Battery size optimization strategies for the solar powered led lights

Light emitting diodes (LEDs) are recently preferred for the implementations of low-energy consumption illumination systems because of their non-thermal light production effect. Solar rechargeable batteries can be used to power Light emitting diodes lights (LED-lights), but their costs increase with their charge storage capacity. Electric lights are often required to operate for a period that do not exceed 24 hours and are only mainly necessary to operate whenever there is a nearby person. In this study, a microcontroller that is interfaced with the Light Dependent Resistor (LDR) and a Passive Infra-Red sensor (PIR) will detect the presence of moving bodies and darkness to switch on LED lights for a predetermined period. The microcontroller code and hardware has been designed to optimize energy consumption by enabling low microcontroller clocking frequency and sleep mode features. A Data Acquisition System (DAS) has been used to assist with the evaluation of a solar site in question. The use of LDR, PIR, a DAS, low clocking frequencies and sleep mode feature of the microcontroller has made it feasible to use less capacity solar rechargeable battery for the supply of LED lighting system over longer periods.