The pulse control device using the relatively advanced WOS digital integrated circuits, elegant appearance, stable performance, significantly improve the reliability of the instrument work, and has a strong anti-interference ability, easy maintenance, etc., in circuit design increased short-circuit automatic protection, LED display circuit, more conducive to long life. 
   The instrument consists of DC voltage, pulse generator, one-shot, digital integrated circuits, gate, gate drive, Triac output, digital display circuit. 
   220V AC half-wave rectified by step, to provide silicon and digital control and display the output voltage pulse. SCR output pulse current start solenoid valve to control the dust removal equipment work. 
   NE555 adjustable pulse count output signal and gating signals. Counting circuit output decoding and ten doors entirely by an MOS digital integrated as. Count input plus an automatic "0" delay count, turn the power on, counting from "0" followed by the output cycle count. Pulse signal input to the gating circuit to control the gate output of the on-time, but also control the SCR conduction time.