KY-004 Key Switch Module

The KY-004 Key Switch Module is a push button that will output a high signal when pressed.

Connection

Connect the Power line (middle) and ground (-) to +5 and GND. Connect signal (s) to pin 3 on the Arduino for this example

Code

[codesyntax lang=”cpp”]

int led = 13; //Define the LED pin
int buttonpin = 3; //Define the push button pin
int val; //Define a numeric variable

void setup()
{
	pinMode(led,OUTPUT);
	pinMode(buttonpin,INPUT);
}

void loop()
{
	val = digitalRead(buttonpin); // check the state of the button
	if(val==HIGH) // if button is pressed, turn LED on
	{
		digitalWrite(led,HIGH);
	}
	else
	{
		digitalWrite(led,LOW);
	}
}

[/codesyntax]

Links

37 in 1 box Sensor Kit For Arduino Starters brand in stock