4 Channel Relay Module for micro:bit

Control high-power devices with ease using the Whadda WPM401 4-Channel Relay Module, designed to connect directly to a micro:bit. This module simplifies project builds by letting you manage up to four separate devices or appliances individually, without the need for additional components or complex wiring.

Each relay channel features a built-in status LED, providing immediate visual feedback on the operating state of connected devices. The module integrates an onboard 3.3V regulator, ensuring stable performance when powered from a 5V DC supply. With a control input voltage range of 3.3–5V DC, it is fully compatible with the micro:bit’s logic levels, and each channel has a maximum control input current of 5mA.

The relay outputs are rated at 24V DC and 3A (non-inductive), making them suitable for controlling a wide range of high-power loads such as motors, lights, solenoids, and other appliances. Whether you are building a home automation project, a robotics prototype, or an educational experiment, this relay module offers a straightforward and reliable solution.

Key Features:

• Direct connection to micro:bit – no extra equipment needed
• Four independent relay channels for multi-device control
• Status LEDs for each channel
• Onboard 3.3V regulator for stable operation
• Compact design: 43mm (height) × 33mm (width) × 15mm (depth)

Specifications:

• Operating Voltage: 5V DC
• Control Input Voltage: 3.3–5V DC
• Control Input Current (P3, P4, P6, P7): 5mA max
• Relay Output: 24V DC, 3A (non-inductive)
• Dimensions: 43mm × 33mm × 15mm
• Weight: 78g

This module is ideal for makers, educators, and hobbyists looking to expand the capabilities of their micro:bit projects with reliable, high-current switching.