Breadboard Power Supply (MB102)

The MB102 module plugs straight into the power rails of a standard 830-point breadboard and feeds both sides from a single input. It accepts 6.5–12 V DC through a barrel jack or 5 V from USB, and two AMS1117 regulators produce the outputs, with a jumper on each side choosing 3.3 V, 5 V or off. An on/off switch, power LED and extra header pins make it easy to power sensors and microcontrollers while prototyping. Total output is about 700 mA, which suits most low-power circuits but not motors or high-power LEDs.