| 摘要 |
The charge rate of a charging capacitor is controlled by the resistance of a photocell that is in turn controlled by the flashing rate of a flashing light, and the charge level of the charge capacitor energizes a uni-directional device that biases an SCR device to the ON condition closing a DC power circuit. The flashing rate of the flashing lamp is adjustable to establish a charge rate of the charge capacitor.
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