LAFVIN Obstacle Avoidance Smart Car Kit - Page 60

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range in proportion .You can calculate the range through the time interval between sending trigger signal and receiving echo signal.
Formula: us / 58 = centimeters or us / 148 =inch; or: the range = high level time * velocity (340M/S) / 2; we suggest to use over 60ms
measurement cycle, in order to prevent trigger signal to the echo signal.