diff --git a/README.md b/README.md
index 6b1f26a..b124a27 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,18 @@
-# arduino-touchless-projects
+# Arduino touchless projects
 
+### Versions
+
+- **touchless_basic**: Läuft so lange, wie man die Hand in Reichweite hält.
+- **touchless_power_switch**: Ein und ausschalten von Geräten.
+- **touchless_time_limited**: Läuft für eine angegebene Zeit und stoppt anschliessend.
+
+
+#### Hardware
+
+* Arduino: - https://www.conrad.ch/de/p/arduino-ag-mikrocontroller-uno-rev3-smd-191789.html   **23.-**
+* Relay:   - https://www.play-zone.ch/de/elektronik-kit-zubehoer/module-karten/relais/1-kanal-relais-modul-karte-5v-30vdc-mit-kabel.html  **11.-**
+
+* Sensor: - https://www.pi-shop.ch/ultrasonic-range-sensor-hc-sr04   **7.-**
+
+* Pumpe:   - https://www.conrad.ch/de/p/modelcraft-kraftstoff-getriebepumpe-benzinfest-foerdermenge-0-6-l-207894.html  **13.-**
+* Pumpe2:  - https://www.brack.ch/velleman-wasserpumpe-871806  **15.-**
diff --git a/diy_relay_module.png b/diy_relay_module.png
new file mode 100644
index 0000000..175fcde
Binary files /dev/null and b/diy_relay_module.png differ
diff --git a/touchless_basic/touchless_basic.ino b/touchless_basic/touchless_basic.ino
new file mode 100644
index 0000000..9c602f2
--- /dev/null
+++ b/touchless_basic/touchless_basic.ino
@@ -0,0 +1,52 @@
+const int US_sensorPin = 7;
+const int relayPin = 10;
+const int waveBackWait = 5000;   //adjust this to set the min speed of wave gesture
+const int range = 8;   //Range of detection from the sensor in cm
+
+
+void setup() {
+  pinMode(relayPin, OUTPUT);
+  digitalWrite(relayPin, HIGH); // Default relay should be OFF!
+}
+
+void loop() {
+  long duration, cm;
+  pinMode(US_sensorPin, OUTPUT);
+  
+  digitalWrite(US_sensorPin, LOW);
+  delayMicroseconds(2);
+  digitalWrite(US_sensorPin, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(US_sensorPin, LOW);
+
+  pinMode(US_sensorPin, INPUT);
+  duration = pulseIn(US_sensorPin, HIGH);
+
+  cm = microsecondsToCentimeters(duration);
+  
+  if (cm < range && cm > 1) {
+    for (int i = waveBackWait; i > 0; i--) {
+      long new_duration, new_cm;
+      pinMode(US_sensorPin, OUTPUT);
+      digitalWrite(US_sensorPin, LOW);
+      delayMicroseconds(2);
+      digitalWrite(US_sensorPin, HIGH);
+      delayMicroseconds(5);
+      digitalWrite(US_sensorPin, LOW);
+      pinMode(US_sensorPin, INPUT);
+      new_duration = pulseIn(US_sensorPin, HIGH);
+
+      new_cm = microsecondsToCentimeters(new_duration);
+      if (new_cm < range && new_cm > 1) {
+        digitalWrite(relayPin, LOW);    // Turn Ralay ON
+        delay(500);                  // Miliseconds which it waits before turn off again
+        digitalWrite(relayPin,HIGH);    // Trun Ralay OFF
+      }
+    }
+  }
+}
+long microsecondsToCentimeters(long microseconds) {
+  return microseconds / 29 / 2;
+
+  
+}
diff --git a/touchless_power_switch/touchless_power_switch.ino b/touchless_power_switch/touchless_power_switch.ino
new file mode 100644
index 0000000..ab7af6c
--- /dev/null
+++ b/touchless_power_switch/touchless_power_switch.ino
@@ -0,0 +1,56 @@
+const int US_sensorPin = 7;
+const int relayPin = 10;
+const int range = 8;   //Range of detection from the sensor in cm
+int valRelay = 0;      // variable to store the read value
+long relayAction;
+
+void setup() {
+  pinMode(relayPin, OUTPUT);
+  digitalWrite(relayPin, HIGH); // Default relay should be OFF!
+}
+
+void loop() {
+  long duration, cm;
+  pinMode(US_sensorPin, OUTPUT);
+  
+  digitalWrite(US_sensorPin, LOW);
+  delayMicroseconds(2);
+  digitalWrite(US_sensorPin, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(US_sensorPin, LOW);
+
+  pinMode(US_sensorPin, INPUT);
+  duration = pulseIn(US_sensorPin, HIGH);
+
+  cm = microsecondsToCentimeters(duration);
+  
+  if (cm < range && cm > 1) {
+    long new_duration, new_cm;
+    pinMode(US_sensorPin, OUTPUT);
+    digitalWrite(US_sensorPin, LOW);
+    delayMicroseconds(2);
+    digitalWrite(US_sensorPin, HIGH);
+    delayMicroseconds(5);
+    digitalWrite(US_sensorPin, LOW);
+    pinMode(US_sensorPin, INPUT);
+    new_duration = pulseIn(US_sensorPin, HIGH);
+
+    new_cm = microsecondsToCentimeters(new_duration);
+
+    valRelay = digitalRead(relayPin);   // read the status of input pin
+    if (valRelay) {
+      relayAction = LOW;
+    } else {
+      relayAction = HIGH;
+    }
+
+    if (new_cm < range && new_cm > 1) {
+      digitalWrite(relayPin, relayAction);   // Switch Ralay ON or OFF
+      delay(1000);                           // Miliseconds which it waits before does any action again
+    }
+  }
+}
+long microsecondsToCentimeters(long microseconds) {
+  return microseconds / 29 / 2;
+
+}
diff --git a/touchless_time_limited/touchless_time_limited.ino b/touchless_time_limited/touchless_time_limited.ino
new file mode 100644
index 0000000..d361f78
--- /dev/null
+++ b/touchless_time_limited/touchless_time_limited.ino
@@ -0,0 +1,52 @@
+const int US_sensorPin = 7;
+const int relayPin = 10;
+const int range = 8;   //Range of detection from the sensor in cm
+
+void setup() {
+  pinMode(relayPin, OUTPUT);
+  digitalWrite(relayPin, HIGH); // Default relay should be OFF!
+}
+
+void loop() {
+  long duration, cm;
+  pinMode(US_sensorPin, OUTPUT);
+  
+  digitalWrite(US_sensorPin, LOW);
+  delayMicroseconds(2);
+  digitalWrite(US_sensorPin, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(US_sensorPin, LOW);
+
+  pinMode(US_sensorPin, INPUT);
+  duration = pulseIn(US_sensorPin, HIGH);
+
+  cm = microsecondsToCentimeters(duration);
+  
+  if (cm < range && cm > 1) {
+    long new_duration, new_cm;
+    pinMode(US_sensorPin, OUTPUT);
+    digitalWrite(US_sensorPin, LOW);
+    delayMicroseconds(2);
+    digitalWrite(US_sensorPin, HIGH);
+    delayMicroseconds(5);
+    digitalWrite(US_sensorPin, LOW);
+    pinMode(US_sensorPin, INPUT);
+    new_duration = pulseIn(US_sensorPin, HIGH);
+
+    new_cm = microsecondsToCentimeters(new_duration);
+
+    if (new_cm < range && new_cm > 1) {
+      digitalWrite(relayPin, LOW);    // Turn Ralay ON
+      delay(500);                     // Miliseconds which it waits before turn off again
+      digitalWrite(relayPin,HIGH);    // Trun Ralay OFF
+    }
+
+    if (new_cm < range && new_cm > 1) {
+      delay(3000);                     // Pauses the measure for 3 seconds.. so the liquid-flow stops after above time
+    }
+  }
+}
+long microsecondsToCentimeters(long microseconds) {
+  return microseconds / 29 / 2;
+
+}