| 摘要 |
PURPOSE:To prevent a battery from becoming completely flat in synchronized flash photography by a stroboscope by turning off a stroboscope power source unless a light emission ready signal and a charge end signal are outputted within different specific reference times. CONSTITUTION:When the voltage of a battery E is supplied to a CPU1 by turning on a switch S1, the switching transistor (TR) of a stroboscope unit 2 is turned on by the CPU1 and the unit 2 starts operating. Then, the CPU1 turns off the TR of the unit 2 unless the light emission ready signal is inputted from the unit 2 within the 1st reference time after the charge start of the main capacitor of the unit 2 and the charge end signal is inputted from the unit 2 within the 2nd reference time whose end is later than the 1st reference time, thereby cutting off the electric power supply to the unit 2 when the voltage of the battery E drops. Thus, the battery becomes completely flat in stroboscope photography and a film winding and a rewinding device, etc., are put in operation. |
