Alphabot2 for micro:bit User Manual
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CHAPTER 7 INFRARED OBSTACLE AVOIDING
Two infrared sensors are integrated in the front of the Alphabot2-Base board, if you
have assembled the Alphabot2, they are under the Ultrasonic sensor.
Every infrared sensor has one sender and one receiver, infrared lights are sent from
the sender, if there is obstacle in the front, some of them will be reflected and received
by the receiver. There are green LEDs beside infrared sensors to indicate obstacles.
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