diff --git a/Sensors/src/main.cpp b/Sensors/src/main.cpp
index 0a7499b..11e571d 100644
--- a/Sensors/src/main.cpp
+++ b/Sensors/src/main.cpp
@@ -1,4 +1,8 @@
 // https://www.youtube.com/watch?v=M-UKXCUI0rE&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=53
+// https://www.youtube.com/watch?v=BTMMNsL0_b0&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=54
+// https://www.youtube.com/watch?v=2hwrDSVHQ-E&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=55
+
+
 
 
 #include <Arduino.h>
@@ -6,6 +10,9 @@
 int trigPin = 12;
 int echoPin = 11;
 int pingTravleTime;
+float distance;
+const int pulsTime = 40; // uS
+const float pingTimeToDistance = 0.017; // uS to cm, travletime[s] * 340 m/s / 2
 
 void setup() {
   // put your setup code here, to run once:
@@ -17,12 +24,17 @@ void setup() {
 void loop() {
   // put your main code here, to run repeatedly:
   digitalWrite(trigPin, LOW);
-  delayMicroseconds(10);
+  delayMicroseconds(pulsTime);
   digitalWrite(trigPin, HIGH);
-  delayMicroseconds(10);
+  delayMicroseconds(pulsTime);
   digitalWrite(trigPin, LOW);
   pingTravleTime = pulseIn(echoPin, HIGH);
   delay(25);
   Serial.print("Ping Time: ");
-  Serial.println(pingTravleTime);
+  Serial.print(pingTravleTime);
+
+  distance = pingTravleTime * pingTimeToDistance;
+  Serial.print(" Distance: ");
+  Serial.print(distance);
+  Serial.println(" cm");
 }