Sensor-Arduino Heartbeat

• A heartbeat sensor is included in the Arduino sensor set of 37.
• The name makes too many promises.
• People often think that it gives out a digital number—the heartbeat rate—through I2C or a similar standard.
• The light sensor's output is merely an "analogue" value between 0 and 1023 that indicates the amount of infrared light it receives—that is, the amount of shade that was detected.
• There is less infra-red light with a greater value.
• To put it briefly, place your finger between the sensor's light transistor and IR led.
• The blood vessels in your finger enlarge with each heartbeat, allowing the IR to be filtered out.
• This produces a signal that pulses.