   • You can adjust the pins and the number of buttons by modifying the arrays and constants.
   • If you want to add LEDs or other functions, the code can be extended accordingly.

Have fun building your button box! 😊

Arduino code:

#include <Joystick.h>

// Define the number of buttons
#define NUM_BUTTONS 16

// Button pins
int buttonPins[NUM_BUTTONS] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20};

// Create joystick instance
Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID,
                  JOYSTICK_TYPE_GAMEPAD,
                  NUM_BUTTONS,  // Number of buttons
                  0,            // No axes
                  false, false, false,   // No X, Y, Z axis
                  false, false, false,   // No RX, RY, RZ axis
                  false, false,          // No rudder, throttle
                  false, false, false);  // No accelerator, brake, steering

void setup() {
 // Configure buttons as input
 for (int i = 0; i < NUM_BUTTONS; i++) {
   pinMode(buttonPins[i], INPUT_PULLUP);  // Enable pull-up resistor
 }

 // Start joystick
 Joystick.begin();
}

void loop() {
 // Read button status and report to joystick
 for (int i = 0; i < NUM_BUTTONS; i++) {
   int buttonState = digitalRead(buttonPins[i]);
   // LOW means pressed, since pull-up resistor is active
   Joystick.setButton(i, buttonState == LOW ? 1 : 0);
 }
 
 delay(10);  // Polling interval
}