it works indoor or outdoor.
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Signing UpStep 1Ultrasound Sensor SFR05
The movement of the car is made independently and randomly, so the car can move in the same location with multiple paths all different.
The ultrasonic sensor can send a pulse of short duration (10μS) through pin sender, the receiver is waiting for the echo reading, a pulse width proportional to the distance where the object is.
Therefore, the distance is obtained and calculated by the microcontroller.
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