Electronic Circuit Recommendations/design

I am in need of a programmable countdown circuit(CDC). Two leads will connect the CDC to a master controller, the controller will issue a continuity check from 6-36 volts at no more than 40ma. The CDC should ignore this check. When a run condition is sent from the master controller of 6-36 volts at >5amps the CDC will begin a countdown that is programmable to the millisecond, but can range from 1ms to several seconds. After the run condition is sent the CDC is physically detached from the master controller and therefore must have some sort of on board power storage. Once the countdown has expired the CDC will open a gate and release around 1 amp of power for about 50-100ms. I am open to different ideas on how to accomplish this. I need a design that uses very inexpensive components, as low as $0.50 if possible. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform Electronics