How to Use Bouton-Poussoir: Examples, Pinouts, and Specs

The Bouton-Poussoir, commonly known as a push-button switch, is an essential component in many electronic circuits. It is used to temporarily close or open an electrical circuit when pressed. This simple yet versatile component finds applications in various domains, including consumer electronics, industrial controls, and DIY projects. Whether you are building a simple LED circuit or a complex control system, the Bouton-Poussoir is a fundamental element that can help you achieve your design goals.

1. Identify the Pins: Determine the NO, COM, and NC pins on the Bouton-Poussoir.
2. Connect the COM Pin: Connect the COM pin to the ground (GND) of your circuit.
3. Connect the NO Pin: Connect the NO pin to the input of the component you wish to control (e.g., an LED or microcontroller input pin).
4. Optional NC Pin: If you need a normally closed configuration, connect the NC pin instead of the NO pin.

Here is an example of how to connect the Bouton-Poussoir to an Arduino UNO to control an LED:

Arduino UNO          Bouton-Poussoir
   5V  ------------------->  COM
  Pin 2  ------------------->  NO
   GND  ------------------->  GND

// Define the pin for the push-button
const int buttonPin = 2; 
// Define the pin for the LED
const int ledPin = 13; 

// Variable to store the button state
int buttonState = 0;

void setup() {
  // Initialize the button pin as an input
  pinMode(buttonPin, INPUT);
  // Initialize the LED pin as an output
  pinMode(ledPin, OUTPUT);
}

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

  // Check if the push-button is pressed
  if (buttonState == HIGH) {
    // Turn the LED on
    digitalWrite(ledPin, HIGH);
  } else {
    // Turn the LED off
    digitalWrite(ledPin, LOW);
  }
}

• Debouncing: Mechanical push-buttons can produce noise or "bounce" when pressed. Consider using a debounce circuit or software debounce logic to ensure reliable operation.
• Current Limiting: Ensure that the current through the push-button does not exceed its rated capacity (50mA @ 12V DC).
• Environmental Conditions: Operate the push-button within its specified temperature range (-20°C to +70°C) to ensure longevity and reliability.

1. Button Not Responding: Ensure that the connections are secure and that the button is not damaged.
2. LED Not Turning On: Verify that the LED and resistor are correctly connected and that the Arduino code is properly uploaded.
3. Button Bouncing: Implement a debounce mechanism in your code or circuit to filter out noise.

• Check Connections: Double-check all wiring and connections to ensure they are correct and secure.
• Use a Multimeter: Measure the voltage and continuity to diagnose issues with the push-button and circuit.
• Debounce Logic: Implement debounce logic in your code to handle button bounce effectively.

By following this documentation, you should be able to effectively integrate the Bouton-Poussoir into your electronic projects, ensuring reliable and efficient operation.