The breadboard power supply stick regulates voltage from a 9V wall wart to either 5V or 3.3V to the power rails. A simple circuit, involving a button, an LED, and a resistor, built two different ways. The circuit goes as follows: There is a wire connecting the VCC power rail to the positive, anode leg of an LED. Categories: LED Light Drivers & Power Modules, Power Supplies, Sensors & Modules, Tools
