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Arduino ultrasonic sensor activating servo movement? Answered

I am building a rc car as part of a pretty big project that has a bunch of other stuff on it . But one thing I can't figure out, being I'm only slightly familiar with arduino (UNO), is how to make a servo move when the sensor tells it to. I am going to attach a hook on the front to lift up an object so I can transport it. Now what I want to do is have the sensor detect the object when it is close enough to the hook (3-4") and then tell the servo to move a given degrees, around 25, just enough to pick it up. I've been toying with the code for the obstacle detecting robots trying to see if I cant modify that for this type of use but a lot of that code is backup commands, alternate routes and all that other stuff. just need a simple detect object, send signal to servo and servo moves the hook to pick the object up. Thanks  

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mpilchfamily (author)2014-02-08

Need to take readings from the sensor. See what readings you get when objects pass in the range that you want. Record those reading and you'll have a range to work with. Now when the arduino sees a reading between the bottom and top range of the readings it can activate the servo for you.

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dmegill (author)mpilchfamily2014-02-09

Yeah I'm not that deep into it yet to know. I managed to make it put accurate distance readings into the debug but that's it. Could you explain a little bit more so I can figure it out?

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