Heart Beat Sensor basic

https://www.electroschematics.com/heart-rate-sensor/Enable GingerCannot connect to Ginger Check your internet connection
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https://www.elprocus.com/heartbeat-sensor-working-application/

https://www.vegascreativesoftware.info/us/forum/ms-to-bpm--28217/

https://www.edaboard.com/threads/heartrate-monitor-bluetooth.309936/

http://server.8051projects.net/t62545-p30/project-doubts/bluetooth-heart-rate-monitor.htm

file:///Users/PUPUTDANI/Downloads/sunrom-809200%20(1).pdf

http://www.sengpielaudio.com/calculator-bpmtempotime.htm

http://www.sengpielaudio.com/calculator-bpmtempotime.htm

Clasification of Heart Beat

https://www.sciencedirect.com/science/article/pii/S2314717216300265

Age span	Heart rate (bpm)
Less than 1 month	120–160
1–12 months	80–140
12 months – 2 years	80–130
2–6 years	75–120
6–12 years	75–110
More than 12 years	60–100

op amp for heart beat

http://www.johnhenryshammer.com/TEChREF/opAmps/opamps.html

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