What is a Sensor and How does it Work?

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What is a Sensor and How does it Work?

Sensor - Block Diagram


Sensor is a module or chip that observes the changes happening in the physical world and sends the feedback to the microcontroller or microprocessor. Excitation (Power supply) and Grounding must be provided to the sensor for the proper working.


Classification of Sensors

Microcontroller accepts two types of inputs depending up on the type of sensor i.e. analog or digital.


Analog sensor senses the external parameters (wind speed, solar radiation, light intensity etc.) and gives analog voltage as an output. The output voltage may be in the range of 0 to 5V. Logic High is treated as “1” (3.5 to 5V) and Logic Low is indicated by “0” (0 to 3.5 V).


Analog Sensor - Block Diagram:



Unlike analog sensor, Digital Sensor produce discrete values (0 and 1’s). Discrete values often called digital (binary) signals in digital communication.

Digital Sensor – Block Diagram:


Comments

  1. KAAVIAN R30 August 2023 at 20:23

    It's good information sir...
    Thank you sir.......

    ReplyDelete

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