Self-powered solar tracker

A self-powered solar tracker comprising:

• an altitude adjustment optical sensor unit comprising one or more first optical sensors formed on an upper side of a first convex support surface to face the sun and one or more second optical sensors formed on a lower side of the first convex support surface, the altitude adjustment optical sensor unit being configured to sense sunlight so as to adjust an altitude of a solar collector panel;
• a horizontal rotation optical sensor unit comprising one or more third optical sensors formed on a left side of a second convex support surface to face the sun and one or more fourth optical sensors formed on a right side of the second convex support surface, the horizontal rotation optical sensor unit being configured to sense sunlight so as to horizontally rotate the solar collector panel;
• a passive element circuit comprising one or more first comparison circuits for comparing a difference in output light intensity between the first optical sensors and the second optical sensors and one or more second comparison circuits for comparing a difference in output light intensity between the third optical sensors and the fourth optical sensors, and to output a driving value for adjusting the altitude of and horizontally rotating the solar collector panel in a direction having a larger light intensity value;
• an altitude adjustment driving unit configured to receive a driving power source from solar cells of the solar collector panel and to adjust the altitude of the solar collector panel in response to the driving value of the passive element circuit;
• and
• a horizontal rotation driving unit configured to perform the horizontal rotation,
• wherein the horizontal rotation optical sensor unit further comprises one or more fifth optical sensors being disposed on the second convex support surface, the horizontal rotation optical sensor unit being configured to be adjusted such that one or more fifth optical sensors are positioned on a side of the second convex support surface that is opposite to a light incident side.