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Light control flashing warning light circuit

2017-02-04 04:01  
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Light control flashing warning light circuit
The light control flashing warning light will automaticly turn off, and at night ,the light will automaticly turn on. The light control flashing warning light circuit is as shown in the figure. When the power is connected, the 220V city electricity will be half wave rectified by the diode VD1, and it charges the C through R1, so the charging current is small, the warning light E will not turn on. The voltage of capacitance C depends on the R1 and the partial voltage value of the photoconductive resistance RL. In the day time, the photoconductive resistance RL is illuminated by the natural light source, so it has the low resistance, the charging voltage of the capacitance C will not exceed the turning voltage of the two-way trigger diode VD. Light control flashing warning light circuit