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.   Input power can be supplied to either the DC barrel jack or the two pin header labeled + and -. Output power is supplied to the pins labeled GND and VCC. Board has both an On/Off switch and a voltage select switch (3.3V/5V).    The two pairs of GND and VCC pins are spaced such that when connected to our Basic Breadboard both power busses will be powered. Features: 6-12V input voltage via barrel jack or 2-pin header.  3.3V or 5V regulated output voltage.   ON/OFF switch.  Output voltage select switch.  Power status LED.   PTC fuse protected power.   Dimensions: 2.15x0.65"