as well as a passive infrared (PIR) sensor, a potentiometer, and a LED lighting module. The solar panel powering each system has a capacity of 2 W and charges a 3.7 V Li-ion battery during the day ...

Instead of sunlight, however, this design uses an LED to provide the light, for decorating a garden or for use when out camping or traveling. In this design, a solar panel is used to charge a ...