شيلد ريلاي 4 قنوات للأردوينو

The 4-Channel Relay Shield is a powerful expansion board designed to allow microcontrollers (like the Arduino Uno or Mega) to control high-voltage and high-current devices safely. By using a small 5V signal from your Arduino, you can "switch" heavy loads such as household lamps, water pumps, or motors, making it a cornerstone for smart home and automation projects.

Key Features

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  Plug-and-Play Design: Uses the standard Arduino Shield footprint, allowing it to be plugged directly into an Arduino board without messy jumper wires.

  
  


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  Stackable Headers: Designed with stackable pins, so you can still plug other shields (like a Sensor Shield or LCD Shield) on top of it.

  
  


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  Logic Compatibility: Supports high-drive signals from both 3.3V (e.g., ESP32/DUE) and 5V (e.g., Uno/Mega) systems.

  
  


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  Visual Feedback: Includes four onboard Red LEDs that light up when a specific relay is activated, making debugging simple.

  
  


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  Easy Mounting: Features three M3 screw holes for secure installation inside project boxes.

  
  

Understanding the Relay Terminals

Each of the four relays has a 3-pin screw terminal block for the "Load" (the device you are controlling).

Technical Specifications

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  Operating Voltage: 5V DC (supplied via the Arduino board).

  
  


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  Channel Count: 4 independent relays.

  
  


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  Load Capacity: Typically supports up to 30V DC or 250V AC (Refer to the specific markings on the relay cubes).

  
  


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  Control Signal: Digital HIGH/LOW.

  
  


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  Indicator: 4x Red LEDs (Relay Status).

  
  

How it Works

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   Passive State: When the Arduino pin is LOW, the COM pin is connected to NC. No current flows to a device connected to NO.

   
   


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   Active State: When the Arduino pin is HIGH, the internal electromagnetic coil pulls the switch. COM disconnects from NC and connects to NO, completing the circuit for your high-power device.

   
   

Package Contents

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  1x 4-Channel Relay Shield Module