| 摘要 |
PURPOSE:To make it unnecessary to confirm a time from an indication of a clock, by informing the number of times of operations for temporary stoppage after these operations are performed. CONSTITUTION:When an alarm switch S1 is closed at a set time, an alarm signal from a frequency division circuit D is supplied to a transistor Tr, and thereby an alarm sound is emitted from a speaker SP. When a switch S2 is once closed, the alarm sound is stopped temporarily, while a counter CT2 counts ''1''. When the switch S2 is opened, the content ''1'' of the counter CT2 is presetted in a down counter DC. Meanwhile, a pulse P1 of narrow width is generated from a shaping circuit A in one-second period, AND thereof with a pulse P2 of several kHz from the frequency division circuit D is taken, and an information sound is emitted from the speaker SP. This information sound is generated once, informing that the operation for temporary stoppage is the first one. Several minites later, an output is generated and thereby the alarm sound is generated again. In this way, the counter CT2 counts the number of times of the operations for temporary stoppage, and the information sound is generated by said number. |
