| 摘要 |
PURPOSE:To precisely rotate a motor by controlling the drive and stop of a step motor with a flip-flop, a NOR gate and a counter. CONSTITUTION:An oscillator 1 is connected to a time limiter 2 and a frequency divider 3. The frequency divider 3 is connected to a drive unit 10, and the output of the drive unit 10 is connected to the step motor 5 of the time switch. A detector 6 detects a predetermined revolution of the motor 5 to produce a signal for stopping the motor. The limiter 2 is connected to the set terminal S of the flip-flop 11, the detector 6 is connected to the reset terminal R thereof, and one input of the NOR gate 12 and the clear terminal CL of the counter 13 are connected to the output terminal Q thereof. The frequency divider 3 is connected to the input terminal CK of the counter 13, and the output terminal Q1 and the terminal E for inhibiting the input of the counter 13 are connected to the other input side of the NOR gate 12. The output side of the NOR gate 12 is connected to the drive unit 10. |
