| 摘要 |
PURPOSE:To eliminate erroneous movement due to the drop of voltage by connecting ordinarily two batteries in parallel to the watch circuit to supply electric power and by connecting in the case of heavy load one battery to the watch circuit and the other battery to a circuit that is heavily loaded. CONSTITUTION:If a line switch 104 is turned on an MOS transistor 109 is turned off and a battery 106 supplies electric power to a lamp 105, and a battery 107 supplies electric power to an electronic circuit 108. Driving an alarm function is also performed in the same way. When the lamp and the sound generation device are not being driven, the MOS transistor 109 is on, and the batteries 106 and 107 are connected in parallel to the electronic circuit 108 to supply electric power. |
