It is using the same idea of sona that emit sound and receive the and use the time difference to determine the distance between the sensor and the object in front of it.
The ultrasonic sensor was the last part we needed to navigate the maze, and after we finished our sensor, we started our testing of the actual maze.
Finally, we put our fan onto the robot to put out the fire. In order to power the fan(rated at 12V), we use two 9V batteries and a TIP 120 transistor.
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