Inert Mechanical Time Delay (Hours)

The X-ray correct, inert, mechanical time delay firing circuit contains all of the necessary components of an improvised explosive device (IED). The circuit is fully functional and will demonstrate that the firing switch has been activated by illuminating the LED in the blasting cap. The circuit board contains an X-ray correct battery, wire, switch, detonator, and inert explosive.

Powered by two AA batteries, this IED circuit would be activated by a mechanical time alarm circuit. The military TNT simulant is engineered to have the same density and effective atomic number (Zeff) as the real explosive threat.