Abstract
In modern large cities, the huge streetlamp system costs so much power, and it must be on work all the night to meet the need of safety, so it is valuable to save energy resources. There are three ways--keep certain lightness, adopting low-power-cost products, and a better control system. The last one will save energy effectively. It works by the drives of the single chip computer, electric electron technology controlling voltage and low voltage electric equipments to save power. The control system will turn down the high night voltage to a usual level. The useful control can adjust voltage, turn on and turn off lights. By now, it is widely used in modern cities and the technology has been advanced, and PWM is one of the technologies. It is more effectively, and crates less harmonic wave pollution than usual method. According to the application characteristic of KA3525，we have designed a kind of PWM control circuit based on KA3525 with the auxiliary of one—chip computer，realized steady voltage and adjustable out putting voltage．
Keywords power saving of streetlamp steady voltage power PWM single chip computer KA3525
