1 Channel Relay 3V Relay Module for Micro:bit
1 Channel Relay 3V Relay Module for Micro:bit is backordered and will ship as soon as it is back in stock.
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Call us on 1300 240 817 between 10 AM and 4 PM on weekdays or email team@littlebird.com.au .
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For orders over 500g (such as bulky items), shipping may cost more than the initial estimate.
We deliver across Australia, and here are the options (based on your location; view them on the cart page):
- Standard Post: Starting at $7 (6+ business days, with tracking)
- Express Post: Starting at $11 (2+ business days, with tracking)
- Same Day Delivery: Available for Sydney orders.
- Non-metro WA, NT, SA, and TAS: May take an additional 2+ days.
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

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