LED sign decorative light(3)

Published:2011/7/20 0:13:00 Author:chopper | Keyword: LED sign, decorative light | From:SeekIC

This example describes light-controlled LED sign decorative light which adopts divided components.And it does not work during the day, and automatically lights up at night, which is of traits like low power consumption, long life, maintenance-free, easy to make and so on. 　　The principle of circuitThe LED sign decorative light circuit is formed by the power supply circuit, light-controlled circuit and LED display circuit,which is shown in Figure 1-155. 　　The power supply circuit is formed by the capacitor C1, rectifier diode VD, voltage regulator diode VS and filter capacitor C2.



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