How to Use JSY-MK-1039: Examples, Pinouts, and Specs

The JSY-MK-1039 is a compact, low-profile tactile switch designed for user input in electronic devices. It features a reliable mechanical action and is available in a variety of actuation forces to suit different applications. This switch is widely used in consumer electronics, industrial control panels, and prototyping projects due to its durability and ease of integration.

• Keyboards and keypads
• Remote controls
• Consumer electronics (e.g., calculators, gaming devices)
• Industrial control systems
• DIY electronics and prototyping

The JSY-MK-1039 is a 4-pin tactile switch. The pins are arranged in a square configuration, with two pairs of pins internally connected. Below is the pinout description:

Note: Pins 1 and 2 are internally connected, as are Pins 3 and 4. This allows for easy integration into circuits regardless of orientation.

1. Placement on PCB: The JSY-MK-1039 is designed for through-hole mounting. Insert the pins into the PCB and solder them securely.
2. Connection: Connect one pair of pins (e.g., Pins 1 and 2) to the input signal or power source. Connect the other pair (Pins 3 and 4) to the output or ground, depending on the circuit design.
3. Debouncing: Tactile switches can produce noise or "bouncing" when pressed. Use a debouncing circuit or software algorithm to ensure stable operation.
4. Pull-Up or Pull-Down Resistor: When interfacing with a microcontroller, use a pull-up or pull-down resistor to maintain a defined logic state when the switch is not pressed.

The JSY-MK-1039 can be easily connected to an Arduino UNO for user input. Below is an example circuit and code:

• Connect one side of the switch (Pins 1 and 2) to a digital input pin on the Arduino (e.g., Pin 2).
• Connect the other side of the switch (Pins 3 and 4) to ground.
• Use the Arduino's internal pull-up resistor to simplify the circuit.

// Example code for using the JSY-MK-1039 with an Arduino UNO
const int buttonPin = 2;  // Pin connected to the JSY-MK-1039
int buttonState = 0;      // Variable to store the button state

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); // Set pin as input with internal pull-up resistor
  Serial.begin(9600);              // Initialize serial communication
}

void loop() {
  buttonState = digitalRead(buttonPin); // Read the state of the button

  if (buttonState == LOW) {
    // Button is pressed (LOW because of pull-up resistor)
    Serial.println("Button Pressed");
  } else {
    // Button is not pressed
    Serial.println("Button Released");
  }

  delay(100); // Small delay to avoid excessive serial output
}

• Voltage and Current Limits: Do not exceed the maximum operating voltage (12V DC) or current (50mA) to avoid damaging the switch.
• Debouncing: Always implement debouncing to ensure reliable operation in digital circuits.
• Mechanical Stress: Avoid applying excessive force to the switch to maintain its mechanical lifespan.

1. Switch Not Responding:

   • Cause: Poor soldering or loose connections.
   • Solution: Check and re-solder the connections. Ensure the switch is properly seated on the PCB.

2. Unstable or Erratic Behavior:

   • Cause: Switch bouncing or lack of debouncing.
   • Solution: Add a hardware debouncing circuit (e.g., capacitor) or implement software debouncing in your code.

3. Switch Feels Stiff or Unresponsive:

   • Cause: Dirt or debris inside the switch.
   • Solution: Clean the switch gently with compressed air. If the issue persists, replace the switch.

4. Exceeding Voltage/Current Ratings:

   • Cause: Using the switch in a high-power circuit.
   • Solution: Ensure the circuit operates within the switch's voltage and current limits. Use a relay or transistor for high-power applications.

Q: Can the JSY-MK-1039 be used in high-power circuits?
A: No, the JSY-MK-1039 is designed for low-power applications. For high-power circuits, use a relay or transistor to handle the load.

Q: How do I choose the right actuation force?
A: The choice depends on the application. For light-touch applications, use the 100g model. For more tactile feedback, choose the 160g or 260g models.

Q: Is the JSY-MK-1039 waterproof?
A: No, the JSY-MK-1039 is not waterproof. Use it in dry environments or consider a sealed switch for outdoor applications.

Q: Can I use the JSY-MK-1039 with a Raspberry Pi?
A: Yes, the JSY-MK-1039 can be used with a Raspberry Pi. Connect it to a GPIO pin and use a pull-up or pull-down resistor as needed.

This concludes the documentation for the JSY-MK-1039 tactile switch.