How to Use KY-024: Examples, Pinouts, and Specs

The KY-024 is a tilt sensor module designed to detect the angle of inclination. It operates using a ball switch mechanism, which closes the circuit when the module is tilted beyond a certain angle. This simple yet effective design makes the KY-024 ideal for applications requiring motion or tilt detection. Common use cases include robotics, gaming controllers, alarm systems, and other projects where orientation or movement needs to be monitored.

• Operating Voltage: 3.3V to 5V
• Output Type: Digital and Analog
• Tilt Detection Angle: Approximately 15° to 45° (depending on orientation)
• Dimensions: 32mm x 14mm x 8mm
• Weight: ~3g
• Operating Temperature: -40°C to +85°C

The KY-024 module has three pins for interfacing with external circuits. The table below describes each pin:

1. Power the Module: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to the ground.
2. Digital Output: Use the DO pin to detect tilt events. The pin outputs a HIGH signal when the module is tilted and LOW when it is not.
3. Analog Output: Use the AO pin to measure the tilt angle. The output voltage varies with the angle of inclination.
4. Adjust Sensitivity: The module includes a potentiometer to adjust the sensitivity of the tilt detection. Rotate the potentiometer clockwise or counterclockwise to fine-tune the detection threshold.

• Debouncing: The ball switch mechanism may cause signal bouncing. Use a capacitor or software debouncing techniques to stabilize the output.
• Mounting Orientation: Ensure the module is mounted securely and in the correct orientation for accurate tilt detection.
• Power Supply: Use a stable power source to avoid erratic behavior.
• Environmental Factors: Avoid exposing the module to excessive vibration or shock, as this may affect its performance.

Below is an example of how to connect and use the KY-024 with an Arduino UNO to detect tilt events.

• Connect the VCC pin of the KY-024 to the 5V pin on the Arduino.
• Connect the GND pin of the KY-024 to the GND pin on the Arduino.
• Connect the DO pin of the KY-024 to digital pin 2 on the Arduino.

// KY-024 Tilt Sensor Example with Arduino UNO
// This code reads the digital output (DO) of the KY-024 and prints the tilt status.

const int tiltPin = 2; // KY-024 DO pin connected to digital pin 2
int tiltState = 0;     // Variable to store the tilt state

void setup() {
  pinMode(tiltPin, INPUT); // Set tiltPin as input
  Serial.begin(9600);      // Initialize serial communication at 9600 baud
}

void loop() {
  tiltState = digitalRead(tiltPin); // Read the tilt state from the KY-024

  if (tiltState == HIGH) {
    // If the tilt sensor is activated
    Serial.println("Tilt detected!");
  } else {
    // If the tilt sensor is not activated
    Serial.println("No tilt detected.");
  }

  delay(500); // Wait for 500ms before reading again
}

1. No Output from the Module:

   • Ensure the power supply is connected correctly and within the operating voltage range.
   • Check the connections to the Arduino or other microcontroller.
   • Verify that the potentiometer is adjusted correctly for the desired sensitivity.

2. Erratic or Unstable Output:

   • Use a capacitor across the power supply pins to filter noise.
   • Implement software debouncing in your code to handle signal bouncing.

3. Analog Output Not Responding:

   • Ensure the AO pin is connected to an analog input pin on the microcontroller.
   • Verify that the tilt angle is within the detectable range of the module.

Q: Can the KY-024 detect the exact angle of tilt?
A: The KY-024 provides an analog output (AO) that varies with the tilt angle, but it is not highly precise. For exact angle measurements, consider using a gyroscope or accelerometer module.

Q: How do I adjust the sensitivity of the tilt detection?
A: Use the onboard potentiometer to adjust the sensitivity. Rotate it clockwise or counterclockwise to increase or decrease the detection threshold.

Q: Can the KY-024 be used in battery-powered projects?
A: Yes, the KY-024 is suitable for battery-powered projects due to its low power consumption. Ensure the battery voltage matches the module's operating range.

Q: Is the KY-024 suitable for outdoor use?
A: The KY-024 is not weatherproof. If used outdoors, it should be enclosed in a protective casing to prevent damage from moisture or dust.