Added code and folder struture

code/coilDriver/coilDriver.ino

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+#include <SoftwareSerial.h>
+
+int impulsDelay = 1;
+int impulsLenght = 100;
+int potValue = 1;
+
+unsigned long previouscoil2trigger = 0;
+unsigned long lastcoil2trigger = 0;
+
+unsigned long lastdisplaywrite = 0;
+
+int ballspeed = 0;
+
+SoftwareSerial mySerial(4, 5); // RX, TX
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(7,OUTPUT);
+  pinMode(8,OUTPUT);
+  digitalWrite(8,HIGH);
+  digitalWrite(7,HIGH);
+  pinMode(2,INPUT_PULLUP);
+  pinMode(3,INPUT_PULLUP);
+  //attachInterrupt(digitalPinToInterrupt(2), impuls1, FALLING);
+  //attachInterrupt(digitalPinToInterrupt(3), impuls2, FALLING);
+  Serial.begin(9600);
+  Serial.flush();
+  mySerial.begin(4800);
+  mySerial.flush();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  unsigned long currentMillis = millis();
+  potValue = analogRead(A0);
+  impulsLenght = map(potValue, 0, 1023, 0, 100);
+  if (currentMillis - lastdisplaywrite >= 1000) {
+    lastdisplaywrite = currentMillis;
+    mySerial.print(impulsLenght);
+    mySerial.print(",");
+    mySerial.print(lastcoil2trigger-previouscoil2trigger);
+    mySerial.print('\n');
+  }
+  if (digitalRead(2)) {
+    impuls1();
+  } else if (digitalRead(3)) {
+    impuls2();
+  }
+}
+
+void impuls1() {
+    delay(impulsDelay);
+    digitalWrite(7, LOW);
+    delay(impulsLenght);
+    digitalWrite(7, HIGH);
+    Serial.println(millis());
+    delay(50);
+}
+
+void impuls2() {
+    previouscoil2trigger = lastcoil2trigger;
+    lastcoil2trigger = millis();
+    delay(impulsDelay);
+    digitalWrite(8, LOW);
+    delay(impulsLenght);
+    digitalWrite(8, HIGH);
+    Serial.println(millis());
+    delay(50);
+}

code/displayDriver/displayArduino.ino

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+#include <LiquidCrystal_I2C.h>
+
+LiquidCrystal_I2C lcd(0x27,16,2);
+
+#include <SoftwareSerial.h>
+
+#define rxPin 11
+#define txPin 10
+
+// set up a new serial port
+SoftwareSerial mySerial =  SoftwareSerial(rxPin, txPin);
+
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(rxPin, INPUT);
+  pinMode(txPin, OUTPUT);
+  // set the data rate for the SoftwareSerial port
+  mySerial.begin(4800);
+  mySerial.flush();
+  
+  lcd.init();
+  lcd.backlight();
+  lcd.setCursor(0, 0);
+  lcd.print("PatekCERN...");
+  delay(1000);
+  lcd.clear();
+  lcd.setCursor(0, 0);
+  lcd.print("Pulse: ?? ms");
+  lcd.setCursor(0, 1);
+  lcd.print("Speed: ?? m/s");
+
+}
+
+void loop() {
+  if (mySerial.available()>0){
+    int lenght = mySerial.parseInt(); 
+    int speed = mySerial.parseInt(); 
+    if (mySerial.read() == '\n') {
+      lcd.setCursor(7, 0);
+      lcd.print(String(lenght) + " ms ");
+      lcd.setCursor(7, 1);
+      float speedms = float(2) / (float(speed) / float(1000));
+      lcd.print(String(speedms) + " m/s ");
+    }
+  
+  }
+  
+}

code/oldWithInterrupts/oldWithInterrupts.ino

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+#include <SoftwareSerial.h>
+
+int impulsDelay = 1;
+int impulsLenght = 100;
+int potValue = 1;
+
+unsigned long previouscoil2trigger = 0;
+unsigned long lastcoil2trigger = 0;
+
+unsigned long lastdisplaywrite = 0;
+
+int ballspeed = 0;
+
+SoftwareSerial mySerial(4, 5); // RX, TX
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(7,OUTPUT);
+  pinMode(8,OUTPUT);
+  digitalWrite(8,HIGH);
+  digitalWrite(7,HIGH);
+  pinMode(2,INPUT_PULLUP);
+  pinMode(3,INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(2), impuls1, FALLING);
+  attachInterrupt(digitalPinToInterrupt(3), impuls2, FALLING);
+  Serial.begin(9600);
+  Serial.flush();
+  mySerial.begin(4800);
+  mySerial.flush();
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  unsigned long currentMillis = millis();
+  potValue = analogRead(A0);
+  impulsLenght = map(potValue, 0, 1023, 0, 500);
+  if (currentMillis - lastdisplaywrite >= 1000) {
+    lastdisplaywrite = currentMillis;
+    mySerial.print(impulsLenght);
+    mySerial.print(",");
+    mySerial.print(lastcoil2trigger-previouscoil2trigger);
+    mySerial.print('\n');
+  }
+}
+
+void impuls1() {
+    delay(impulsDelay);
+    digitalWrite(7, LOW);
+    delay(impulsLenght);
+    digitalWrite(7, HIGH);
+    Serial.print("1 ");
+    Serial.println(millis());
+    delay(50);
+}
+
+void impuls2() {
+    previouscoil2trigger = lastcoil2trigger;
+    lastcoil2trigger = millis();
+    delay(impulsDelay);
+    digitalWrite(8, LOW);
+    delay(impulsLenght);
+    digitalWrite(8, HIGH);
+    Serial.print("2 ");
+    Serial.println(millis());
+    delay(50);
+}