Space-based Proton-Electron Energy Detector (SPEED) is a payload that is being developed to be launched onboard the Indian Institute of Technology Madras (IIT Madras) nano-satellite (IITMSAT). The scientific objective of the payload is to gather data on the variations in the charge particle flux below the inner Van Allen radiation belts. SPEED is designed to obtain energy spectra of high-energy protons and electrons, specifically designed to investigate correlations between variations in these spectra and seismic activity, solar flares and lighting storms. In this paper, we will present the design of the electronics and transducer system of SPEED. © 2015 IEEE.