XD-42 Dual Channel 3.3V 5V Breadboard Power Supply Module

XD-42 Dual Channel 3.3V 5V Breadboard Power Supply Module is an indispensable tool for hobbyists and professionals, providing a stable, regulated power source directly to your standard 400-point or 830-point breadboard rails. This module efficiently steps down a higher DC voltage input, most commonly from a standard AC-to-DC adapter or a USB port, into the two essential low voltages required by nearly all prototyping projects: 3.3 V and 5 V. The XD-42 features independently selectable voltage rails, consequently, you can easily power mixed-voltage circuits—a 5 V microcontroller alongside a 3.3 V sensor, for example—without needing multiple external power supplies. Furthermore, its direct breadboard mounting eliminates messy wiring, ensuring a clean and focused prototyping environment.

Key Features:

• Dual Independent Rails: Supplies 3.3 V and 5 V simultaneously, allowing independent voltage selection for each side of the breadboard power rails via jumper pins.
• Flexible Input Power: Accepts power from either a DC Barrel Jack (7V – 12V DC recommended) or a Micro USB port, offering versatility in your power setup.
• High Current Capacity: Delivers a reliable output current of up to 700 mA per channel (depending on input voltage and thermal dissipation), easily supporting multiple ICs and components.
• Onboard Power Switch: A dedicated power switch gives you instant control over the entire breadboard’s power, simplifying the circuit testing and debugging process.
• Power Indicator LED: An onboard LED visibly indicates when the module is supplying power to the breadboard, aiding in quick diagnostics.

Technical Specifications:

• Input Voltage (DC Jack): 7 V DC to 12 V DC (Maximum 15 V DC)
• Input Voltage (Micro USB): 5 V DC
• Output Voltage Options: 3.3 V DC, 5 V DC, or OFF (Selectable per rail)
• Maximum Output Current: ≈ 700 mA per power rail (Under typical operating conditions)
• Voltage Regulation: Utilizes the AMS1117 series linear regulator ICs for stable output.
• Output Voltage Accuracy: ±0.1 V (Under no-load conditions)
• Operating Temperature: 0°C to +70°C

Mechanical Specifications:

• Mounting Interface: Two rows of 5-pin headers designed to plug directly into the power rails of a standard breadboard.
• Indicator: One red Power Status LED.
• Connectors: One 5.5 mm x 2.1 mm DC Barrel Jack and one Micro USB port.
• Dimensions: Designed to fit perfectly across the center trench of the breadboard without blocking component holes.

Dimensions:

• Module Length: ≈ 53 mm
• Module Width: ≈ 35 mm
• Header Pin Pitch: 2.54 mm (Standard breadboard pitch)
• Weight: ≈ 15 g

Pinout and Wiring:

• Input Power: Plug a 7V–12V DC power adapter into the barrel jack or connect a Micro USB cable for 5V input.
• Breadboard Connection: Insert the two 5-pin headers into the red (+) and blue (−) power rails on your breadboard.
• Jumper Configuration: Use the two sets of 3-pin jumpers to select the output voltage (3.3V, 5V, or OFF) for the corresponding breadboard rail.
• Power Control: Utilize the onboard slide switch to quickly activate or deactivate power to your entire circuit.

Datasheet Reference:

• Download AMS1117-3.3V Regulator Datasheet

Commonly Used in:

• Educational Electronics Labs: Provides essential, safe low-voltage power for student projects.
• Rapid Prototyping: The primary power source for testing and developing circuits on solderless breadboards.
• Microcontroller Development: Powering popular boards like Arduino, ESP8266, and PIC microcontrollers directly on the breadboard.

Applications:

• Sensor Interfacing: Efficiently supplies 3.3 V for low-power sensors while the primary logic operates at 5 V.
• Mixed-Voltage Circuits: Powers systems combining 5 V devices (like shift registers) and 3.3 V devices (like SD card modules).
• Portable Project Testing: Allows developers to test battery-powered circuits using a bench supply before final power optimization.

Equivalent Models:

• MB102 Breadboard Power Supply: A widely recognized model that provides the same dual-rail 3.3V/5V functionality and form factor.
• Breadboard Mini Power Module: Often used interchangeably with the XD-42, offering the same dual-channel, selectable voltage outputs.
• Generic 3.3V/5V Breadboard Supply: Many unbranded modules replicate this exact design and function, however, the XD-42 offers proven reliability.

Package Includes:

• 1 x XD-42 Dual Channel 3.3V 5V Breadboard Power Supply Module