A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

Logging apparatus, methods and electronic detonators are presented for logging data, wherein the logger transmits read request messages to preprogrammed electronic detonators without transmitting any delay programming messaging, receives and stores electronic detonator data from a given one of the preprogrammed electronic detonators, and sends a verify command to cause the detonator to update its status flag to prevent the given electronic detonator from responding to subsequent read request messages.

Logging apparatus, methods and electronic detonators are presented for logging data, wherein the logger transmits read request messages to preprogrammed electronic detonators without transmitting any delay programming messaging, receives and stores electronic detonator data from a given one of the preprogrammed electronic detonators, and sends a verify command to cause the detonator to update its status flag to prevent the given electronic detonator from responding to subsequent read request messages.

Logging apparatus, methods and electronic detonators are presented for logging data, wherein the logger transmits read request messages to preprogrammed electronic detonators without transmitting any delay programming messaging, receives and stores electronic detonator data from a given one of the preprogrammed electronic detonators, and sends a verify command to cause the detonator to update its status flag to prevent the given electronic detonator from responding to subsequent read request messages.

An ignition system includes electronic detonators and signalling devices. Each signalling device is associated with one electronic detonator and allows the presence of the electronic detonator with which it is associated to be signalled. The ignition system further includes an image capture device that is designed and positioned to capture images depicting the signalling devices. Use to verify the presence of electronic detonators on a worksite.

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

Logging apparatus, methods and electronic detonators are presented for logging data, wherein the logger transmits read request messages to preprogrammed electronic detonators whithout transmitting any delay programming messaging, receives and stores electronic detonator data from a given one of the preprogrammed electronic detonators, and sends a verify command to cause the detonator to update its status flag to prevent the given electronic detonator from responding to subsequent read request messages.

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

Detonation control modules and detonation control circuits are provided herein. A trigger input signal can cause a detonation control module to trigger a detonator. A detonation control module can include a timing circuit, a light-producing diode such as a laser diode, an optically triggered diode, and a high-voltage capacitor. The trigger input signal can activate the timing circuit. The timing circuit can control activation of the light-producing diode. Activation of the light-producing diode illuminates and activates the optically triggered diode. The optically triggered diode can be coupled between the high-voltage capacitor and the detonator. Activation of the optically triggered diode causes a power pulse to be released from the high-voltage capacitor that triggers the detonator.

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.