| 摘要 |
PURPOSE:To control oscillating action of a TV camera with operation of a switch, by controlling the operation of a reversible motor that gives an oscillating motion to the TV camera via a single electric wire plus a common earth wire. CONSTITUTION:When the voltage of 14V is applied to the input terminal 62 from the battery 68 with operation of a switch, one transistor TR65 permits the electric conduction from the collector 56c to the emitter 56e; while the other transistor TR58 cuts off the collector from the emitter. The collector-emitter current of the TR56 flows from one connection terminal 40a to the other connection terminals 40b of the motor 40, to turn said motor 40 in one direction. As a result, the TV camera has the oscillating action in a single way while the voltage of 14V is applied to the terminal 64. With application of the earth voltage of the terminal 62, the current flows to the terminal 40a from the terminal 40b of the motor40. Thus the TV camera has the oscillating action in the opposite direction while the earth voltage is applied to the terminal 6. |
