| 摘要 |
PURPOSE:To prevent the malfunction of a circuit due to a voltage drop during illumination by stopping the driving of a step motor during the illumination and correcting the stop time of the step motor after an illuminating device is turned off. CONSTITUTION:Normally, a signal obtained by processing the output of a quartz oscillating circuit 2 by frequency division 3 is inputted to a step motor driving circuit 4 to drive a step motor at intervals of one second. With a switch 8 closed, a lamp 6 turn on and control 9 is so exercised that a step motor driving signal is not outputted from the step motor driving circuit 4. After the switch 8 is opened, step motor driving pulses which should have been outputted during lamp illumination are outputted to the step motor 5 at a time. |
