A detonation system for use with supply of electrical energy has user operable firing console for selectably transmitting unit identification information, firing delay time information and selections from a command set including Output, Delay, Fire (Time), Abort, Power Up (Arm), Input, and Store. The...http://www.google.com/patents/US4674047?utm_source=gb-gplus-sharePatent US4674047 - Integrated detonator delay circuits and firing console
