Pranab Rebatiranjan Dastidar (10 July 1933 â 11 February 2022) was an Indian electronics engineer and nuclear physicist. He was a director of Bhabha Atomic Research Center. Dastidar led the Electronic Detonation System in Smiling Buddha project, India's first ever nuclear bomb test. He received Padma Shri in 1975. He died in California on 11 February 2022.