Changes
/* HC-SR04 */
=== HC-SR04 ===
* https://code.google.com/p/arduino-new-ping/
* Using [https://code.google.com/p/arduino-new-ping/wiki/NewPing_Single_Pin_Sketch (Use 1 PIN one pin] on the Arduino)doesn't seem to work, with [https://code.google.com/p/arduino-new-ping/wiki/Simple_NewPing_Example 2 pins] it's OK
== Galerie ==
