An intrusion detection device including microcontroller, a light emitting diode (); a passive infrared motion detector module (), and a keypad (). All components comprising the device are contained in a box with a maximum volume of 12 cubic inches.
Luther Burbank Elementary School Oakland CA 1974-1979, Burckhalter Elementary School Oakland CA 1979-1981, Frick Junior High School Oakland CA 1981-1984, Eastside High School Oakland CA 1986-1986