Top view of ShillehTek MB102 breadboard power supply with USB port and jumper pins

MB102 Breadboard Power Supply Module 3.3V/5V for Arduino

SKU LC-ICRP-81MP

$6.99 USD Shipping & tax calculated at checkout
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Breadboard power module that provides selectable 3.3V and 5V rails for clean Arduino and sensor prototyping.

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Overview

Product Overview

The MB102 breadboard power supply plugs straight onto the power rails of a standard 830- or 400-point breadboard and gives you clean 5 V and 3.3 V, selectable per rail with jumpers. It takes 6.5–12 V on a 5.5 × 2.1 mm barrel jack or 5 V over USB-A, and its two AMS1117 linear regulators supply up to 700 mA per rail — plenty for sensors, OLEDs and an Arduino or ESP32 on the bench. A master slide switch with a power LED and a 4-pin 5 V / GND / 3.3 V header round it out.

Use it to stop running jumpers from a USB cable or bench supply every time you prototype, and to give 3.3 V sensors their own rail next to a 5 V Arduino. Module size is about 52 × 35 mm.

Questions & answers

Frequently asked questions

Yes. It is intended for Arduino-compatible breadboard projects, sensors, small microcontrollers, and quick prototypes that use a standard MB102-style solderless breadboard power layout.
Plug the module into the breadboard power header, then select the desired rail voltage using the onboard jumpers or switches, depending on the version. It is designed for quick setup without running loose power jumper wires from another supply.
The module provides selectable 3.3V and 5V breadboard rails. Each rail can be set with simple jumpers or switches, depending on the version, so confirm the selected voltage before connecting sensors or microcontrollers.
It is best for powering sensors, small microcontrollers, and test circuits while building or debugging on a solderless breadboard. It keeps the breadboard rails organized compared with using loose USB or bench-supply jumper wires.
Check that the module is fully seated on the breadboard power header, the rail selectors are set correctly, and the input power source is connected. Also verify that your circuit’s positive and ground connections match the breadboard rail layout.

Have other questions?

Chat with our US-based team — we usually reply fast.

What's included

Features & Specs

Dual AMS1117 regulators Separate AMS1117-5.0 and AMS1117-3.3 linear regulators give independent 5 V and 3.3 V rails.

Selectable per rail Set each breadboard power rail to 5 V, 3.3 V or off with its jumper.

Two power inputs 6.5–12 V DC on a 5.5 × 2.1 mm center-positive barrel jack, or 5 V over USB-A.

Up to 700 mA per rail Enough for sensors, OLED displays and a small microcontroller board on the bench.

4-pin Berg header 5 V, GND and 3.3 V pins for feeding power off the breadboard to other boards.

Master switch and LED Slide switch for power with a green indicator LED.

Fits standard breadboards, ~52 × 35 mm Plugs onto the power rails of 830-point and 400-point breadboards.

Reference

Documents

Full Product Manual MB102 Breadboard Power Supply 3.3V/5V In-depth setup guide with wiring, code examples, and troubleshooting.

Datasheet - MB102 Breadboard Power Supply Module 3.3V/5V

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