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A 2-channel relay module is an electronic component used to control high voltage devices with a low voltage control signal. It contains two relays that can be independently activated by a microcontroller or other control circuits. Relay modules are commonly used in automation, control systems, and switching applications. Key Features:
Number of Channels: 2
Relay Type: Typically Single-Pole Double-Throw (SPDT) or Single-Pole Single-Throw (SPST)
Control Signal: Low voltage control signals (e.g., from microcontrollers or digital circuits)
Isolation: Provides electrical isolation between the control circuit and the high voltage circuit
Status Indication: Often includes LEDs to indicate relay status
Technical Specifications:
Control Voltage: 5V DC (commonly used with microcontrollers like Arduino)
Relay Contact Rating: Typically 10A at 250V AC or 10A at 30V DC
Operating Voltage Range: 5V DC ±10%
Switching Capacity: Varies by relay type, generally up to 10A
Isolation Voltage: Varies, typically up to 2500V AC
Operating Temperature Range: -40°C to +85°C (depending on module specifications)
Relay Actuation: Mechanical relay operation, typically controlled by a low voltage signal (e.g., 5V)
Applications:
Home Automation: Control lights, appliances, and other household devices
Industrial Control: Switch machinery, equipment, and other industrial devices
Automated Systems: Use in robotics, automotive systems, and other automated applications
Microcontroller Projects: Interface with microcontrollers (e.g., Arduino, Raspberry Pi) for switching tasks