In this assignment we are going to probe the analog and digital levels of input devices. We choose the microphone module and PIR sensor for this assignment.
Probing analog levels of a microphone module
We used the oscilliscope to probe the analog ouput pin of the microphone module. When someone talks near the microphone, the below waveform is observed on the oscilliscope.
Probing digital levels of a PIR sensor
We used the oscilliscope to probe the digital ouput pin of the PIR sensor. When a motion is detected the digital ouput is observed to be HIGH then after a while it turns off to the default state of level LOW.
