Real Time Handheld ECG Display

The Real Time Handheld ECG Display project captures electrical signals generated by the heart and visualizes them using an Arduino Uno. The system relies on the AD8232 ECG sensor module, which is designed to extract, amplify, and filter small bio-potential signals. Three 3M ECG adhesive type electrodes are attached to the user's body in a standard single-lead configuration to pick up these electrical impulses. The AD8232 module conditions the raw analog cardiac signals and outputs them to an analog input pin on the Arduino Uno. The Arduino reads these voltage fluctuations in real-time through its internal analog-to-digital converter. Depending on the processed signal parameters, the microcontroller evaluates the heart activity against predefined thresholds. If an abnormal reading or specific trigger condition is met, the system can activate the 3-5V buzzer to provide an audible alert. Connecting wires complete the physical circuit by routing power, ground, and signal data between the electrodes, the AD8232 frontend module, the buzzer, and the Arduino Uno. Programmed entirely through the Arduino IDE, the system demonstrates how analog front-end integrated circuits interface with microcontrollers for physiological data acquisition.