Rancang Bangun Alat Ukur Curah Hujan Dengan Metode Timbangan Menggunakan Sensor Fototransistor Berbasis Arduino Uno

Abstract

The measuring instrument of rainfall with weightscale system using phptotransistor NPN type, designed for measuring the value of rainfall wich fell down with using LED light. The instrument designed using data processor Arduino Uno, timer DS1307, and micro SD The testing instrument was do in BMKG Bandara Radin Inten II South of Lampung. The analog data has results by phototransistor will be processed by Arduino Uno and the results data of rianfall which saved in the micro secure digital and displayed by the Liuquid Crystal Dislay (LCD) with delay 1 second. The control system instrument using a valve solenoid with volume reference 500 ml. The instrument resolution has results was equal 0,19 mm and the instrument capable to read the minimum of vilume change up to 2 ml. Avarage of error from measuring instrument was equal to 5,7 %.