AC line circuit diagram of photoelectric switch

  
As shown in the circuit to light when the intensity 700lx above action, this time through the

phototransistor and the transistor BFY52 BPX25 to thyristor BTY91 / 800R trigger current. When the light is irradiated on the phototransistor, the trigger pulse is always in the positive half weeks after the starting point occurred about 6 degrees each, by the arithmetic mean of the load flows through the half-wave DC current up to 16A. Regulator BZY88 / C5 and transistor T1 and the resistor 390 is connected to Europe, for limiting the trigger circuit voltage does not exceed 6V. Diode BYX45 / 800R for blocking the negative half-cycle grid voltage, resistors and capacitors 0.1uF 33 Europe for protecting thyristors against overvoltage.




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