MB102 Breadboard Power Supply Module, 2-Channel 5V/3.3V Regulator Board, Mini USB + DC Barrel Jack Input, Dual Rail Output with Jumpers, On/Off Switch & Power LED, Arduino ESP32 Compatible

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Key specs

Fits

MB102 breadboards

Outputs

3.3V / 5V selectable per channel

Input

6.5-12V DC or USB

Channels

2 independent rails

Details

SKU: DIY-030
Category: Arduino and Raspberry Accessories & Modules
Min. order: 1 pcs
Barcode: DKU-000064

The MB102 Breadboard Power Supply Module is a convenient, plug-and-play power solution for solderless breadboard projects. It provides clean, regulated 5V and 3.3V outputs and is designed to fit directly onto standard MB102 / 830-point breadboards, eliminating messy jumper wires and making prototyping faster and safer.

Read the full description ↓

The MB102 Breadboard Power Supply Module is a convenient, plug-and-play power solution for solderless breadboard projects. It provides clean, regulated 5V and 3.3V outputs and is designed to fit directly onto standard MB102 / 830-point breadboards, eliminating messy jumper wires and making prototyping faster and safer.

This module features a two-channel rail design, meaning the left and right breadboard power rails can be set independently. You can run 5V on one rail and 3.3V on the other, or set both sides to the same voltage depending on your circuit needs—perfect for mixed-voltage setups using Arduino, ESP32, sensors, logic modules, displays, and communication boards.

Why you’ll love it

Quickly powers your entire breadboard with a tidy layout
Voltage selection is done using simple jumpers (no rewiring)
Multiple input methods let you use what you already have
Built-in switch and LED make power control and status easy

Inputs (Power In)

You can power the module in more than one way (depending on version/board):

Mini USB (5V input): Easy and common for quick setups
DC barrel jack: Flexible option using external adapters

Tip: If you use a higher DC input voltage, the regulator may heat up more—keep loads reasonable and ensure airflow.

Outputs (Power Out)

The MB102 provides two independent output rails (left and right). Each rail can be set by jumpers to:

5V
3.3V
(some versions also support OFF per side depending on jumper position/labeling)

This is extremely useful for powering:

5V sensors/modules on one side
3.3V modules (ESP32/ESP8266, I2C sensors, RF modules) on the other side

Pin/Module Layout (Typical)

Most MB102 boards include:

Voltage select jumpers for left and right rails
ON/OFF slide switch for quick power control
Power indicator LED
Breadboard header pins that plug directly into the breadboard rails
Mini USB port and DC barrel jack inputs

Exact placement/labels can vary slightly by manufacturing batch, but functionality is the same.

Specifications

Feature	Details
Model	MB102 Breadboard Power Supply Module
Output Channels	2 (Left + Right rails)
Output Voltage	5V / 3.3V selectable per rail
Input Options	Mini USB 5V, DC barrel jack
Recommended Use	Breadboard prototyping, mixed-voltage circuits
Compatibility	MB102/830-point and many standard breadboards
Indicators	Power LED
Control	On/Off switch

Current handling depends on your input voltage, regulator type, and cooling. For higher-current loads (motors/servos), use a dedicated power supply.

How to Use

Plug the MB102 module into the breadboard power rail connector area.
Choose your input (Mini USB or DC jack).
Set left and right rail voltages using the jumpers (3.3V/5V).
Switch ON and verify the power LED is lit.
Connect your modules to the breadboard rails and start prototyping.

Common Applications

Arduino breadboard projects
ESP32 / ESP8266 + sensors (3.3V rail)
Logic level experiments using both 3.3V and 5V
Powering OLEDs, I2C modules, small sensor boards
STEM education kits and electronics learning labs

MB102 Breadboard Power Supply Module, 2-Channel 5V/3.3V Regulator Board, Mini USB + DC Barrel Jack Input, Dual Rail Output with Jumpers, On/Off Switch & Power LED, Arduino ESP32 Compatible