diff --git a/basics/simple-osc-explained/simple-osc-explained.ino b/basics/simple-osc-explained/simple-osc-explained.ino
index f6ddbc9..d5f4b5d 100644
--- a/basics/simple-osc-explained/simple-osc-explained.ino
+++ b/basics/simple-osc-explained/simple-osc-explained.ino
@@ -33,9 +33,9 @@ void loop() {
 
 
     digitalWrite( SPEAKER_PIN, LOW );
-    delayMicroseconds( analogRead(A2) ); // wait 
+    delayMicroseconds( analogRead(A2)*2 ); // wait 
     digitalWrite( SPEAKER_PIN, HIGH );
-    delayMicroseconds( analogRead(A2) ); // wait 
+    delayMicroseconds( analogRead(A2)*2 ); // wait 
 
   
 
diff --git a/basics/simple-osc-internal-trigger/simple-osc-internal-trigger.ino b/basics/simple-osc-internal-trigger/simple-osc-internal-trigger.ino
new file mode 100644
index 0000000..3a387d4
--- /dev/null
+++ b/basics/simple-osc-internal-trigger/simple-osc-internal-trigger.ino
@@ -0,0 +1,46 @@
+/*
+ * 
+ * Simple (PWM) Oscillator Internal Trigger
+ * 
+ * A2 = pitch
+ * A1 = note duration
+ * A0 = LFO speed
+ * 
+ * 
+ */
+
+bool triggered; // logic: trigered, yes or no
+#define SPEAKER_PIN 11 
+int noteDuration = 100; //default duration
+
+void setup() {
+  // set pin 11 as output
+  pinMode(SPEAKER_PIN, OUTPUT);
+
+}
+
+void loop() {
+
+
+    int noteDuration = analogRead(A1)/10; // read analog pin 1 (note duration 0-100ms)
+    int LFO = analogRead(A0)*2; // read analog pin 1 (note duration 0-2000ms)
+
+     //fake trigger   
+    for(int i=0;i<2;i++){
+
+  
+     for(int i=0;i<noteDuration;i++){  
+        digitalWrite( SPEAKER_PIN, LOW );
+        delayMicroseconds( analogRead(A2)*10); // wait 
+        digitalWrite( SPEAKER_PIN, HIGH );
+        delayMicroseconds( analogRead(A2)*10 ); // wait 
+        triggered = true;
+        delay(1); //playtime of the osc note: this numer * noteDuration milliseconds
+    }
+   
+
+    delay(LFO);  //fake trigger delay
+
+    }
+
+}