Design, implementation and study of an IoT based battery life cycle tester and SoC indicator -- Design and Integration of Collaborative Features along with an Efficient GUI to the Industrial ROBOT -- Design of a CMOS Filter for basenoise Removal of ECG signal -- Performance study of 81-level inverter using two stage switch ladder circuit -- Design of Error tolerant and Low power Approximate full Adder -- Degradation of optical communication system performance due to SPM -- Real time measurement and analysis of power quality issues in distribution system.