AC automatic voltage regulator circuit made by LM339

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description:

The LM339 is a circuit that integrates four operational amplifiers, referred to as a quad op amp integrated circuit, also known as a four-voltage comparator, which can be used to amplify analog signals, process digital signals, make various oscillators, and Kinds of control circuits, etc., are extremely widely used.

The following describes an AC automatic voltage regulator fabricated by LM339.

The AC automatic voltage regulator circuit made by LM339 is composed of DC power supply circuit, regulated power supply, circuit, reference voltage circuit, sampling voltage circuit, voltage comparison circuit, logic control circuit and voltage regulation circuit.

The DC power supply circuit is composed of WH0812 type AC-CD conversion module A1, filter capacitors Cl and C2.

The regulated power supply circuit is composed of LM7805 type three-terminal voltage regulator integrated circuit A2 and filter capacitors C3 and c4.

The reference voltage circuit is composed of RP2 or the like.

The sampling voltage circuit is composed of a 6V Zener diode VD, a resistor R3/R4/R5, and an adjustable potentiometer RPl.

The voltage comparison circuit is composed of an LM339 type four operational amplifier integrated circuit A4 or the like.

The logic control circuit is composed of a CD4070 type XOR gate integrated circuit A3, and bias resistors R1, R2, R6, and R7.

The voltage regulation circuit consists of HS220-1 solid state relay KI-K3.