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diff --git a/led-light-sensor/lib/.holder b/led-light-sensor/lib/.holder
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+++ b/led-light-sensor/lib/.holder
diff --git a/led-light-sensor/src/sketch.cpp b/led-light-sensor/src/sketch.cpp
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+++ b/led-light-sensor/src/sketch.cpp
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+#include <Arduino.h>
+
+/*
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+ 
+  This example code is in the public domain.
+ */
+ 
+// Pin 13 has an LED connected on most Arduino boards.
+// give it a name:
+int led = 13;
+
+// the setup routine runs once when you press reset:
+void setup() {                
+  // initialize the digital pin as an output.
+  pinMode(led, OUTPUT);    
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+	int sensorValue = analogRead(A0); // Lit la valeur sur le pin A0
+	digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
+	delayMicroseconds(exp(sensorValue/100)*2); // Laisse la LED allumée quelques 10ièmes de millisecondes
+	digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
+	delay(5);               // Éteint la LED pour 5 millisecondes
+}
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