1 Channel Relay 3V Relay Module for Micro:bit

A compact 3V relay module designed for micro:bit projects, allowing you to control high-current devices like home appliances, motors, and lights. Part of the OCTOPUS series with standard connector compatibility.

The module features a high-quality HUIKE relay capable of switching up to 30A, with both normally open and normally closed contacts for flexible circuit control. The 3V operating voltage is perfectly suited for micro:bit's power output.

Key Features

• High Current Capacity – Handles loads up to 30A for controlling powerful devices
• 3V Operation – Designed specifically for micro:bit power levels
• Dual Contact Types – Includes both normally open (NO) and normally closed (NC) contacts
• Easy Connection – Standard 3-pin connector works with octopus:bit and similar breakouts
• Compact Design – OCTOPUS series form factor with standard mounting holes

Ideal For

• Home automation projects
• Controlling lights and motors
• micro:bit IoT applications
• Educational electronics projects

Getting Started

Connect the relay module to P1 on your octopus:bit using a jumper cable, then insert your micro:bit into the edge connector.

In MakeCode, set P1 to high to close the normally open contact (and open the normally closed contact). View example program.

Specifications

• Operating Voltage: 3V DC
• Maximum Switching Current: 30A
• Contact Configuration: 1× NO, 1× NC
• Relay Type: HUIKE miniature relay
• Connector: 3-pin OCTOPUS standard

Dimensions