Arduino 4 Relay board 5V

Quick Answer: The Arduino 4 Relay Board 5V is a practical relay switching module for Arduino-based projects, letting students control multiple external devices or circuits through low-voltage control signals for automation, robotics, and STEM education.

Description

The Arduino 4 Relay Board 5V is a relay switching module built for Arduino projects, automation systems, embedded electronics learning, and STEM education. With a 4-relay configuration operating on 5V control-based project systems, it enables users to control multiple external devices or circuits through low-voltage control signals, making it especially useful for project-based learning, smart control models, robotics experiments, and real-time switching applications. It is designed for Arduino-based multi-channel switching applications, useful for switching external devices through low-voltage signals, and supports practical learning in relay interfacing and control logic. The board helps users understand hardware-software coordination in real projects and is suitable for school labs, college workshops, and technical training centers, offering a compact and practical board for repeated lab and classroom use.

Specifications

Compatibility & Safety Note

• Controlled via 5V logic-level signals from an Arduino or compatible board; confirm signal voltage matches the relay board’s rating before wiring.
• When switching external devices, use relays rated for the connected load’s voltage and current; do not exceed rated relay contact ratings.
• Keep high-voltage or mains-connected wiring on the relay’s switched side isolated from the low-voltage control side.
• Allow adequate ventilation around the board when switching devices that draw significant current.
• Supervise students when connecting relays to any external circuit, especially anything drawing mains-level power.
• Double-check wiring polarity and connections before powering on to avoid damaging the board or connected devices.

Why Choose LabEquip

LabEquip’s TLM Kits range gives automation and robotics labs a genuine multi-channel relay interface for Arduino-based control projects. This relay board pairs naturally with the Arduino Nano and Arduino Uno Wi-Fi V2 as control boards, and complements the Prototyping Shield for building out complete automation circuits in the classroom.

Frequently Asked Questions

How many relay channels does this board have?
It has a 4-relay configuration for controlling multiple outputs.

What control voltage does this board use?
It operates with 5V control-based project systems.

What is this board used for?
It is used for Arduino-based multi-channel switching applications in automation, robotics, and STEM learning.

What does this board help students learn?
It supports practical learning in relay interfacing and control logic and hardware-software coordination.

Who is this board suited for?
It suits school labs, college workshops, and technical training centers.

Is this board suitable for repeated classroom use?
Yes, it is a compact and practical board designed for repeated lab and classroom use.

Last Updated: September 2026