Compact Arduino Based Pulse Oximeter Sensor Circuit


Introducing our compact and innovative Arduino-based Pulse-Oximeter, featuring a MAX30100 sensor and OLED display for convenient and accurate medical monitoring.

Project Information

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. Explore our latest project, an innovative take on a Pulse-Oximeter sensor. In this unique endeavor, we utilize a MAX30100 sensor and an OLED display to showcase data in a manner similar to a traditional Pulse-Oximeter. Our objective is to streamline the process, employing an Arduino Nano to create a compact and portable device. With a focus on simplicity and usability, this project aims to provide a convenient solution for medical monitoring. Discover our range of previous Covid-19 related projects, including the Human Body Thermometer, Smart IR Thermometer for fever monitoring, and Wall-Mount Temperature Scanner.

Additional Information


  • Arduino IDE
  • Embedded-C


  • The GSM library on the IDE 


  • ESP8266 NodeMCU (ESP32)
  • Arduino uno
  • 5V Relay
  • BC547 Transistor
  • 1N4007 PN Diode
  • Green LED
  • Red LED
  • 1K Resistor
  • 100 Ohm Resistor
  • Push Button
  • Bulb
  • 5V DC Source
  • 220V AC Source


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