Solar Garden Light

Published:2011/7/23 10:37:00 Author:John | Keyword: Solar Garden Light | From:SeekIC

Solar garden light is as shown. When there is sunlight in the day, light energy is transferred into electrical energy by BT1. And BT2 charges the VD1. Due to the light, photosensitive resistor is with low resistance. VQ4 b closes due to very low electrical level. When there is no light at night, the photosensitive resistor is with high resistance. So VQ4 conducts. VQ2b also conducts due to very low electrical level. When the DC boost circuit composed of VQ3, VQ5, C2, R6 and L1 starts to work, LED powers to get light. The core of the DC boost circuit is a complementary tube oscillator circuit.



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