The code that this section is attached to uses a timer interrupt to sample the Pulse Sensor with consistent and regular timing. The code is setup to read Pulse Sensor signal at 500 Hz (every 2 ms).

Adding sensors to your Arduino opens up a whole new world of exciting projects. Here are some of the best sensors around. advertisement. MUO. 8 Unique Sensors for Arduino Microcontroller Boards.

This project builds a real-time stress detection system using a PPG sensor and Arduino UNO R4. Pulse data is processed in Python to extract features and predict stress with a Random Forest model.