Introduction: Heart Rate Monitor Circuit Using Photoplethysmography (PPG)

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Heart rate is a vital physiological parameter that reflects the health and fitness of an individual. Accurate and non-invasive heart rate monitoring is crucial in medical diagnostics and sports science. The principle of photoplethysmography (PPG) offers a convenient way to measure heart rate by detecting blood flow variations. This project demonstrates the development of a heart rate monitor circuit that employs PPG using basic electronic components such as an LED and an IR receiver.


Step 1: Introduction

Heart rate is a vital physiological parameter that reflects the health and fitness of an individual. Accurate and non-invasive heart rate monitoring is crucial in medical diagnostics and sports science. The principle of photoplethysmography (PPG) offers a convenient way to measure heart rate by detecting blood flow variations. This project demonstrates the development of a heart rate monitor circuit that employs PPG using basic electronic components such as an LED and an IR receiver.

For Full Project:

https://electronicsworkshops.com/2024/11/13/heart-rate-monitor-circuit-using-photoplethysmography-ppg/


Step 2: Objectives

  1. To design and implement a non-invasive heart rate monitor using PPG.
  2. To process the signal variations caused by blood volume changes.

Components Required

  1. LED (Light Emitting Diode): Emits light to pass through the body part.
  2. IR Receiver: Detects variations in light intensity.
  3. Microcontroller (e.g., Arduino or any suitable microcontroller): Processes the signal and calculates the heart rate.
  4. Operational Amplifiers: Amplify the weak signals received from the IR receiver.
  5. Low-Pass and High-Pass Filters: Remove noise and extract the relevant signal.
  6. LCD Display: Displays the calculated heart rate.
  7. Resistors and Capacitors: For circuit stability and filtering.
  8. Power Supply: To power the circuit components.

PCB Manufacturer

PCBWAY is a highly skilled company specializing in PCB manufacturing. They offer their services at incredibly low prices, such as providing 10 PCBs for only $5. Additionally, new members receive a $5 bonus. The website allows customers to upload their Gerber Files and place orders.

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PCBWAY is known for producing PCBs of exceptional quality and maintaining high standards, which is why many people trust them for their PCB and PCBA needs.

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Step 3: Principle of Operation

Step 4: Applications

  1. Healthcare: Monitoring patients’ heart rates in hospitals or at home.
  2. Fitness: Tracking heart rates during exercise or sports activities.
  3. Research: Studying physiological responses to various stimuli


For Full Project:

https://electronicsworkshops.com/2024/11/13/heart-rate-monitor-circuit-using-photoplethysmography-ppg/


Conclusion

The heart rate monitor circuit based on PPG offers a practical and cost-effective solution for measuring heart rates non-invasively. By utilizing simple components and a straightforward design, this project can be expanded and integrated into wearable technologies for continuous health monitoring. Future improvements could involve reducing motion artifacts, enhancing signal processing, and integrating wireless data transmission for remote monitoring