| 摘要 |
A flasher circuit has a power transistor controlling a circuit with a load therein; a multivibrator produces a timing signal applied to a second transistor for pulsing and turning "on" a related third control transistor which is effective in response thereto to apply a relatively small current flow to the load to preheat the load before application of the full current; additional semiconductor means, sensitive to a voltage signal or loss thereof in the load circuit due to the occurrence of a short, are effective for preventing the power transistor from being made conductive.
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