Electronic detonator system

An electronic detonator for detonating an explosive and a system for performing blast operations in one or more blast holes are disclosed. The detonator includes a high voltage switch, an initiator and an initiating pellet, a primary circuit, a primary energy source and a secondary energy source. The detonator also includes a voltage converter for converting a low voltage to a high voltage, arranged to charge the primary energy source and a controller arranged in use to control the operation of the voltage converter. The detonator also includes a housing arranged to integrally package the high voltage switch, the initiator, the initiating pellet, the primary circuit, the primary and secondary energy sources, the voltage converter and the controller. The housing comprises a substantially puck shape having a through tunnel that extends through the puck, and a toroidal inductor arranged coaxial with the corresponding through tunnel, the inductor being coupled to the controller, and arranged to provide an inductive pickup for wireless communication with an external source in use.