Tactile Switch Buttons are a fundamental component in electronic design, providing a simple and effective way to input user commands. These switches are known for their tactile feedback, which gives a noticeable click when the button is pressed, reassuring the user of the action. With a compact and versatile 12mm square form factor, these buttons are widely used in various applications, including consumer electronics, control panels, and hobbyist projects with microcontrollers like Arduino.
Pin Number | Description |
---|---|
1 | Normally Open (NO) |
2 | Common (COM) |
3 | Normally Open (NO) |
4 | Common (COM) |
Note: Pins 1 and 3 are internally connected, as are pins 2 and 4. This allows for flexibility in the PCB design.
// Define the pin connected to the switch
const int buttonPin = 2;
// Variable for reading the pushbutton status
int buttonState = 0;
void setup() {
// Initialize the pushbutton pin as an input with an internal pull-up resistor
pinMode(buttonPin, INPUT_PULLUP);
}
void loop() {
// Read the state of the pushbutton value
buttonState = digitalRead(buttonPin);
// Check if the pushbutton is pressed
// If it is, the buttonState is LOW
if (buttonState == LOW) {
// Turn on the LED (in this example, the built-in LED on pin 13)
digitalWrite(13, HIGH);
} else {
// Turn off the LED
digitalWrite(13, LOW);
}
}
Note: The code assumes the use of the built-in pull-up resistor feature of the Arduino UNO. The switch is connected to pin 2 and ground.
Q: Can I use these switches with higher voltages? A: No, these switches are rated for a maximum of 50mA at 12V DC. Applying higher voltages can damage the switch.
Q: How can I tell if the switch is working during prototyping? A: You can use a multimeter to check for continuity between the NO and COM pins when the switch is pressed.
Q: Are these switches waterproof? A: No, standard tactile switches are not waterproof. Specialized switches should be used for applications requiring water resistance.
For further assistance, consult the manufacturer's datasheet or contact technical support.