Ultrasonic sensors are based on the measurement of the properties of acoustic waves with frequencies above the human audible range, often at roughly 40 kHz . They typically operate by generating a high-
If you buy as a module , it is easier to interface with Microcontrollers. Modules are available in 3pin , 4 pin or 5pin types.
It is widely used in Robotic projects for Object detection,Distance measurement,etc..
Range maximum 400cm.
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