Battery Capacity

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http://forum.allaboutcircuits.com – Hi all, In short, I am working on a device that is to take a pulse train from a microcontroller output (Duty Cycle < 0.5% @ 5V, 30 Hz), give it a current boost using a Darlington pair, and increase the signal of the voltage by a factor of 12 with a step-up transformer. In order to get an output on-time current pulse of around 40 mA it would mean that my Darlington pair current through the transformer primary windows would need to have an on-time value of around 500 mA. Ideally I would like to have this unit battery powered, and am considering using series AAs or a 9V, but not sure (Embedded)