Abstract

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A STUDY ON AUTOMATIC DUAL AXIS SOLAR TRACKER SYSTEM USING 555 TIMER

Shrishti Rana


This automatic dual axis solar tracker system is a design and implementation of a polar single axis solar panel tracker. It has a fixed vertical axis and an adjustable horizontal motor controlled axis. This setup is similar to an office swivel chair. The tracker actively track the sun and change its position accordingly to maximize the energy output. To prevent wasting power by running the motor continuously, the tracker corrects it's position after 2 to 3 degrees of misalignment. The sensors compare the light intensities of each side and move the panels until the tracker detects equal light on both sides. Additionally, it prevents rapid changes in direction that might be caused by reflections, such as cars passing by. A rear sensor circuit is also incorporated to aid in repositioning the solar panels for the next sunrise. The gear motor has overturn triggers to prevent the panel from rotating 360° and entangling wires. The motor control and sensing circuitry runs on batteries charged by the solar panel. This system uses three small 10W solar panels of approximately 15 inches by 10 inches to model larger panels used in industry.