| 摘要 |
PURPOSE:To execute a motor control, an exposure control, etc. even when a power source is consumed, by operating a boosting means when a motor is operated, continuing the operation of the boosting means for a prescribed time by a timer after the operation of the motor is ended, and thereafter, stopping the operation of the boosting means. CONSTITUTION:Rewinding of a film is executed by turning on a DC/DC coverter 7, turning on transistors 4, 5, and conducting in the direction opposite to the winding time. This rewinding operation is continued during on by deciding whether a rewinding switch is on or off, and when it turns off, the conduction to the motor 1 is stopped by turning off the transistors 4, 5, and the rewinding is ended. After the rewinding is ended, in the same way as the winding time, a sufficient time by which the voltage of a battery after the load of the motor is gone is restored to an initial level is set and started by a probrammable time 10. The programmable timer 10 decides whether counting is ended or not, and when it is ended, the DC/DC converter 7 is turned off.
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