USB Relay Module 5V 2 Channel PC Control

Specifications:

• Operating Voltage: 5V DC (powered directly via USB)
• Max Switching Voltage (AC): 250V @ 10A
• Max Switching Voltage (DC): 30V @ 10A
• Trigger Current: 20mA per channel
• Number of Channels: 2 (independently controlled)
• Interface Type: USB (Standard HID Device)
• Relay Status Indicators: Red (Disconnected), Green (Closed)
• Operating Temperature Range: -40°C to +85°C

Applications :

• Home automation
• Robotics Control
• Control doors and windows via the windows system
• Controller power supply etc.

Features :

• Onboard USB interface, stable connection.
• 2 Channel Relay - each module can control 2 loads independently
• Use an imported high-performance USB control chip.
• Application code: Green indicates that the relay is closed, and the red disconnect
• Use genuine pine relay
• Support major operating systems

Unlock New Capabilities

• Past Projects If you've already experimented with basic microcontroller relay setups or simply turning LEDs on and off via serial monitor commands, you understand the fundamentals of digital switching. Now, you are ready to eliminate the microcontroller middleman entirely and take control straight from your operating system.
• Feature Upgrade This 2-Channel USB Relay unlocks direct PC-based automation without needing an Arduino or ESP32. It allows you to control desk lamps, room fans, testing rigs, or industrial actuators directly from a Python script, C++ program, or a ready-made Windows GUI. It is the perfect bridge for building PC-centric home automation hubs, automated test equipment (ATE), or interactive kiosk exhibits.
• Effort Level & Minimum Hardware
• Effort Level: Beginner

Package Includes :

• 1 x 5V 2 channel USB Control Relay Module.

Frequently Asked Questions

• Is this USB relay module compatible with Windows 10 and 11?
  Yes, it acts as a standard USB HID device and is natively recognized by modern Windows operating systems without needing custom drivers.
• Can I use this module on a Raspberry Pi running Linux?
  Yes, the module is supported on Linux systems and can be controlled using Python scripts or C/C++ programs.
• Does this work with Mac OS?
  Yes, Mac OS natively supports HID devices, allowing you to control the relay using standard HID programming libraries.
• Can I connect multiple USB relay modules to the same computer?
  Yes, but your control script must be able to differentiate between them, typically by reading their specific USB device paths or serial numbers if supported.
• Does this module need an external 5V power supply?
  No, the module is powered entirely through the USB port from your computer, which provides the necessary 5V for the relays and control chip.
• What is the maximum AC voltage the relays can switch?
  The onboard relays are rated to switch up to 250V AC at a maximum current of 10A per channel.
• How much current does the board draw from the USB port?
  The board draws approximately 20mA per channel when triggered, which is well within the 500mA limit of a standard USB 2.0 port.
• How do I connect my appliance to the relay?
  You must cut the live wire of your appliance and connect one end to the Common (COM) terminal and the other to the Normally Open (NO) terminal.
• What does the Normally Closed (NC) terminal do?
  The NC terminal remains connected to the COM terminal when the relay is off; it breaks the circuit only when you send a command to turn the relay on.
• Do I need special cables to connect this to my PC?
  You only need a standard USB Type-A to Type-B cable (commonly known as a printer cable) to connect the board to your computer.
• Do I need to install drivers to use this module?
  No, because it uses the USB HID (Human Interface Device) protocol, the drivers are already built into Windows, Mac, and Linux.
• What programming languages can I use to control the relays?
  You can use any language that supports HID communication, with Python, C++, and C# being the most popular choices.
• Is there a way to control the relay without writing code?
  Yes, standard Windows GUI executable programs are available online that allow you to turn the relays on and off with simple mouse clicks.
• Why doesn't the relay click when I send a command?
  Ensure the USB cable is fully seated and securely connected; a loose connection will provide power (LEDs on) but drop the data signal.
• Why is my computer not recognizing the USB device?
  Check that you are using a USB data cable and not a "power-only" charging cable, which lacks the internal data wires required for HID communication.