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Passive infrared detector has no light source, and it can measure the position, temperature, or infrared
imaging of the detected object by receiving the characteristic spectral radiation of the detected object.
Note: This module can adjust the detection distance by the potentiometer, the detection distance is 2-
30cm, if it is found that the distance detection is not very sensitive, you can use the potentiometer to achieve
the desired results (rotating the potentiometer clockwise will increase the detection distance; counterclockwise
will decrease), it is shown in Fig.3.2.12.
Manual adjustment is shown in the following diagram:
Figure .3.2.10 Infrared obstacle avoidance schematic diagram
Figure .3.2.11 Connection of Arduino and Sensor
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