Heart Rate Monitoring System using Arduino with LCD display
The heart rate monitoring system using Arduino with LCD display works by measuring the change in light from the expansion of capillary blood vessels. The pulse sensor module detects this change in light and sends a signal to the Arduino.
MAX 30102 Heart Rate Sensor
VIN is the power pin. You can connect it to 3.3V or 5V output from your Arduino.
SCL is the I2C clock pin, connect to your Arduino’s I2C clock line.
SDA is the I2C data pin, connect to your Arduino’s I2C data line.
GND is Connected with Arduino Ground
Block Diagram Block Diagram
The heart rate monitoring system using Arduino with LCD display works as follows:
- When you place your finger on the pulse sensor module, the light from the infrared LED shines through your skin and onto the phototransistor.
- As your heart beats, the blood vessels in your finger expand and contract, which causes the amount of light reflected back to the phototransistor to vary.
- The pulse sensor module converts the changes in light into an electrical signal.
- The Arduino reads the electrical signal from the pulse sensor module and calculates the heart rate.
- The Arduino then displays the heart rate on the LCD display.
The heart rate calculation algorithm used by the Arduino is based on the following principles:
- Every heartbeat produces a pulse wave that travels through the blood vessels.
- The pulse wave causes a change in the electrical impedance of the blood vessels.
- The pulse sensor module measures the change in electrical impedance and converts it into an electrical signal.
- The Arduino calculates the heart rate by measuring the frequency of the pulse wave signal.
The heart rate calculation algorithm used by the Arduino is not perfect, but it is accurate enough for most applications. The accuracy of the heart rate calculation can be improved by using a more sophisticated algorithm and by using a better quality pulse sensor module.
Overall, the heart rate monitoring system using Arduino with LCD display is a simple and effective way to monitor your heart rate. It is a good project for beginners to learn about electronics and programming.