The Micro:bit Circular RGB LED Expansion Board by DFRobot is a versatile and compact add-on designed for interactive lighting and sound-based projects. It features 24 WS2812 RGB LEDs, an onboard microphone, and buzzer, enabling both visual and sound-responsive applications. Perfectly compatible with MakeCode graphical programming, it is ideal for beginners and educators working with the micro:bit platform.
This circular board supports both USB and PH2.0 battery power inputs, and its ultra-thin design makes it a great choice for wearables and portable projects.
Key Features
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24 WS2812 RGB LEDs with full-color mixing (16 million colors)
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Built-in Microphone and Buzzer for sound detection and feedback
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Supports MakeCode Graphical Programming for ease of use
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Dual Power Input: USB or PH2.0 interface (battery box or lithium battery compatible)
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Leads out P0 and P1 interfaces, compatible with Boson expansion modules
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Ideal for Wearables thanks to its compact, circular, and lightweight design
Specifications
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Supply Voltage: 3.5V to 5V
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LEDs: 24 × WS2812 single-line RGB LEDs
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Microphone: 1 × Onboard
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Buzzer: 1 × Onboard
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Interfaces:
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IO Expansion: P0, P1
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Power Input: PH2.0 Interface ×1, USB Power Port ×1
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Diameter: 80mm / 3.15 inch
Programming Support
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Fully supports MakeCode with examples including:
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Rotary rainbow LED animation
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Sound-controlled lighting effects
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Tomato timer (Pomodoro clock)
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Shipping List
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1 × Micro:bit Circular RGB LED Expansion Board
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2 × PH2.0 3-pin Sensor Cables
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5 × M3×4 Screws