Heart Rate Pulse Sensor Module Unsoldered Wire

Features:

• Accurate Heart Rate Monitoring: Uses optical sensing to provide real-time heart rate data with high reliability.
• Plug-and-Play Compatibility: Easily integrates with Arduino and other microcontrollers without the need for complex wiring.
• Compact and Versatile: Ideal for wearables, fitness trackers, and health monitoring systems.
• Low Power Consumption: Suitable for battery-powered applications with efficient energy usage.
• Integrated Amplification and Noise Filtering: Enhances measurement accuracy by minimizing interference.
• User-Friendly Design: Heart logo guides finger placement. Green LED and ambient light sensor improve signal detection.
• Reverse Protection Diode: Protects the module from damage due to reverse polarity connections.

Principle of Work:

1. Optical Sensing: Infrared light emitted into the skin reflects changes in blood volume back to a photodiode.
2. Blood Volume Changes: Light absorption fluctuates with each heartbeat, affecting the reflected light intensity.
3. Amplification and Filtering: Internal circuits amplify the signal and reduce external noise.
4. Signal Processing: The signal is processed to extract real-time heart rate information.
5. Output: Analog output is sent to a microcontroller for data display or transmission.

Pinout of the Module:

• VCC: Connect to 3.3V or 5V power supply
• GND: Connect to ground
• Signal: Analog output to microcontroller (e.g. A0)

Applications:

• Wearable fitness devices and trackers
• Medical monitoring (e.g. patient heart rate monitoring)
• Biometric authentication systems
• Emotion and stress detection
• Human-computer interaction and research
• Gaming and VR-based physiological feedback
• IoT health monitoring systems

Circuit Diagram:

Library:

No external library required.

Arduino Code:

const int PulseSensorPurplePin = A0; // Pulse sensor connected to A0
const int LED13 = 13; // On-board LED
int Signal; // To store raw pulse data
const int Threshold = 550;

void setup() {
  pinMode(LED13, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  Signal = analogRead(PulseSensorPurplePin);
  Serial.println(Signal);

  if (Signal > Threshold) {
    digitalWrite(LED13, HIGH);
  } else {
    digitalWrite(LED13, LOW);
  }

  delay(10);
}

How It Works (Code Explanation):

1. Reads analog data from the sensor via pin A0.
2. Prints raw signal to the Serial Monitor or Plotter.
3. Turns on the LED if the signal exceeds the threshold (heartbeat detected).
4. Turns off the LED otherwise.
5. Includes a short delay for smooth performance.

Technical Details:

• Dimensions: 16mm diameter, 3mm thickness
• Operating Voltage: 3–5V
• Current Draw: 4 mA at 5V
• Cable Length: 18 cm
• Connections: VCC, GND, Signal (Analog Out)

Comparisons:

Resources:

• Pulse Sensor Tutorial on Instructables
• Official PulseSensor Website