![]() Those libraries are included at the beginning of the code. h for the I2C, Adafruit_GFX.h for showing animation on the display, Adafruit_SSD1306.h for the display driver, and Fonts/FreeSerif9pt7b.h for the front. The libraries are MAX30100 Pulse oximeter sensor library, Wire. This code uses many libraries and all are important. Both pins are using a pull-up resistor of 4.7k value. The pin A5 and A4 of the Arduino Nano are connected with pulse oximeter sensor 30100 and OLED Display with the SDA and SCL pins. 5V adequate power supply unit with the rated current of at least 300mA.OLED Display SSD1306 based 128x32 Resolution.OLED Display Components Required to Build Arduino Based Pulse Oximeter Circuit It has a 128圆4 Resolution with a controlling chip of SSD1306. For this project, we are using 1.3 Inch I2C based OLED display. ![]() We are using OLED display as all available pulse oximeter devices available in the market use OLED display. OLED displays are very common in electronics. The pull-up resistors for the I2C pins are included in The above sensor module works with the 1.8V to the 5.5V range. The image given below shows the MAX30100 sensor. The LED current is configurable from 0 to 50mA. It uses photodetectors and optical elements where red or green IR LED modulates the LED pulses. In simple terms, this sensor can identify the oxygen saturation Thus, this module has two integrated functions, Pulse rate monitoring and provides oxygen saturation level of the blood in a non-invasive form. MAX30100 Sensorīefore going directly into the project let’s introduce the major component, the MAX30100 sensor, which is a simple module that communicates with the I2C bus line with the microcontroller and provides the SpO2 and Pulse information to the host microcontroller unit. This is only intended for hobby and learning purposes. Please do not use this to evaluate the patient's condition and always use a proper medical-grade device. However, This project is not for medical purposes. This is the Pulse-Oximeter sensor-based project same as the available medical device. Also, if you are interested in other Covid-19 related projects, you can check out the Human body thermometer, Smart IR Thermometer for fever monitoring, and Wall-Mount Temperature scanner that we build earlier. Previously, we have also built other heart rate monitors using pulse sensors. So that it can be handy to use in the time of need. Our goal is to make the device as compact as possible and smaller in size. The objective of this project is to make the whole process simple, for this reason, we are going to use an Arduino Nano. We will make the project using a MAX30100 sensor and an OLED display that will display the output in the same way as a proper Pulse-Oximeter sensor displays. Now, here in this project, we will do the same thing but differently with a different mindset. There are many pulse-oximeter sensors available in the market for medical purposes, and in one of our previous projects, we also made an IoT-based Heart Rate Monitor where the data is sent from a device to the cloud.
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