From Makers Electronics's description
MB102 Breadboard Power Supply Module 3.3V/5V The 3.3V/5V output MB102 Breadboard power supply module is an easy to use, most useful breadboard component that can be added with any breadboard related projects where 5V, 3.3V or both power requirements are required. Its ease of use allows users to connect any DC power supply unit that has 6.5-12 VDC power output from a barrel jack. The board has two independent channels of power output for breadboards. These power channels can be independently configured for 3.3V, 0V, and 5V operations. The Breadboard power supply has 3.3V/5V selectable output on two channels. The maximum current can be drawn is 700mA. The selection of the output voltage is independent on each channel and the user can select the output voltage by changing jumpers separately. At the input section, a DC barrel socket and USB-A socket is available. Anyone of these two can be used to power up the module. There is an ON-OFF switch available along with a power-on status LED. Use a 6.5-12VDC power supply for powering up the module. The MB102 module also offers a push switch to turn OFF and ON the entire power supply module. An additional feature is a USB input with two 5V, two 3.3V, and 4 GND pinouts for additional power pin requirements. The power LED will notify the user of the input power availability status. Features: Selectable 3.3V or 5V output via jumpers Dual independent power rails (left and right) Compatible with standard 830-point breadboards Powered by USB or DC barrel jack (6.5V–12V input) Onboard AMS1117 voltage regulators Built-in power LED indicators On/off power switch for convenience Compact, plug-and-play design Specifications: Specification Value Input voltage 6.5V – 12 V Channels Two independent channels Output voltage 5V, 3.3V (adjustable via jumpers: 0V, 3.3V, 5V configuration) Output current Maximum 700 mA Power headers Onboard Berg male header for GND, 5V, 3.3V output Power switch ON-OFF switch available USB input USB Type-A input available DC input DC barrel jack input available Indicator Onboard power LED Dimensions 53 mm × 33 mm (L × W) PINOUT: Pin Name Description LEFT Jumper 5V, OFF (0V), 3.3V Selection RIGHT Jumper 5V, OFF (0V), 3.3V Selection 4-Berg Header GND 2-Berg Header 3.3V 2-Berg Header 5V Applications: Prototyping with microcontrollers (Arduino, ESP32, Raspberry Pi Pico) Powering sensors, modules, and small actuators Educational electronics and STEM learning kits DIY electronic gadgets and robotics Rapid testing and circuit development on breadboards Useful Links: MB102 Datasheet
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