This is the main board of a homemade model rocket launch controller.  The master power LED has the following states: * off - master power switch is open * red - ignition switch is open and master switch is closed * green - ignition switch is closed and master switch is closed The each rocket pad LED has the following states: * off - ignition switch is closed * red - electric match leads are not connected * blue - electric match leads are connected and the arming switch is open * green - electric match leads are connected and arming switch is closed. When the launch button is pressed, 1A of 12V current should pass through the electric match.