Relay module

    This module includes relay drive circuit, power supply circuit, rectifier circuit, resistance-capacitance absorption circuit and other parts. It can be used in circuits with small voltage and small current to control large voltage and large current (the voltage and current should not exceed the marked value of the relay). The resistance-capacitance circuit has a certain inhibitory effect on the sparks and peak voltage generated by the opening and closing of the contacts; however, the resistance-capacitance circuit The presence of the circuit prevents the circuit from being completely disconnected, so please do not touch any part of the PCB unless the power is completely cut off, even if the high and low voltage areas are isolated.
    The power circuit of this module adopts a three-terminal voltage regulator design, allowing external power supply. The input rectifier part can be connected to an external capacitor or other filter circuit according to the ripple requirements.
    This module is equipped with self-restoring insurance. When the control circuit is overloaded or short-circuited, the power supply can be cut off in time to prevent larger-scale failures.
    The input power supply of this module can be DC or AC (7V ≤ input ≤ 35V). It is equipped with a rectifier circuit and does not need to distinguish between positive and negative poles, making wiring easy.
The project attachments are schematic diagrams and Gerber files