Simple Optical Heart Rate Monitor

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Revision as of 19:14, 18 February 2024 by YMT (talk | contribs) (Created page with "Here are some thoughts about the project ==Team members== Yang Meng Ting ==Idea== Photoplethysmography is a non-invasive optical technique used in commercial wearables and pulse oximeters to monitor heart rate. Our goal is to reproduce the core concept with a simple DIY device to gain a better understanding of this technology. ==Setup(Tentative)== ===Equipment=== ::Green LED ::Photodiode ::DAQ devices/Arduino Uno (or other microcontroller if needed) ::[maybe a Basic o...")
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Here are some thoughts about the project

Team members

Yang Meng Ting

Idea

Photoplethysmography is a non-invasive optical technique used in commercial wearables and pulse oximeters to monitor heart rate. Our goal is to reproduce the core concept with a simple DIY device to gain a better understanding of this technology.

Setup(Tentative)

Equipment

Green LED
Photodiode
DAQ devices/Arduino Uno (or other microcontroller if needed)
[maybe a Basic op-amp circuit]
Resistors and capacitors
Breadboard and jumper wires
(Optional) Small display (OLED or LCD)

Circuit Overview

Software

Measurements

Procedure

1. Attach the sensor (LED and photodiode) to a fingertip (or earlobe).

2. Connect the signal output to DAQ devices or microcontroller.

3. Observe the raw PPG signal readings (can be shown in DAQ devices, Arduino's Serial Plotter or other processing software).

4. Observe the calculated heart rate output.

Expected Results

We expect to see a pulsatile waveform corresponding to the heartbeat in the raw data. We can then compare the observed results with those observed by professional heart rate monitor.

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