COVID-19 pandemic demanded physical separation of the people. The major challenge is faced by the education sector in teaching learning process. The engineering disciplines like electronics and its allied domains- communication require hands-on practice of the experiments in the laboratory to understand the core concepts. During pandemic, access to the college infrastructure was limited and therefore teaching community have to rely on the virtual laboratories/remote triggered laboratories and simulation software which may be open sourced or licensed. For electronics and telecommunication discipline, integrated circuits, analog, digital and wireless communication courses are the core courses. Most of the learning occurs in the laboratory by doing the experiments and applying the concepts learned in the theory. The use of the virtual platform for teaching these courses; engaging students for laboratory hours and making them learn is a challenge. Authors in this paper have presented step-by-step method for online laboratory conduction, software platforms, and making them interactive, visually appealing and engaging with various activities and tasks. For making platform interactive use of inbuilt functions and commands is made, for making it visually appealing different colour coding, markers, pointers is used in the circuits and waveforms, and for engagement small activities are posted in the chat box of virtual meeting which students have to solve with their designed circuits/programs and post answers/result in the chat box. Use of LTspice (open source) circuit simulator for integrated circuit laboratory and MATLAB and Network Simulator (NETSIM) (licensed) software for the communication related courses is done. The work is presented for the online laboratory sessions for understanding the core concepts virtually without affecting the quality of learning. The feedback and semi-structured interview with students reveal that use of such software platform not only gives learning and engagement but also overcomes the limitations of the traditional laboratories in terms of component availability, equipment range limitation, and error free waveforms. This pedagogical intervention of continuous assessment progressively improved students’ marks for the laboratory experiments.