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Item #:
120942938
Single-Channel Relay Module for Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino 3.3V/5V Relay Expansion Board with Optocoupler Isolation & LED
90% of respondents would recommend this to a friend
Item #:
120942938
TZS 48742
Price Details
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Order now and get it around Saturday, September 26
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This single-channel relay board is the ideal solution for those looking to build automated control systems or expand the functionality of their Pi and other development platforms.
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What Stands Out
Versatile Compatibility
Supports multiple platforms including Raspberry Pi, STM32, ESP32, and Arduino, ensuring seamless integration for various projects and applications, catering to a wide range of hobbyists and developers.
Optocoupler Isolation
Features optocoupler isolation for enhanced safety and noise reduction, protecting sensitive components while allowing reliable switching of higher voltage loads without risking your microcontroller.
User-Friendly Design
Equipped with an LED indicator for easy status monitoring, simplifying troubleshooting and enhancing user experience, making it ideal for beginners and experienced developers alike.
Product Details
| Connector Type | Dupont |
| Current Rating | 10 Amps |
| Mounting Type | Surface Mount |
| Operation Mode | Automatic |
| Coil Voltage | 5 Volts |
| Contact Current Rating | 10 Amps |
| Minimum Switching Voltage | 5 Volts |
| Number of Terminals | 3 |
| Brand Name | xicoolee |
| Unit Count | 1.0 Count |
| Manufacturer | Xicoolee |
| Brand | xicoolee |
| Item Weight | 0.1 lbs (50 grams) |
Who Should Buy?
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Hobbyist Developers
Ideal for DIY projects using Raspberry Pi or Arduino to control home appliances and devices easily.
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Educational Purposes
Great for teaching basic electronics and programming concepts to students using interactive projects.
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Prototyping Systems
Perfect for engineers prototyping IoT systems that require remote relay control for devices and applications.
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High-Power Applications
Not suitable for controlling high voltage or high current devices beyond its rated capacity.
Product Description
Single-Channel Relay Module for Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino 3.3V/5V Relay Expansion Board with Optocoupler Isolation & LED Indicator Fits Raspberry Pi One Channel Relay
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is a single-channel relay module and how does it work?
Answer: A single-channel relay module is an electronic switch that allows you to control a high voltage circuit using a low voltage signal. When a signal is applied to the relay's input, it activates a coil inside the relay, which closes or opens the circuit connected to it. This module typically works with microcontrollers like Raspberry Pi, STM32, or Arduino, allowing you to automate devices like lights and motors. -
Question:
Can I use this relay module with Raspberry Pi 4?
Answer: Yes, the single-channel relay module is compatible with Raspberry Pi 4, as well as previous versions like the Raspberry Pi Zero, 2B, and 3B. It operates at both 3.3V and 5V, making it versatile for various projects. This ability means you can effectively create smart home applications or control industrial machinery through your Raspberry Pi. -
Question:
What is optocoupler isolation and why is it important?
Answer: Optocoupler isolation separates the control circuit from the high voltage side, protecting sensitive components from voltage spikes or surges. This feature is crucial when working with high power devices, as it enhances the reliability of your project. It ensures that any issue on the high voltage side does not affect your microcontroller, making it safer and more durable. -
Question:
How can I integrate this relay module with an Arduino?
Answer: Integrating the relay module with an Arduino involves connecting the relay's input pin to one of the Arduino's digital pins. You'll also need to connect power and ground. A simple code to turn the relay on and off can be uploaded to the Arduino, enabling you to control appliances like lights or fans from your Arduino project. This integration opens up numerous automation possibilities. -
Question:
What are some practical applications for this relay module?
Answer: This relay module can be used in various applications such as home automation, where you control lights and appliances remotely through a Raspberry Pi or Arduino. It can also be used in robotics for controlling motors, in security systems for activating alarms, or in industrial setups to control larger machinery from a microcontroller interface. -
Question:
Is this module suitable for both 3.3V and 5V systems?
Answer: Yes, the single-channel relay module is designed to be compatible with both 3.3V and 5V systems. This versatility means you can use it with various microcontrollers without worrying about voltage mismatches. Users can seamlessly switch between platforms like ESP32 for IoT applications or a 5V Arduino setup. -
Question:
Can I control multiple devices with one relay module?
Answer: A single-channel relay module is designed to control one device at a time. However, if you want to control multiple devices, you can use multiple relay modules connected to the same microcontroller. This setup is common in home automation systems where multiple appliances need to be controlled simultaneously. -
Question:
What kind of power supply do I need for this relay module?
Answer: The relay module typically requires a power supply of either 3.3V or 5V, depending on the microcontroller used. Ensure your power supply can handle the current demands of the relay and any connected devices. For optimal performance, it's recommended to use a stable source, which enhances the reliability of your automated applications. -
Question:
What types of devices can I control with this relay module?
Answer: You can control a wide variety of devices with this relay module, such as lamps, fans, motors, and other home appliances. It is particularly useful for projects where remote operation or automation is needed. Whether you're creating a smart home project or an automated garden system, the relay can manage various loads, enhancing your project's capabilities. -
Question:
Where can I buy the Single-Channel Relay Module for Raspberry Pi and Arduino?
Answer: You can buy the Single-Channel Relay Module for Raspberry Pi and Arduino from Ubuy. They offer a wide selection and provide a reliable purchasing experience. You can find detailed product information and customer reviews to help you make an informed decision before purchasing.
xicoolee Single Board Computers Editorial Review
Single-Channel Relay Module for Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino 3.3V/5V Relay Expansion Board with Optocoupler Isolation & LED Indicator Fits Raspberry Pi One Channel Relay provides a robust solution for controlling high voltage devices. With a 10 A current rating and a 5 volts coil voltage, it operates efficiently in automatic mode and features a normally open contact type. Users appreciate the built-in optocoupler isolation, enhancing safety for sensitive components. Its compact and lightweight design makes it ideal for diverse applications, including IoT projects. The LED indicator is a practical addition for monitoring relay status visually.
Customer Reviews & Ratings
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Pros
- Optocoupler isolation for enhanced safety
- Suitable for a range of microcontrollers
- Supports both 3.3V and 5V systems
- Compact design fits easily into projects
- LED indicator for easy status checking
Cons
- Requires basic electronics knowledge for setup
Platform Trust & Buyer Confidence
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9 September 2026 · via Trustpilot
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11 September 2026 · via Trustpilot
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8 September 2026 · via Trustpilot
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TZS 48742
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Features & Benefits
- Versatile compatibility with Raspberry Pi, STM32, ESP32, and Arduino.
- Handles high loads up to 10A at 250VAC/28VDC for reliable device control.
- Optocoupler isolation ensures stable operation in noisy environments.
- Real-time relay status monitoring with an LED operation indicator.
- Open-source example programs available for easy integration.
- Perfect for both hobbyists and experienced engineers working on IoT projects.
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