Ravella chandra Varsha

ECG Classification using IIR Filters

Developed an ECG signal-processing system using IIR filters for noise reduction and QRS complex extraction. Implemented feature extraction techniques to support arrhythmia detection

Graded-Index Optical Fiber pH Sensor

Simulated and analyzed a graded-index optical fiber pH sensor using COMSOL Multiphysics. Studied optical transmission, refractive-index changes, and sensing efficiency

Coal Monitoring System

Designed a coal monitoring system using sensors, microcontrollers, and wireless communication. Monitored flow rate, temperature, and gas emissions to support operational safety

Water Level Detection System

Developed an LED-based water level indicator using BC547 transistors, three color-coded LEDs, and conductive probes. Demonstrated transistor switching for water level detection in a practical sensing application