This is a very simple board that takes a 6-12V input voltage and outputs a selectable 5V or 3.3V regulated voltage. All headers are 0.1\” pitch for simple insertion into a breadboard. It can be either powered from 6-12 DC2.1 power jack or from USB power. The maximum current it can provide is 500mA. Specification Input voltage: 6-12V (Power Jack) 5V (USB) Output voltage:3.3V/5V Output current:500mA On/Off switch Power status LED Pin Head 5/3.3V output Central positive DC2.1 power jack Documents Schematics Shipping List Breadboard Power Unit (Assembled) x1