Relay Module 4 channels 5V

⚡ Relay Module – 4 Channel, 5V

Multi-Device High-Power Control for Arduino, Raspberry Pi & Other Microcontrollers

The 4-Channel 5V Relay Module lets you control up to four independent high-voltage AC or high-current DC devices using a low-voltage microcontroller signal. It’s ideal for home automation, robotics, and industrial control applications.

⚙️ Technical Specifications

✅ Features

• 🔹 Control up to 4 devices simultaneously

• 🔹 Safe opto-isolated inputs for MCU protection

• 🔹 Works directly with Arduino, ESP, Raspberry Pi, PIC, STM32

• 🔹 Individual LED indicators for each channel

• 🔹 Screw terminals for secure load wiring

🧪 Example Arduino Connection

Sample Code:

cpp
CopyEdit
int relays[4] = {2, 3, 4, 5};

void setup() {
  for (int i = 0; i < 4; i++) {
    pinMode(relays[i], OUTPUT);
  }
}

void loop() {
  for (int i = 0; i < 4; i++) {
    digitalWrite(relays[i], HIGH); // Turn ON relay
    delay(500);
    digitalWrite(relays[i], LOW);  // Turn OFF relay
    delay(500);
  }
}

🧠 Applications

• 💡 Home automation – control multiple lights & appliances

• 🚰 Water pumps & motors

• 🔋 Battery banks switching

• 🔥 Heating control

• ⚙️ Industrial automation

• 🤖 Robotics & smart projects

​