MB102 Breadboard Power Supply module – How to use it

MB102 Breadboard Power Supply module is one of the essential and low-cost components in the electronics labs. It powers the circuits and is also used for testing purposes. The small compact module is power efficient and can be operated using an input voltage range of 6.5 Volts to 12 Volts. The module has two voltage regulators which output 3.3 Volts and 5 Volts. Mb-102 also has an onboard capacitor for noise suppression and smoothing the input voltage.

MB102 Breadboard Power Supply Module

The module is facilitated with a switch to manually turn on/off the module while connected to the power source. It comes with an additional USB connector and berg headers which can also be configured accordingly. The component is useful especially for prototypes and small breadboard circuits.

The post is a quick guide to the pinout, features and specifications, interfacing applications.

Breadboard Power Supply module

MB102 Breadboard Power Supply Module components

The breadboard power supply module consists of:

Power Port & USB Port: The DC power port and USB-A connector are provided to the module to power it up.

Power Switch & LED: A switch is embedded to provide extra control along with an LED to indicate the energizing of the module.

Jumpers: The mb102 breadboard supply module is capable of giving out 3.3 volts or 5 volts to breadboard rails. They can be operated individually.

Berg Headers: The berg headers can be used to output power to other devices as well.

BBPS module Pinout

The following figure shows the pinout diagam of MB102 Breadboard Power Supply module.

MB102 Breadboard Power Supply Module pinout

Pin Configuration

The pin configuration of the BBPS module in tabular is described as follows:

Pin NameFunction
Left rail jumper (voltage selection)5 VoltsOFF (ground)3.3 Volts
Right rail jumper(voltage selection)5 VoltsOFF (ground)3.3 Volts
Output Headers2 output bergs of 3.3 Volts2 output bergs of 5 Volts4 output bergs of GND
DC Input jack6.5 Volts – 12 Volts Input port
USB Input jackInput port

Features and Specifications

  • Operating Input voltage: 6.5 Volts – 12 Volts
  • Output voltage: 3.3 Volts or 5 Volts
  • Maximum Output Current: < 700 mA
  • Module Dimensions: 5.3cm x 3.5cm
  • The module has an on/off switch to control the external input switch.
  • Along with the DC port, the Breadboard module has a USB port.
  • The USB port provides input to the module to output power to the circuits.
  • The module has selectable power rails that can be controlled independently.
  • The module can switch between output voltages i.e 3.3V and 5V.
  • Plug the BBPS module directly into the breadboard.
  • For easiness, the BBPS module also has two pairs of onboard 3.3V and 5V DC output berg headers.

Schemati Diagram

The schematic is provided for the visual and describes the circuitry of the breadboard based power supply module. This schematic diagram becomes handy when any of the components got damaged and we want to replace that component.

MB102 Breadboard Power Supply Module schematic diagram

How to use BM102 Power Supply Module?

This helpful BBPS module comes in handy in a vast number of projects. It can be interfaced very easily.

To power the Breadboard

To power the breadboard through the BBPS module, mount it on to the breadboard. It should be placed in such a way that the left and right jumpers of the module coincide with the power rails of the breadboard. Connect the input power supply either regulated or unregulated to the DC input jack. Turn on the switch to check the LED. If the module is energized, the LED lights up. Adjust the jumper to the desired output voltage. If you want the bread power rails of 5 volts, adjust the jumper accordingly. The left and right jumpers are two independent channels and can provide different voltages simultaneously.

Breadboard Power Supply module interfacing with breadboard

To power peripherals

Connect similarly as previously explained. Now use female jumpers to connect the berg headers to power up other components and microcontroller units. It is also selectable between 3.3Volts and 5 Volts.

Alternate Options

  • XD-42 Dual Channel Breadboard Power Supply


  • Breadboard circuits
  • DIY Projects

2D Diagram

2D diagram

Related Components:

3 thoughts on “MB102 Breadboard Power Supply module – How to use it”

  1. This is a great breadboard power supply… the pic of the schematic is a bit fuzzy. Would it be possible to obtain a higher resolution pic/drawing of the schematic?


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