sensor
Laser Target Tutorial
Laser Target Tutorial
In this tutorial you'll create the target circuit for your laser shooting game! When you shoot the target an LED will change color. Below you'll find a diagram and the code.
WARNING Lasers can cause permanent damage to your eyes. DO NOT look directly into the laser when on or point it at another person's face.
Set up
- Open your Arduino software on your laptop
- Use a USB wire to connect your Arduino board to your computer
- Select the Arduino under Tools > Port
Schematic
Schematic
Photoresistor in A4 and 3.3V
Resistor in A4 and GND
LED in A0 and A1
Code
Code
int ldrPin = A4;
long ldrValue1, ldrValue2;
void setup(void) {
pinMode (ldrPin,INPUT);
pinMode (A0, OUTPUT);
pinMode (A1, OUTPUT);
}
void loop(void) {
ldrValue1 = analogRead(ldrPin);
delay(10);
ldrValue2 = analogRead(ldrPin);
if (ldrValue1-ldrValue2 > 20||ldrValue2-ldrValue1 > 20){
digitalWrite(A0,HIGH);
digitalWrite(A1,LOW);
delay(1000);
}
else{
digitalWrite(A0,LOW);
digitalWrite(A1,HIGH);
}
}