| 摘要 |
PURPOSE:To make waking certain and to remove an unpleasant feeling by turning a power supply ON at the time of the operation of an ON-timer and generating alarm sound to gradually increase a sound volume and changing over the same to a sound or music at the stop time of an alarm. CONSTITUTION:A power supply circuit 12 is started at a set time by the power-ON signal 17 of a timer circuit 11 to supply power supply voltage to the whole of circuits and, at the same time, an alarm signal change-over circuit 2 selects an alarm signal 13 by a start signal 15 to input the same to an electronic volume 3 and the output of said volume is amplified by a sound amplifying circuit 4 to emit alarm sound from a speaker 5. Herein, since a sound volume control circuit 7 is started by the signal 15 to gradually raise sound volume control voltage 14, the alarm sound also becomes large gradually. When the alarm sound is forcibly stopped at this time by an alarm stop key 10, the alarm sound is changed over to a sound signal 1 and, when the alarm sound is not stopped, said alarm sound reaches the max. and is changed over after definite time but, since the sound volume at this time is not a value before the setting of the timer but becomes a predetermined value, even when the sound volume before the setting of the timer is throttled, a sound or music having a sound value urging waking is played. |
