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![Pulse Sensor or Heart rate measurement using Arduino & Bluetooth](https://i2.wp.com/www.electroniclinic.com/wp-content/uploads/2019/05/pulse-sensor-heartbeats-rate-monitoring-using-arduino-and-bluetooth-circuit-diagram.png?fit=4072%2C2525&ssl=1)
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![Heart rate monitor with SMS alert](https://i2.wp.com/www.circuitstoday.com/wp-content/uploads/2016/06/heart-rate-monitor-GSM.png)
![Circuit diagram of Heart rate sensor | Download Scientific Diagram](https://i2.wp.com/www.researchgate.net/profile/Sharanbasappa-Sali/publication/322001355/figure/fig1/AS:574684283576320@1514026818941/Circuit-diagram-of-Heart-rate-sensor_Q320.jpg)
![Heart Rate Sensor - ElectroSchematics.com](https://i2.wp.com/www.electroschematics.com/wp-content/uploads/2019/09/3-Optical-Heart-Rate-Monitor-DIY-Circuit.jpg)
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![How to make Heart Rate Monitor - Techatronic](https://i2.wp.com/techatronic.com/wp-content/uploads/2020/04/IMG_20200426_172321-e1608359760945-1024x772.jpg)
![mcatutorials.com | IOT Based Heart Defect Monitoring System Using ECG](https://i2.wp.com/mcatutorials.com/images/iot-projects/iot-based-heart-monitoring-system-using-ecg/IOT-Based-Heart-Monitoring-System-Using-ECG.png)
![How to Build a Heart Rate Monitor, Alarm Circuit](https://i2.wp.com/makingcircuits.com/wp-content/uploads/2015/07/heart2Brate2Bprocessor2Bcircuit.png)