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While Indonesia is a big country with very high seismic activities, the needed of seismograph is very important to monitor those seismic activities. Nowadays, Indonesia National Agency for Meteorology and Geophysics need more quantity new digital seismograph at some new stations and replace other old and bulk analog seismograph. The 24 bit digital seismograph herein is a first edition designed as a portable, compact and reliable instrument.1. Introduction1.1. OverviewIndonesia recently has some...