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Open Source Pulse Oximeter

Nanda Siddhardha
5 min readMar 20, 2024

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Things used in this project

Hardware components :

Arduino Nano R3

Maxim Integrated MAX30102 Pulse and Heartrate Sensor

DFRobot Gravity I2C OLED-2864 Display

Software apps and online services:

Arduino IDE

Autodesk Fusion 360

The entire device is designed around an Arduino Nano that is mounted on a piece of 44mm by 30mm perfboard. First, wires get soldered to the VIN, GND, SDA, and SCL pins of the sensor and then run underneath the bed piece to the Arduino Nano.

Next, the connector for the OLED is attached to the Nano and then run up to the display itself.And finally, the entire electronics assembly is slid into the housing and secured with a couple of 3mm screws.

After the electronics have been inserted, simply attach the OLED screen to the top piece and secure it to the rest of the chassis with a couple of 3mm screws. You can test its…

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