1PCS/6PCS KY-008 650nm Laser sensor Module 6mm 5V 5mW Red Laser Dot Diode Copper Head for arduino DIY Kit

Working voltage: 5V
Specification: 15*24 mm
Light source wavelength: 650 nm
Weight: 2.2 g

void setup()
{
pinMode(13, OUTPUT); // Define pin 13 as a digital output interface
}

void loop() {
digitalWrite(13, HIGH); // Turn on the laser head
delay(1000); // delay one second
digitalWrite(13, LOW); // Turn off the laser head
delay(1000); // delay one second
}

Arduino laser head sensor module