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$18.49
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5V 4-Channel Relay Module with Optocoupler Isolation, 4 Way Relay Switch Board Compatible with AVR, 51, PIC Microcontroller Development Projects
- 4 independent relay channels, supports multi-group circuit switching control
- Built-in optocoupler isolation, effectively isolates control circuit and load circuit
- Operating voltage DC 5V, widely matched with common single-chip microcontrollers
- LED indicator for each channel, intuitive status observation during operation
- Compact breakout board design, easy wiring for automation control DIY projects
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This 5V 4-channel relay module integrates four independent relay switches with optocoupler isolation circuit. It serves as a common switching driver module for microcontroller development, which enables weak signal from MCU to control high-voltage and high-current load equipment.
The built-in optocoupler provides electrical isolation between the control signal side and load side. It can prevent interference from load circuits from damaging the main control chip, greatly improving system stability and anti-interference capability. Each relay channel is equipped with a dedicated LED indicator light; the light turns on when the relay is pulled in, allowing users to quickly check working status.
Working voltage is DC 5V, perfectly compatible with AVR, 51, PIC, Arduino and other mainstream microcontrollers. Every relay supports normally open and normally closed contacts, bringing flexible switching options for different control demands. Standard pin headers are pre-soldered for convenient wiring and prototype testing.
It can be widely used in smart home control, small automatic equipment, motor control, lighting switch, industrial signal switching and various electronic automation DIY projects.
Reminder: Please strictly follow the rated parameters of the relay when connecting loads to avoid burnout caused by overcurrent or overvoltage.
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