Thyristor shifting autotransformer AC power supply circuit

  
It consists of two LM339 comparator and two CD4070 XOR gate thyristors and other components autotransformer exchange regulator, the circuit also has overvoltage and undervoltage protection. Adjust the potentiometer RPi or change the P position, the control range can be changed.
Thyristor shifting autotransformer AC power supply circuit - schematic




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