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Product Description (Detailed):

Safely bridge the gap between low-voltage microcontrollers and high-voltage or high-current loads with our 5V Relay SPDT Sugar Cube Relay Board, featuring robust Opto-Isolation for superior circuit protection. This single-channel relay module is an essential component for any project requiring the control of AC or DC devices using digital signals from platforms like Arduino, Raspberry Pi, or other embedded systems, all while ensuring complete electrical isolation.

At the heart of this board is a compact "sugar cube" style Single Pole Double Throw (SPDT) relay, offering both Normally Open (NO) and Normally Closed (NC) contacts. This versatile configuration allows you to switch a wide range of loads, from lights and motors to solenoids and appliances, providing flexibility for various automation and control applications. The crucial feature, however, is the integrated opto-isolation. An optocoupler (or opto-isolator) uses light to transmit signals between the low-voltage control side (your microcontroller) and the high-voltage load side. This ingenious design electrically separates the two circuits, effectively preventing ground loops, noise interference, and, most importantly, protecting your sensitive microcontroller from high voltage spikes or back EMF generated by the load. This enhances both the reliability and safety of your entire system. The module typically includes an onboard LED indicator for visual confirmation of the relay's status and screw terminals for easy and secure wiring of your loads. Powered by a standard 5V DC supply, this opto-isolated relay board is the ideal solution for robust, safe, and reliable switching in home automation, robotics, industrial control, and IoT projects, ensuring your control electronics remain safe from the power circuits they command.

The Single Channel Relay Module (5V) is a compact, opto-isolated board that allows low-voltage digital circuits (like Arduino, ESP32, or Raspberry Pi) to safely control high-voltage appliances like fans, lights, motors, and pumps.

The module contains an electromechanical relay, a driver transistor, an opto-isolator, and indicator LEDs. It's widely used in home automation, industrial control, IoT systems, and robotics to provide electrical isolation and safe switching.

With onboard screw terminals and standard 3-pin headers, it's easy to integrate into breadboards, PCBs, or jumper wire setups.

Key Features:

• Input Voltage: 5V DC

• Trigger Current: ~15–20mA

• Control Signal: TTL logic compatible (Arduino/RPi/ESP32)

• Opto-isolated input for safe switching

• Drives AC loads up to 250V/10A or DC loads up to 30V/10A

• Built-in status LED indicator

• Screw terminals for easy AC/DC load connection

• Ideal for smart home automation, IoT switching, and Arduino relay control

Technical Specifications:

How to Use:

1. Connect VCC and GND to Arduino 5V and GND.

2. Connect the IN pin to any Arduino digital pin (e.g., D7).

3. Use digitalWrite(D7, HIGH) to activate the relay (switch ON the load).

4. Use the screw terminal to connect AC or DC loads safely.

5. Always ensure electrical isolation when working with high voltages.

Note: High-voltage side must be handled with caution and ideally kept isolated from low-voltage components.

Applications:

• Home Automation (smart lights, fans, etc.)

• Arduino & Raspberry Pi relay projects

• IoT-based switch controllers

• Industrial automation projects

• Motor and pump control systems

• AC appliance control via microcontroller

Package Includes:

• 1 × Single Channel 5V Relay Module