Relay Modules

Our Relay Modules are designed to meet a wide range of needs and applications. We offer Relay Modules with working voltages of 5V, 12V, and 24V, ensuring compatibility with various systems. These modules not only work seamlessly with Raspberry Pi, but also with ESP32 and ESP8266, Compatible with Arduino Boards and other microcontrollers, providing you with the flexibility you need for your projects. Choose Kunkune for dependable, high-quality Relay Modules that enhance your electronic ventures.


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What is a relay module and how does it work?

Understanding the basics

It is an electrical device that acts as a switch to control power flow. It consists of a coil, which, when energised with a specific voltage, creates a magnetic field that controls the movement of a set of contacts. These contacts can open or close, allowing or interrupting the flow of current in the circuit.

How does it controls power flow?

When a digital signal is sent to the relay, it energises the coil, causing the contacts to change position. This change in position either connects or disconnects the power supply, controlling the flow of power in the circuit. They are commonly used to control various electrical devices, such as lights, fans, and motors.

Common applications

They find applications in a wide variety of fields, including home automation, industrial automation, automotive systems, and more. They are particularly useful in situations where low-power microcontrollers, such as Arduino or Raspberry Pi, need to control high-power devices.

Why choose a relay module from our shop?

Wide range of high-quality modules

Our shop offers a wide range with different features and specifications to suit your specific needs. Whether you require a single-channel or multi-channel module, we have you covered.

Comparing different relay module products

With our extensive range, you can compare products and choose the one that best suits your requirements. We provide detailed product descriptions and specifications, allowing you to make an informed decision.

Important features to consider when buying

When selecting a relay module, consider important features such as the voltage and current capacity, the number of channels, input and output signal compatibility, mounting options, and support for different microcontrollers. Our shop offers relays that cater to a wide range of applications and requirements, ensuring you find the perfect fit for your project.

How to select the right relay module for your needs?

Factors to consider when choosing

Selecting the right relay module involves considering various factors such as the voltage and current requirements of your application, the number of channels needed to control multiple devices, and the specific project demands.

Selecting the appropriate voltage and current capacity

It is crucial to select a relay with the appropriate voltage and current capacity to ensure safe and efficient operation. Choosing the wrong capacity can lead to damage and failure of your devices or even cause safety hazards. Our shop offers various voltage and current options to meet your exact requirements.

Controlling the power flow

Once the module is properly installed, you can control the power flow using a compatible microcontroller or digital signal source. With the appropriate programming, you can automate the operation of your electrical devices, making your system more efficient and convenient.

Where to buy relay modules in the UK?

Explore our wide range

If you looking to buy relay modules, look no further. Our shop offers a wide variety, suitable for different applications and projects. Explore our range to find the perfect match for your needs.

Relay Modules FAQ

1. What is it?

A relay module is an electronic device that operates as a switch to control electrical power. It uses an electromagnetic coil to open or close circuits, allowing power to flow to or isolate certain devices or components.

2. What is the purpose?

The main purpose of a relay module is to provide an interface between a low-voltage control signal (such as from a microcontroller) and a high-power electrical load. It helps safeguard the control circuitry from high voltage or current, allowing safe and efficient control of various devices.

3. How many channels does typically have?

A relay module usually comes with multiple channels, which can range from 1 to 8 or even more. Each channel corresponds to an individual switch or relay that can control a different electrical circuit.

4. What are the common voltage and current ratings?

Relay modules are available in different voltage and current ratings to suit various applications. The most common voltage is 5V, as it is compatible with popular microcontrollers like Arduino and Raspberry Pi. The current rating depends on the specific relay module design and can vary widely.

5. Can it be used with different types of control signals?

Yes, relay modules can work with various control signals. They accept both digital and analog signals. For example, they can be triggered by a microcontroller’s GPIO pins or other digital signal sources. They are also compatible with microcontrollers that provide a 5V signal.

6. What features should I consider when selecting a relay module?

When choosing a relay module, it is important to consider factors such as the voltage and current rating required for your specific application, the number of channels needed, the type of mounting options available, and any additional features or supported functions that may be useful in your project.

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