How to convert raw pulse sensor data into actual pulse?

1. How do you calculate BPM from a pulse sensor?
2. What is the output of pulse sensor?
3. How do you calibrate a pulse sensor?
4. How do I know if my pulse sensor is working properly?

How do you calculate BPM from a pulse sensor?

Once a valid signal is detected the counting starts for 10 seconds to calculate the BPM using equation: BPM = Count x 6. In other words, the microcontroller is programmed to count the number of beats in 10 seconds, and the result is further multiplied by 6 to obtain the total number of beats per minute.

What is the output of pulse sensor?

The range of output from the Pulse Sensor running at 3.3V is only 0 to 675. We have to scale the Pulse Sensor signal so that it is sized for the larger expected range.

How do you calibrate a pulse sensor?

To calibrate the pulse sensor, you keep on varying the threshold signal from 0 to 1023 while observing the onboard LED blinking sequence and comparing to your own heartbeat got by touching and feeling the pulse in your wrist or neck.

How do I know if my pulse sensor is working properly?

The big red heart in the upper right also pulses to the time of your heartbeat. When you hold the Pulse Sensor to your fingertip or earlobe or (fill in body part here) you should see a nice heartbeat waveform like the one above.