eimerdcg / Planned Maroon P.K.E. Meter

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Heart Rate Measurement Circuit

flux

1:28

Below is a proposed schematic idea for your circuit. It will include the following key parts:

Table

PartDescriptionLink
Arduino UnoActs as the main controller reading the sensor output and driving the LCDArduino Uno
16x2 LCD DisplayDisplays the calculated average pressure (or a related value)16x2 LCD display
Piezo SensorSenses vibrations or pressure changes from the piezoelectric device which can be correlated to heart impulsesPiezo Sensor
Ground (GND)Provides the common reference for the circuit. (Remember to use the ground component found in Flux with UID: c2e41937-4268-256c-7ae9-cb8cfb60aed3)GND
Schematic Connection Overview
  • Sensor Interface:
    • The Piezo Sensor has two terminals. Connect its output terminal to one of the Arduino’s analog inputs (e.g. A0).
    • Tie the sensor’s other terminal to GND.
  • Arduino Interface to LCD:
    • Connect the LCD Display to the Arduino. If using a standard parallel interface, connect the data lines (D4–D7), RS, E, and optionally R/W (tied to ground for write-only) to free digital I/O pins of the Arduino.
    • Ensure the LCD’s power pins (VCC and GND) are supplied by the Arduino’s regulated 5V and ground – include decoupling capacitors if needed.
  • Power Connections:
    • Tie all grounds (Arduino, piezo sensor, LCD) together using the GND component.
    • Provide the proper regulated voltage (5V from the Arduino) to power the sensor and LCD.
Next Steps
You can now add these components to your schematic and wire them accordingly. After placing them, proceed to define the nets so that the Piezo sensor’s output is connected to the Arduino’s analog pin and the LCD’s interface pins are properly connected.
This setup will allow the Arduino to sample the piezo sensor signal, process measurements to determine the heart rate or average pressure, and then display the result on the LCD.
Would you like to proceed by adding these components to your Flux project?
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