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Process

1. Test the motion sensor with LED light

Firstly, I built the test circuit connecting the LED light and the PIR motion sensor. As soon as I approached the motion sensor, the LED lit up. And then when I walked away, the LED light went out after about 15 seconds. Therefore, I knew that the motion sensor was working well. I consider a time delay of 15 seconds acceptable because the sensor might need some time to figure out whether there are still motion changes taking place.

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