Layser Module

hardware

• Arduino Board
• Relay Module Board

wire

• VCC S
• - 7

code

#include <retrieval.h>

const int laserPin = 7;  // laser attch to
static int dotDelay = 200;

void setup() {
  // put your setup code here, to run once:
  pinMode(laserPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  char ch = 0;  // store the character or digit read from the serial monitor
  if (Serial.available() > 0) {
    // is there anything to read
    ch = Serial.read();  // read a single letter from serial monitor
  }
  morseSignal(ch);  // flashes depend on the letter
}

void flashDot(char cha) {
  digitalWrite(laserPin, HIGH);
  if (cha == '.') {
    delay(dotDelay);
  } else {
    delay(dotDelay * 3);  // gap between letters
  }
}

void flashSequence(char *sequence) {
  int i = 0;
  while (sequence[i] != NULL) {
    flashDot(sequence[i]);
    i++;
  }
  delay(dotDelay * 3);
}

void morseSignal(char ch) {
  if (ch >= 'a' && ch <= 'z') {
    flashSequence(letters[ch - 'a']);
  } else if (ch >= 'A' && ch <= 'Z') {
    flashSequence(letters[ch - 'A']);
  } else if (ch >= '0' && ch <= 9) {
    flashSequence(numbers[ch - '0']);
  } else if (ch == ' ') {
    delay(dotDelay * 4);  // gap between words
  }
}