| 摘要 |
PURPOSE:To perform the broadcasting of the same content at a regular time of every day without manual operation, by turning on and off a play switch with signals from a timer and a nonrecording part detecting circuit via a differentiation circuit and a latch circuit. CONSTITUTION:A tape recorded in advance is set to a magnetic recorder and reproducer. When a power supply voltage is applied to the timer 1, an output of the latch circuit 10 is set with a positive pulse from the differentiation circuits C1, D1, a switch 7 is turned on, a current flows to a play plunger 5 to set the play mode. When the content of reproduction for one broadcasting's share is finished and a reproducing head 2 comes to the nonrecording part, an output of an intermusic detection circuit 4 goes to high potential, the output of the circuit 10 is inverted with outputs of differentiation circuits C2, D2, the switch 7 is turned off to obtain the stop mode. Every time the timer 1 is turned on, the similar operation is repeated. After the end of the final reproduction comes and the timer 1 is turned off and turned on again, then the output of the circuit 4 sets a program end detecting circuit 8, and when the nonrecording state continues for a prescribed time, the output of the circuit 8 turns on a switch 9 to rewind the tape. |
