<![CDATA[ABSTRAKTelah dilakukan perancangan solar tracker menggunakan empat buah sensor LDR untuk mengindera arah gerak matahari. Solar tracker digunakan untuk menggerakkan sel surya agar mengikuti arah gerak matahari. Rangkaian elektronik terdiri dari rangkaian catudaya, rangkaian mikrokontroler ATmega8535, LCD, rangkaian driver motor stepper, dan rangkaian sensor LDR. Rancangan mekanik menggunakan dua sumbu putar dengan motor stepper tipe unipolar sebagai penggerak agar sel surya dapat mengikuti gerak semu harian matahari (dalam arah timur-barat) dan gerak semu tahunan matahari (dalam arah utara-selatan). Sel surya yang digunakan adalah Amorphous 10 V/30 mA. Hasil pengukuran menunjukkan kenaikan tegangan sel surya mencapai 11,53% dibandingkan yang tidak menggunakan solar tracker sedangkan tegangan maksimumnya naik 1,18 V dibandingkan yang statis.Kata Kunci : sensor LDR, sel surya, solar tracker, mikrokontroler ATmega8535, LCDAbstractThis research aims to design a solar tracker using a four-quadrant LDR that used for sensing the position of the sun. Solar tracker is the tools used to follow the direction of motion of the sun. The electronic circuits consisting of a power supply circuit, microcontroller ATmega8535 and LCD circuit, stepper motor driver circuit and LDR sensor circuit. The mechanical design using dual axis with stepper motor as an actuator to position the solar cell tilted appropriately to face the sun directly at all times by tracking daily apparent motion of the sun (east-west motion) and yearly apparent motion of the sun (north-south motion). Solar cell that used is amorphous 10V/30mA. The result shows that the solar tracker use has increased the maximum voltage up to 11.53 % compared to the static solar cell.Keywords : LDR, Solar cell, solar tracker, microcontroller Atmega8535, LCD]]>
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