Principle circuit of aisle lights that are automatically lit at night

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The photoresistor LDRL detects ambient light and darkness. The CD4060 is an oscillator and a fourteen-level binary counter. After dark, LDR1 resistance increases, T5 is cut off, T2 and T4 are turned on, 4060 third pin potential becomes low, T3 is also turned on, LED2 emits light, and LDR2 is lighted and the resistance becomes small to make T6 turn on. Thus, two-way The thyristor BT136 is triggered to turn the aisle light on. The oscillation frequency of the 4060 can be adjusted to about 1 Hz by VR1, and the state of the Q4 is flipped once every time the binary counter receives 16 pulses. After each 16384 pulses, the potential of the 14 feet becomes high, the thyristor is turned off, and the oscillator is also stopped by connecting D1 to 11 feet.