1 Channel 3V Relay Board Module

Wiring Connections:

• Input Side (Control Side):
  • VCC: Connect to a 3V DC power source.
  • GND: Connect to ground.
  • IN: Control signal input from a microcontroller (3V DC trigger).
• Output Side (Load Side):
  • NO (Normally Open): Connect this terminal to the device you want to control; it remains open until the relay is activated.
  • NC (Normally Closed): Connect this if you want the device to be powered until the relay is activated.
  • COM (Common): Common terminal for both NO and NC connections.

Power:

• Operating Voltage: 3V DC
• Current Consumption: 70-100mA when active

Input and Output:

• Input:
  • 3V DC control signal from a microcontroller like Arduino, ESP32, or Raspberry Pi.
• Output:
  • Switching capability for up to 250V AC or 30V DC loads, with a maximum current of 10A.

Physical Characteristics:

• PCB Material: FR4 fiber glass
• Relay: Sealed plastic casing for durability and protection against dust or moisture.
• Dimensions: 50mm x 25mm x 18mm (may vary slightly depending on manufacturer).
• LED Indicator: Shows the status of the relay (on/off).
• Mounting Holes: Holes provided for easy mounting on project cases or control panels.

Technical Specifications:

• Operating Voltage: 3V DC
• Relay Type: SPDT
• Max Load: 250V AC or 30V DC, 10A
• Trigger Voltage: 3V DC
• Opto-Isolation: Yes
• Switching Time: Fast switching between the ON and OFF states,  within milliseconds.

Additional Features:

• LED Indicator: A built-in LED provides a visual indication of the relay’s state, making it easy to troubleshoot or monitor in real-time.
• Compact Design: Small form factor makes it suitable for embedded projects with limited space.
• Durable Relay: The relay is rated for thousands of cycles, ensuring longevity even in applications that require frequent switching.
• Wide Application Use: Capable of controlling lights, motors, pumps, fans, and other high-power devices.

How to Use:

1. Powering the Module:
   • Connect the VCC pin to a 3V power supply and the GND pin to ground. This will power the module and ready the relay for use.
2. Control Signal:
   • Connect the IN pin to a digital output pin from your microcontroller (e.g., Arduino, Raspberry Pi). When this pin goes HIGH, it will activate the relay.
3. Connecting Load:
   • For a device that should be powered only when the relay is active, connect it to the NO (Normally Open) terminal and COM terminal.
   • For a device that should be powered when the relay is inactive, connect it to the NC (Normally Closed) terminal and COM terminal.
4. Triggering the Relay:
   • When the control signal goes HIGH (3V), the relay will switch from the Normally Closed state to the Normally Open state, completing the circuit for the device connected to the NO terminal.
   • The relay will return to its default state (NC) when the control signal is LOW.
5. Monitoring Relay Status:
   • The onboard LED will light up whenever the relay is triggered, indicating that the load is being powered.

Applications:

• Home Automation: Control lights, fans, or appliances using low-voltage signals from microcontrollers.
• DIY Projects: Ideal for projects where you need to switch high-power loads using low-power control signals.
• Smart Devices: Integrate with smart home systems for automated device control.
• Robotics: Use to control motors or other high-power components in robotics projects.
• Security Systems: Can be used to switch alarms or other security devices on or off.

The 1 Channel 3V Relay Board Module is a versatile and reliable module for controlling high-power devices using low-voltage control signals. Its 3V operating voltage makes it perfect for use with low-power microcontrollers like Arduino or Raspberry Pi. With its opto-isolated design, high-current switching capacity, and easy-to-use interface, this relay board is an essential component for home automation, robotics, and DIY electronics projects. Whether you are controlling lights, motors, or other devices, this relay board ensures safe and efficient switching of high-voltage loads.