Relay 4 Channel

4-Channel Relay Module is Control High-Voltage Devices with Arduino or Microcontrollers. 

 Key Features:

• Channels: 4 (can control 4 devices)
• Relay Type: Electromechanical, SPDT (Single Pole Double Throw)
• Control Voltage: 5V (logic-level input)
• Load Voltage: Up to 250V AC or 30V DC
• Current Rating: Typically 10A
• Optocoupler Isolation (on most models) for safety

What It Can Control:

• Lights
• Fans
• Motors
• Pumps
• Any AC or DC device

 How It Works:

• Each channel is triggered by a digital pin (HIGH or LOW).
• When triggered, the relay acts like a switch to turn an external device on/off.