Abstract

• The solar panel charging controlled system is designed and constructed using the microcontroller and light sensor. The design of solar panel charging controlled system consists of a mid-range PIC microcontroller (PIC16F877A), an alphanumeric liquid crystal display, a crystal oscillator and a 5V relay. The controller circuit was operated by a 5V dc power supply. Microcontroller checks the specified minimum and maximum voltage or less than voltage of battery. If the battery voltage is lower than the predetermined minimum or maximum voltage, battery is charged. If the battery voltage is greater than the maximum voltage, the charging circuit is cut off via relay. This can be saved the battery life span and prevent from the setting fire.