Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller interfaced with a MAX30100 sensor module and a set of resistors. The MAX30100 is an integrated pulse oximetry and heart-rate monitor sensor solution. The circuit utilizes I2C communication protocol facilitated by pull-up resistors to connect the sensor to the microcontroller. Additionally, an interrupt line is connected to the Arduino UNO to handle events from the MAX30100 sensor.

Component List

Resistor

• Description: A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Purpose: In this circuit, resistors are used as pull-up resistors for the I2C communication lines and the interrupt line from the MAX30100 sensor to the Arduino UNO.
• Properties: 1200 Ohms

MAX30100 Sensor Module

• Description: The MAX30100 is an integrated pulse oximetry and heart-rate monitor sensor module. It includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient light rejection.
• Purpose: To measure pulse oximetry and heart rate in this circuit.

Arduino UNO

• Description: The Arduino UNO is a microcontroller board based on the ATmega328P. It has a variety of digital and analog I/O pins.
• Purpose: To serve as the central processing unit of the circuit, interfacing with the MAX30100 sensor module and executing the embedded code.

Wiring Details

Resistor

• Connections:
  • One end connected to the 3.3V power rail from the Arduino UNO.
  • The other end connected to the respective I2C communication line (SCL or SDA) or the interrupt line (INT) of the MAX30100 sensor module.

MAX30100 Sensor Module

• Connections:
  • Vin connected to the 3.3V power rail through a resistor.
  • gnd connected to the GND pin on the Arduino UNO.
  • scl connected to the SCL pin on the Arduino UNO through a resistor.
  • sda connected to the SDA pin on the Arduino UNO through a resistor.
  • int connected to the D2 pin on the Arduino UNO through a resistor.

Arduino UNO

• Connections:
  • 3.3V providing power to the MAX30100 sensor module and the resistors.
  • GND connected to the ground pin of the MAX30100 sensor module.
  • SCL connected to the SCL pin of the MAX30100 sensor module through a resistor.
  • SDA connected to the SDA pin of the MAX30100 sensor module through a resistor.
  • D2 connected to the INT pin of the MAX30100 sensor module through a resistor.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Notes

• The provided code is a template and does not include specific initialization and logic required to interface with the MAX30100 sensor module.
• The user should implement the I2C communication setup in the setup() function and the main logic to read data from the MAX30100 sensor in the loop() function.
• Interrupt handling for the MAX30100 sensor should be implemented and linked to the D2 pin on the Arduino UNO.