added missing variables

triggerMultiplier.ino

+// Define the pin numbers
+const int INPUT_TTL_PIN = 2;  // Example pin number for input TTL
+const int OUTPUT_TTL_PIN = 3; // Example pin number for output TTL
+const int LED_PIN = 13;       // Example pin number for LED
+
+// Define other necessary variables
+int ttlFactor = 1;            // Default TTL factor
+bool wasTTLDetected = false;  // Flag to check if TTL was detected
+bool wasTimeoutDetected = false; // Flag to check if timeout was detected
+unsigned long lastTtlTime = 0;   // Last time TTL was detected
+unsigned long lastManualTtlTime = 0; // Last time manual TTL was triggered
+unsigned long ttlTimeoutInterval = 0; // Timeout interval for TTL
+int pulseWidth = 5;           // Default pulse width
+int outputInterval = 10;      // Default output interval
+int inputInterval = 40;       // Default input interval
+int previousTriggerLineState = LOW; // Previous state of the trigger line
+int currentTriggerLineState = LOW;  // Current state of the trigger line
+
 void setup() {
   pinMode(INPUT_TTL_PIN, INPUT);
   pinMode(OUTPUT_TTL_PIN, OUTPUT);