1. A detonator assembly for initiating an explosive, comprising: a power source; an initiator; and a switch coupled between the power source and initiator, the switch having a trigger input responsive to a stimulus to activate the switch, activation of the switch to cause electrical energy to be provided from the power source to the initiator, wherein the stimulus comprises at least one of a clock-based stimulus, a pressure stimulus, a light stimulus, an acoustic stimulus, a vibration stimulus, and an electromagnetic stimulus.