1) http://www.wikidebrouillard.org/index.php/Compteur_de_passages 2) https://openclassrooms.com/courses 3) http://atelierjcm.com 4) https://www.arduino.cc 5) http://www.dreamdealer.nl/tutorials/connecting_a_1602a_lcd_display_and_a_light_sensor_to_arduino_uno.html 6) http://playground.arduino.cc/Main/LiquidCrysta