Hello everyone I want to create a VI that simulate the activity of a sensor (motion Sensor). In this case, i want to set up a light that turn on whenever there are people in the room,. The light will keep lighting in the next X (seconds), and then turns off (If there are no more motions sensed by the Sensor). In the period of X Seconds, if there is any person coming in the room, the led will keep be on until the next period of X seconds passes. And so on. (e.g) When x = 3(s) Case 1: {t:= 0, people coming the room, light = on t:= 1, (no people), light = on t:= 2, (n.a) t:= 3, (no people), light = off } Case 2: {t:= 0, people coming the room, light = on t:= 1, (n.a) t:= 2, people coming the room, light = on t:= 3, (no people, light = on) ... t:= 5 (no people, light = off) } Because i don't have any real material and sensor, i only use a random function to simulate the people entering the room. I have trouble when building the VI. I tried some version but they are all failure. Any idea? Please ! I'm using labview 2011 P/S: English is not my mother-tongue, so please ignore all grammatical mistakes that i have done.

The only thing that might be unfamiliar to you in this VI is the Boolean Crossing Pt by Pt, which is a pretty cool VI that outputs a True only when the input changes. Actually, I probably should have not used that at all because if you had continuous movement so that "human" was detected on every 1/2 second iteration of the while loop, it would only output a True and reset the timer upon the first True, following a False. So I'd eliminate that and just wire the =1 output directly to the Reset input of the Express VI.