The Arduino community has created a wide variety of sensors modules and shields that can enhance your DIY projects.
If you want your Arduino board to sense the world around it, you will need to add a sensor. There are a wide range of sensors to choose from and each of them has a specific purpose. In this guide we are going to show you some of the commonly used sensors in Do-It-Yourself (DIY) projects you can buy for less than 2 USD. We also have instructions on how to use most of them with the Arduino boards.
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Tag: Project 005 Arduino sensors for less than 2 usd
The HC-SR04 Ultrasonic Sensor is a very affordable proximity/distance sensor that has been used mainly for object avoidance in various robotics projects. It essentially gives your Arduino eyes / special awareness and can prevent your robot from crashing or falling off a table. The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package.
Infrared IR Sensor Obstacle Avoidance Sensor is an inexpensive solution to avoidance detection for robotics, smart car and other electronics uses. These sensors have a digital output pin that outputs a signal when it detects an object. When the module detects an obstacle, the green indicator light on the board lights up.
The soil moisture sensor or the hygrometer is usually used to detect the humidity of the soil. So, it is perfect to build an automatic watering system or to monitor the soil moisture of your plants. It outputs a high signal when the moisture is above a certain threshold. You can also read an analog signal whose value is proportional to the moisture level. Use this sensor to create an automatic self-watering plant.
4. Microphone Sensor KY-038 or KY-037 or LM393
This sensor is used for sound detection. This module has two outputs: AO (analog output), or DO (digital output). The digital output sends a high signal when the sound the sound intensity reaches a certain threshold. The threshold-sensitivity can be adjusted via potentiometer on the sensor.
You can use this module to measure the absolute pressure of the environment. By converting the pressure measures into altitude, you have a reliable sensor for determining the height of your robot or projectile, for example. This sensor also measures temperature and humidity.
You can use this module for light detection with an Arduino.
The thermal sensor module is very sensitive to the ambient temperature, generally used to detect the ambient temperature. Through the adjustment of the potentiometer, you can change the temperature detection threshold.
When you rotate the rotary encoder it counts in the positive direction and the reverse direction. Rotation counts are not limited. With the buttons on the rotary encoder, you can reset to its initial state and start counting from 0.
This sensor module utilizes an MQ-2 as the sensitive component and has a protection resistor and an adjustable resistor on board. The MQ-2 gas sensor is sensitive to LPG, i-butane, propane, methane, alcohol, Hydrogen and smoke. It could be used in gas leakage detecting equipments in family and industry. The resistance of the sensitive component changes as the concentration of the target gas changes.
This module can be used to trigger the effect of various vibration, theft alarm, intelligent car, earthquake alarm, motorcycle alarm, etc. Check our Arduino Guide for vibration sensor.
11. Humidity and Rain Detection Sensor Module FC-37 (YL-83)
This is a rain sensor. It’s used for all kinds of weather monitoring.
A simple sound making module. You set high or low to drive this module. By changing the frequency you will hear a different sound.
13. Speed Sensor Module FC-03
Tachometer is a simple module that allow you to test the speed of the motor. Widely used for motor speed detection, pulse count, position limit, and so on.
Flame detection sensor module is sensitive to the flame, but also can detect ordinary light. This is usually used as a flame alarm. Detects a flame or a light source of a wavelength in the range of 760nm to 1100 nm. Detection point of about 60 degrees, particularly sensitive to the flame spectrum.
15. 5V Relay Module
This is a single channel 5V Relay Module. It allows you to control various appliances that operate at high voltages, with low voltages like 5V. It can be controlled directly by any microcontroller.
A simple module to power your breadboard. It supplies both 3.3V and 5V. This is specially useful to power up your breadboard circuits from an external power supply.
A PIR sensor is a little module that allows you to detect movement from humans or pets. It’s easy to integrate with your microcontroller.
This module measures the acceleration. It’s commonly used in portable devices and video game controllers to detect movement and actions from the player.
It’s a great little sensor to measure temperature and humidity in your room or outside.
If you need data sent from one microcontroller to another, the 433MHz link modules are a cheap way to do that (all data is sent via Radio Frequency).
Instead of getting each module separately, there are a wide variety of kits with different Arduino sensors and modules. Getting one of these kits is a great way to get started with your Arduino.
Need Tutorials to Get Started?
Do you have an Arduino sensor or module and you don’t know how to use it? We have instructions on how to use up to 20 Arduino sensors in our FREE eBook Arduino Sensors. This eBook provides schematics, code, and examples on how to use your sensors with the Arduino.
If you are an absolute beginner in the Arduino world, we recommend you our eBook Arduino for Beginners Step by Step first.
Do you have all these modules? Are you thinking about ordering one of theses modules listed above?
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You may also like the following resources:
- Breadboard Projects Step By Step
- Building Android Apps for Arduino with MIT App Inventor 2
- Csharp Basic Step By Step
Thanks for reading.