Arduino is a phenomenal device used by many IOT enthusiasts around the world. For an overwhelming project, we need some good sensors so that we can develop the best project or application. Here we are going to discuss and review some of the popular and most commonly used sensors for implementing multiple IOT projects.You can easily buy all these sensors online on any famous e-commerce website. For programming purposes, its documentation and libraries are easily available on the internet. There are many types of sensors to choose from but you need to pick one depending on the associated project.
1 DHT11 and DHT22
DHT 11 is the most commonly used temperature and humidity sensor for Arduino Projects. It is easy to interface and can be availed at a low price. DHT11 can be used for projects involving temperature and humidity reading at the same time. Developed by Adafruit technologies, this is a great product for the best Arduino projects based on weather and temperature.
2 ESP8266 WiFi Serial Connector
This is the device used for connecting serial WiFi with the other sensors and the Arduino module. ESP8266 Wifi Serial module is one of a kind product that is not only easy to use but is efficient too. It enables you to build a wireless web server-client platform.
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3 Photo-resistor Light Dependent Resistor
The LDR is a light sensitive device used to indicate the existence of light in a specific area. It is basically used to measure light intensity. There is a great implication of resistance in this sensor. As the resistance of the sensor increases, the light intensity amplifies. It is perfect for projects with greater involvement of light-sensitive data.
4 Sound Sensor Module [Analog]
It is used to detect any sound that exceeds the set threshold. The sound level can be set as per requirement. When it exceeds the threshold an LED light switches on. The main parts of this sensor are a converter chip and a microphone. Furthermore, this module is also used to detect and read the sound intensity.
5 MQ2 Gas sensors
MQ Gas sensor series are the most widely used for gas identification and reading. The most common used MQ sensor is the MQ2 sensor for Smoke, Methane, Propane, LPG, and Butane gas. Mostly used in LPG leakage related projects, this is the best multipurpose gas sensor available in the market.
6 Speed Measuring Coupler
This sensor is used to detect motor speed, position count, pulse count and much more. It comes equipped with a fixed hole and is easy to install. It contains an output light that turns ON when the level of the output is high. It can be connected with other devices like the buzzer and a relay to provide for an alarm indicator.
7 Ultrasonic Transducer
The Ultrasonic Transducer HC-SR04 is a sensor that uses SONAR technology to determine the distance of any obstruction or an object. Its basic purpose is to convert any type of energy into ultrasonic vibrations specifically for measuring purposes. It is a highly recommended device in projects relating to distance measuring and object identification.
8 Buzzer Module
As the name suggests it is an audio-based signaling device. It is used in many applications and projects. It contains the electronics that produce the buzzing sound when alarmed. It is available as a 3 pin device and is mostly used with a switch by creating a circuit. It is also available in a 2 pin setup by a different model.
9 Pyroelectric Infrared Sensor (PIR)
This Adafruit sensor is made out of special material that is sensitive to Infrared Radiations. It is the most complex sensor of the list. PIR measures the infrared radiation whenever a motion takes place. Some of the projects in which it can be used are outdoor lighting and motion detection using IR.
10 LM35 Temperature Sensor
It is the most conveniently used temperature sensor. This integrated device is a precision temperature sensor that provides a direct serial output of the temperature of the desired space.
11 Soil Moisture Sensor
It is a capacitive device used to get the moisture readings of a soil sample. It is highly useful for projects using soil metrics for the project. It has an analog output. It is used in garden-based tests and other soil-based analysis tests.
It can be used to get the acceleration and speed data to the serial monitor of the Arduino environment. It is effective and uses very low current values. The output is given as analog. It is cheap, effective and great for motion oriented projects like an IOT based connected car or any other transportation-related project.
13 Piezoelectric Vibration Sensor
The Piezoelectric vibration transducer uses a ceramic piezoelectric material to sense vibrations and send the data to the serial monitor. It contains electronic drums for vibration-based interaction. Its output is sent to the analog port.
14 Force Sensor Resistor
Also an Adafruit Industries product, this is a force sensitive resistor used for applications where we need the involvement of force based metrics and actions. It contains a resistor, the resistance of which changes whenever a physical pressure or stress is applied on the sensitive area. FSR is a becoming highly common in projects where mechanical force results in a specific action.
15 Thermal Sensor Module
It is an easy to use NTC (negative temperature coefficient) based interface module used to sense the ambient temperatures. It is highly sensitive and adjustable to a particular threshold. Made out of semiconductor materials, it also has a potentiometer knob and thermistors for the best readings. It is Useful in applications that require temperature detection and control.
Buy the Best Arduino Sensors
As IOT or Internet of things products is becoming famous, more and more applications and projects are being built using Arduino. The convenience of using these sensors is also increasing with the escalating demand. So this has resulted in constant development in the sensor industry. So the above-mentioned sensors are among the commonly used in Arduino based projects.