This 40hr course reveals how modern electronics offer the terrorist a broad range of options for device design and construction. Assuming no previous knowledge of electronics, participants gain a practical understanding of devices such as collapsing circuits (traditional and solid state), modification of commercial technologies for use in IEDs, and remote-controlled IEDs (RCIEDs), including dual tone multi-frequency (DTMF), and other coding systems. The course begins with an outline of electrical theory and Ohm’s Law, followed by an introduction to a wide variety of electronic components. Emphasis is placed on the characteristics of electronic components and circuits that make them attractive to the terrorist and the characteristics that often cause training devices to fail. Students learn primarily by building circuits.