| 摘要 |
An electrically-driven power tool includes a power supply circuit capable of outputting a plurality of DC voltages different in level through conversion of a commercial AC voltage. A lamp and its associated switch are provided. When the switch is turned ON to light the lamp, the DC voltage is applied to the lamp so that voltage gradually increases up to a predetermined level during a predetermined period of time. By doing so, a voltage being applied, for example, to a microcomputer from the power supply circuit is prevented from momentarily lowering at the time when the switch is turned ON.
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