How MAX30102 Pulse Oximeter and Heart Rate Sensor Works

 The MAX30102 is a very versatile sensor and it can also measure body temperature other than heart rate and blood oxygen level. This is a sensor designed by Analog Devices and features  two LEDs (one Infrared and one Red), a photodetector, optics, and low-noise signal processing unit to detect pulse oximetry (SpO2) and heart rate (HR) signals. 

The main idea is that you shine a single LED at a time and check the amount of light that is getting reflected back to the sensor. Based on the reflection you can determine the blood oxygen level and heart rate. 

We can interface MAX30102 sensor with any microcontroller or development board to get the SpO2 or heart rate values. Here is the complete tutorial which covers how to interface MAX30102 sensor with Arduino.

Getting Started with Arduino - Tutorial Series for Beginners

The name Arduino is typically buzz word among most of the electronics students or hobbyists alike. Its ability to build things faster and cheaper with a massive online community support has made it an ideal choice for many people who are just getting started with electronics or programming. Because of its simplified hardware design and programming environment, it is possible even for people without any electronics or computer science background to learn it with ease. So here we have compiled a list of tutorials which will help you learn the basics of Arduino and then get started with Arduino to build few basic projects.

Tutorial 1 - Arduino Basics

Tutorial 2 - Different Types of Arduino Boards

Tutorial 3 - Different Ways to Power Your Arduino

Tutorial 4 - Getting Started with Arduino IDE

Tutorial 5 - Arduino Timers

Tutorial 6 - Arduino ADC

Tutorial 7 - Arduino SPI

Tutorial 8 - Arduino I2C

Tutorial 9 - Interfacing Push Button and LED

Tutorial 10 - Arduino Seven Segment Display

Tutorial 11 - Arduino Interrupts

Tutorial 12 - Arduino Sleep Modes

Tutorial 13 - Arduino IR Sensor

Tutorial 14 - Arduino Soil Moisture Sensor

Tutorial 15 - Arduino PIR Sensor

Tutorial 16 - Arduino Ultrasonic Sensor

Tutorial 17 - Arduino MQ2 Gas Sensor

Tutorial 18 - Arduino 16x2 LCD Display

Tutorial 19 - Arduino Rain Sensor

Tutorial 20 - Arduino Flex Sensor

Once you have gone through the basics of Arduino tutorials there are a vast variety of projects you can try and build. You can find many interesting arduino based projects ideas here. 

How Rain Sensor Works & How to Use it with Arduino

The raindrop sensor also known as rain detector sensor is an easy-to-use device that can detect rainfall. It acts as a switch when raindrops fall on the sensor, other than that with slight tweaks in the code, it can also measure the intensity of the rainfall. This sensor also has a separate indicator led and an onboard potentiometer through which you can adjust the sensitivity of the output digital signal provided by the sensor.

Check out the full tutorial to interface rain sensor with Arduino

Interfacing an IR Sensor and Soil Moisture Sensor with Arduino Uno

If you are a beginner and have recently started working with Arduino, you would like to learn and experiment interfacing it with few basic sensors. Or you might be planning to build a smart farming project or one which requires IR sensor? In this post we will share a few of recently published arduino tutorials which covers interfacing these sensors with arduino from a beginners point of view. So have a look to below tutorials.

1. Interfacing IR Sensor Module with Arduino

An infrared proximity sensor or IR Sensor is an electronic device that emits infrared lights to sense some aspect of the surroundings and can be employed to detect the motion of an object. As this is a passive sensor, it can only measure infrared radiation. This sensor is very common in the electronic industry and if you’ve ever tried to design an obstacle avoidance robot or any other proximity detection-based system, chances are you already know about this module, and if you don’t, then follow this arduino IR sensor interfacing article as here we will discuss everything about it.

2. How Does a Soil Moisture Sensor Work and how to use it with Arduino?

The soil moisture sensor is the first thing that springs to mind when it comes to building your smart irrigation system or automatic plant watering system. With this sensor in place and a little Arduino support, we can design a system that can water your plants when it's needed, avoiding overwatering and underwatering.

In this article, we are going to interface the soil moisture sensor with an arduino and measure the volumetric concentration of water inside the soil. This sensor is designed in a way that it can output data in both digital and analog modes. We will read this data and display the output status with an LED for digital output and we will use the serial monitor or an LED with PWM for analog output. Check out the full Arduino Soil Moisture Sensor tutorial here.