Slides to Accompany a Video Tutorial on Harry Porter’s Relay Computer Harry Porter, Ph.D. Portland State University November 7, 2007 +V Double Throw Relay Double Throw Relay +V Four Pole, Double Throw Relay Four Pole, Double Throw Relay +V Schematic Diagrams Assume other terminal is connected to ground Schematic Diagrams +V Assume other terminal is connected to ground The “NOT” Circuit in out 1 out +V 0 in in out 0 1 1 0 Convention: “1” = +12V “0” = not connected