![]() ![]() The push-button acts as a digital sensor. The digital sensors generate discrete signals in digital.c The output of this sensor has ON and OFF states with the logic of 1 and 0. The finite count that is measured like temperature, speed, strain, pressure are analog quantities and occurs continuously in nature. The voltage is the output signal and is directly proportional to the measurand. The analog sensors give uninterrupted varying output waves with a set of values. The loudspeaker gets the output wave from the actuator where the electric waves from the amplifier are again converted to sound waves with more reach. Then its fed to the amplifier where the electric waves are given strength and amplified then fed to the loudspeaker. Here the sensor is used as an input function to the microphone which senses the sound waves and converts it to electric signals. The system consists of a microphone, loudspeaker, and amplifier. The sensor deployed in the public operating system was discussed here. The working and usage of sensors vary from device to device according to the demand. The thermocouple is an example of a passive sensor. Here the current passed is called the excitation signal. The resistance is calculated by passing a current through it. The example of an active sensor is strain gauge which doesn’t generate its output signal but calculates the volume of applied pressure related to the resistance of the system.
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