Keyestudio Micro:bit Mini Smart Robot Car - Page 52

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4) Test Result
Send the test code to micro:bit main board, then insert the micro:bit main board into the car shield and connect
a 18650 battery, turn the POWER switch ON.
At this moment, the micro:bit LED matric has no display.
But if approach your finger to the first tracking sensor (S1), the LED matrix will show
Ⅰ
in the middle;
Approach your finger to the second tracking sensor (S2), the LED matrix will showⅡ;
Approach your finger to the third tracking sensor (S3), the LED matrix will show Ⅲ;