Hey,am new in the arduino platform.I just bought the us100 ultrasonic sensor three months ago and I've tried close to ten different programs and new ping h libraries but I can't seem to get to work...it always reads 0cm or no results on other programs and on others it does nothing at all...so that made me suspect that maybe I bought a broken sensor then I bought another one...and it does the same thing as the first so I guess it confirms that the problem is my programming and not the sensor itself...please anyone if you have any working code for this sensor and it's libraries please post it 4 me cause I really need your 
Thanks in advance