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Can anyone direct me to a tutorial on a motion sensor air cannon. I can figure out how to build the cannon and probably hack a motion light for the sensor but how do I shorten the interval of the blast to just a couple of seconds

Thanks
Keith
 

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You need some type of controller in addition to the motion sensor. The motion sensor is the trigger, the controller operates the prop.
 

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Can't say for sure but I doubt it. 2-3 seconds is too long for an air cannon valve and secondly, the description does not mention that the sensor has a post delay. With no post delay, when someone triggers it, 2 seconds later it will trigger again if that person is still in range, and so on.
 
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