| 摘要 |
PURPOSE:To enable to accurately control the rotating angle of a DC motor irrespective of the magnitude of a load by rising the output of a rectangular signal generator by a start signal, and falling it by a signal generated whenever the prescribed angle is rotated. CONSTITUTION:When a control signal 201 of a control signal generator 21 is altered from a low level to a high level, a monostable multivibrator 22 generates a rectangular signal 202 varying from low level to high level. A drive circuit 12 power-amplifies the signal 202 and supplies it to a DC motor 3. A gear train rotation detector 23 outputs an angle detection signal 203 when a gear rotates at the prescribed angle, a Schmitt circuit 24 waveform-shapes the signal 203 to an angle detection pulse signal 204 to the reset terminal of a monostable multivibrator 22. Thus, the signal 202 becomes low level, and the motor 3 is stopped. |
