Need a clean way to get power to your breadboard this is a very simple pre-assembled board that takes a supply voltage of 6-12vdc and outputs a selectable 5V or 3.3V regulated voltage. All headers are 0.1 inch pitch for simple insertion into a breadboard power and ground rails. It can be either powered from 6-12 DC2.1 power jack or from USB power (via USB type-b connector), sold separately. The maximum current it can provide is 500MA. No assembly required.