Project 9 Digital Push Button

1.Introduction This is a basic application module. You can simply plug it into an IO shield to have your first taste of Arduino.

Advantages:

• Wide voltage range from 3.3V to 5V

• Standard assembling structure (two 3mm diameter holes with multiple of 5mm as distance from center)

• Easily recognizable interfaces of sensors (“A” for analog and “D” for digital)

• Icons illustrate sensor function clearly

• High quality connector

• Immersion gold surface

2.Specification

• Supply Voltage: 3.3V to 5V

• Easy to ‘plug and operate’

• Large button keypad and high-quality first-class cap

• Achieve interesting and interactive work

• Interface: Digital

• Size: 30*20mm

• Weight: 4g

3.Connection Diagram

4.Sample Code

int ledPin = 13;                // choose the pin for the LED
int inputPin = 3;               // Connect sensor to input pin 3 

void setup() 
{
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare pushbutton as input
}

void loop()
{
  int val = digitalRead(inputPin);  // read input value
  if (val == HIGH) 
  {            // check if the input is HIGH
    digitalWrite(ledPin, LOW);  // turn LED OFF
  } 
  else 
  {
    digitalWrite(ledPin, HIGH); // turn LED ON
  }
}