节日装饰性彩灯一般使用220伏15瓦彩色灯泡,如装饰一幢楼往往需数百只灯泡,常亮送电时,耗电数千瓦之多,艺术效果却不理想。下面介绍一种简易控制电路,可用来改造旧有建筑物的彩灯控制,实现良好的艺术效果。电路见附图:RC1A为单插保险;B为电源降压变压器(20伏安);二极管2 CZ2和电容C1构成半波整流电源;低压 Holiday decorative lanterns generally use 220 volt 15 watt colored light bulbs, such as decorating a building often requires hundreds of light bulbs, constant power, power consumption of thousands of watts as much as artistic effects are not ideal. The following describes a simple control circuit that can be used to retrofit old building lanterns and achieve good artistic effects. Circuit see the drawing: RC1A is a single plug insurance; B is a power step-down transformer (20V); diode 2 CZ2 and capacitor C1 form a half-wave rectifier power supply;