2 Channel 5V Relay Module For Arduino

 2-Channel 5V Relay Module for Arduino:

1. Functionality:

   • The 2-channel relay module is designed to control high-voltage devices such as pumps, fans, or actuators.
   • It simplifies the setup by integrating two relays on a single board, making it more convenient to control both devices.

2. Comparison to Two Separate 1-Channel Relay Modules:

   • Wiring: The 2-channel relay module has simpler wiring compared to using two separate 1-channel relay modules.
   • Space: It takes up less space since both relays are on a single board.
   • Cost: Using a 2-channel relay module is more cost-effective.
   • Programming: The programming required is the same for both options.

3. Pinout:

   • Power Pins:
     • DC+: Connect this pin to the 5V power supply.
     • DC-: Connect this pin to the ground (GND) of the power supply and also to the GND pin of the Arduino.
   • Signal Pins:
     • IN1: Receives the control signal from Arduino to control relay 1.
     • IN2: Receives the control signal from Arduino to control relay 2.
   • Output Pins:
     • NCx (Normally Closed): Connects to a high-voltage device controlled by relay 1.
     • NOx (Normally Open): Connects to a high-voltage device controlled by relay 2.
     • COMx (Common): Common connection for both relays.

4. Trigger Options:

   • The module has two jumpers to select between low-level trigger and high-level trigger for each relay individually.
   • You can choose the appropriate trigger type based on your application.

5. Power Considerations:

   • If you intend to power other components using the 5V pins, ensure that the relay module receives sufficient power.
   • Use an external 5V power source specifically for the module.
   • Additionally, you may need higher-voltage power adapters (e.g., 12VDC, 24VDC) for the devices controlled by the relay module.