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A dual-output breadboard power supply module that provides selectable 3.3 V and 5 V rails. Designed for use with the BBC micro:bit, Arduino, Raspberry Pi, an...

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A dual-output breadboard power supply module that provides selectable 3.3 V and 5 V rails. Designed for use with the BBC micro:bit, Arduino, Raspberry Pi, and standard MB102 breadboards, it solves the common problem of the micro:bit lacking a 5 V output pin — essential when driving servos, ultrasonic sensors, and other 5 V modules.

Key Features

  • Dual Output – Two independent power rails, each selectable between 3.3 V and 5 V via jumper caps
  • Three Input OptionsDC barrel jack (2.1 × 5.5 mm, 6.5–12 V), USB Type-A, or Micro USB
  • Breadboard Compatible – Plugs directly into MB102 and standard breadboards
  • Versatile Power Sources – Works with wall adapters, computer USB ports, or mobile phone chargers

Ideal For

  • Providing 5 V power to sensors and servos alongside a micro:bit
  • Breadboard prototyping with Arduino, Raspberry Pi, or micro:bit
  • Projects requiring both 3.3 V and 5 V power rails simultaneously

Package Contents

  • 1× 3.3V/5V Power Supply Module

Jargon buster

Plain-language definitions for the technical terms used above.

DC barrel jack
A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
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