Testing The Tracking Sensor - Keyestudio Micro:bit Mini Smart Robot Car V2 Instructions Manual

Testing the tracking sensor

Description
The micro:bit robot shield comes with two line tracking sensor elements. Also comes with two potentiometers
used for adjusting the sensitivity of sensor.
The tracking sensor is actually an infrared sensor. The component used here is the TCRT5000 infrared tube.
Its working principle is to use the different reflectivity of infrared light to the color, then convert the strength of
the reflected signal into a current signal.
During the process of detection, black is active at HIGH level, but white is active at LOW level.
The two line tracking sensors are controlled by P12 and P13 of micro:bit main board.
The left tracking sensor is controlled by P12; the right one is controlled by P13.
Place a white paper in the robot bottom; adjust the potentiometer (RP1; RP2);
Once the D2 and D6 led indicator turn on, the sensitivity is adjusted well.
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