How to Use MKE-M02 Push Button Tact Switch Module: Examples, Pinouts, and Specs

The MKE-M02 Push Button Tact Switch Module is a compact and versatile electronic component used for adding a tactile interface to your projects. It is commonly used to input digital signals into a microcontroller or other digital circuits by pressing the button, which either makes or breaks the circuit. This module is widely used in applications such as:

• User input for microcontroller projects
• Interactive installations
• Prototyping and educational kits
• DIY electronics and hobby projects

• Voltage: 3.3V to 5V
• Current: 10mA (typical when active)
• Contact Resistance: ≤ 50mΩ
• Insulation Resistance: ≥ 100MΩ at 500V DC
• Dielectric Strength: 250V AC for 1 min
• Operating Force: 180/230 (±20gf)
• Life Expectancy: 100,000 cycles

1. Power Connection: Connect the VCC pin to the power supply (3.3V or 5V, depending on your circuit requirements).
2. Ground Connection: Connect the GND pin to the ground of your power supply.
3. Signal Connection: Connect the SIG pin to a digital input pin on your microcontroller.

• Use a pull-up or pull-down resistor to ensure a stable signal when the button is not pressed.
• Debounce the button either through hardware (with a capacitor) or software to prevent false triggering from mechanical vibrations.
• Avoid applying excessive force to the button to prevent damage.

// Define the pin connected to the push button module
const int buttonPin = 2;     
// Variable for storing the button state
int buttonState = 0;         

void setup() {
  // Initialize the button pin as an input
  pinMode(buttonPin, INPUT);
  // Begin serial communication at 9600 baud rate
  Serial.begin(9600);        
}

void loop() {
  // Read the state of the button
  buttonState = digitalRead(buttonPin);
  
  // Check if the button is pressed
  if (buttonState == HIGH) {   
    // If the button is pressed, print this message
    Serial.println("Button Pressed");
  } else {
    // If the button is not pressed, print this message
    Serial.println("Button Released");
  }
  // Delay a little bit to avoid bouncing
  delay(50);                   
}

• Button does not respond: Ensure that all connections are secure and the button is properly wired to the microcontroller.
• False triggering: Implement debouncing in your code or add a hardware debouncer to the circuit.
• Inconsistent readings: Check for any damage to the button or loose connections.

• Double-check wiring against the pin configuration table.
• Use a multimeter to ensure the button is functioning correctly when pressed.
• Review your code for proper button state handling and debouncing logic.

Q: Can I use this module with a 3.3V system? A: Yes, the MKE-M02 is compatible with both 3.3V and 5V systems.

Q: Do I need an external resistor for the module? A: It is recommended to use an external pull-up or pull-down resistor to ensure a stable signal.

Q: How can I prevent the button from bouncing? A: You can prevent bouncing by using a debounce algorithm in your code or by adding a small capacitor (e.g., 10nF) between the SIG pin and ground.

Q: Is the module suitable for rapid button presses? A: Yes, the module can handle rapid actuation, but ensure that your debouncing method can keep up with the press rate.

This documentation provides a comprehensive guide to using the MKE-M02 Push Button Tact Switch Module in your projects. For further assistance, consult the manufacturer's datasheet or contact technical support.