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5V Four-Channel Relay Module - Pin Diagram, Specifications
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![4 Channel 5V Relay Module - Wiki](https://i2.wp.com/wiki.sunfounder.cc/images/0/06/4_channel_relay_schematic.png)
![5V Dual Channel Relay Module Pinout, Working, Interfacing with Arduino](https://i2.wp.com/microcontrollerslab.com/wp-content/uploads/2021/01/5V-Dual-Channel-Relay-Module-internal-circuit-diagram.jpg)
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![5V Four-Channel Relay Module - Pin Diagram, Specifications](https://i2.wp.com/components101.com/sites/default/files/inline-images/Four-Channel-Relay-Module-Application-Circuit.png)
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![5V Four-Channel Relay Module - Pin Diagram, Specifications](https://i2.wp.com/components101.com/sites/default/files/inline-images/Four-Channel-Relay-Module-Circuit-Diagram.png)
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![5V Four-Channel Relay Module - Pin Diagram, Specifications](https://i2.wp.com/components101.com/sites/default/files/component_pin/Four-Channel-Relay-Module-Pinout.jpg)
![4 Channel 5V Relay Module - Wiki](https://i2.wp.com/wiki.sunfounder.cc/images/9/95/4_channel_relay_PCB.png)