K.C. Bhandari, was Associate Professor of Physics, M.L.S. University, Udaipur. He has put in 33 years service while teaching the subject right from the undergraduate to postgraduate level. He has also been associated with the summer institutes / workshops for college level / school level teachers, arranged under the auspices of UGC. His special interest in electronics and development of experiments are based on it. He is author and co-author of several books at the undergraduate level.