Keywish Hummer-Bot-1.0 Instruction Manual page 61

Fig. 3.2.21 The Data When the Sensor Does Not Detect the Black Line
Figure 3.2.22 The Data When the Sensor Detects the Black Line
From Fig.3.2.21 and Fig.3.2.22 we can see that the output is high level when the sensor does not detect
the black line, low level when detects the black line. We use the analog port to collect the sensor's signal, so
the printed value is analog that, the high level is reaching 1024, the low level is 0.
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