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Shaif Jawed
Shaif Jawed
Electronics and Telecommunication
11 Jan 2019

What are some of the most commonly used Arduino sensors for beginners ?

As everyone might already know that a sensor is a device which is used to convert the physical response from the environment such as sound, pressure, touch, motion etc into signals or impulses. In the past 2 years of engineering I have worked on many sensors for my mini projects, so I would like to mention the top 3 sensors which are most commonly used for interfacing with an Arduino board for beginners: 

>>> IR Sensor :: This is the first sensor I used to interface with an Arduino during a first year workshop where we build a line follower robot. These sensors are usually used in detecting obstacles. If you know how it looks like, you must have noticed that it has two diodes, the black diode is called an IR Receiver which is used for detection and the white diode is called an IR LED which is used for producing IR light of different wavelength. [ Cost : Rs ~100 ] 


>>> LDR Sensor :: LDR stands for Light Dependent Resistor, so as its name suggests this sensor is used in light sensing circuits since the component is technically a resistor which changes when light intensity falls on it. These senors are really cheap and doesn't requires much effort when interfacing with an Arduino. If I have to mention some of its application then you can use it in making security systems, or a street light whose intensity can be controlled depending upon the time of the day or even a simple project, a lamp which turns on or off depending upon the time of the day. [ Cost : Rs ~15 ]

>>> PIR Sensor :: PIR stands for Passive Infrared Sensor. Its used in one of those commonly used applications for detecting any sort of motion in the surrounding. It simply detects any changes in Infrared radiation in its field of vision which includes any humans or animals motion in around 10 m. Using this, you can simply build a motion detection circuit, or a security alarm system or control a steeper motor and much more. [ Cost : Rs ~150 ]

Well these were the most commonly used sensors I used to play with in my past mini projects. Its not like everyone must have started with the same ones I did so I would love to hear which one you used at the beginning. If you wan to build some awesome projects in the future, it'll be better if you start working on different sensors if you still haven't started. Other sensors which you can use in your projects :

  • Touch Sensor
  • Temperature Sensor
  • Accelerometer Sensor
  • Humidity Sensor
  • Moisture Sensor
  • Rain/Water Sensor
  • Ultrasonic Sensor