DIY Light control Blue LED Night Light Kit
The use of light-sensitive resistors and transistors and peripheral circuits to form a light-controlled night circuit.
During the day, light-sensitive resistors R4 becomes larger, the base level of the voltage change of transistor Q1 is high, so the transistor can not be turned on, LED is not working.
At night, light-sensitive resistors R4 smaller base level voltage transistor Q1 becomes lower, so that the transistor is turned on, LED work.
1 x DIY Light control Blue LED Night Light Kit
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