| 摘要 |
An electronic controller having a pair of sequential outputs for energizing a line voltage AC load or loads in the manner of a single pole double throw (SPDT) switch. The controller comprises a pair of mutually exclusively operated timers, each having an adjustable timing circuit associated therewith. The output from each timer operates a triac which couples power to the load. A termination circuit including a pair of flip-flops and an operating switch is associated with the timers for terminating at any time the present state of the controller and commencing the other state without introducing a timing error.
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