| 摘要 |
PURPOSE:To generate an alarm tone when the time count output of a selected digit and the number of times operation of a confirming switch coincide with each other, by providing selecting switches for respective digits of the time and the confirming switch for the time. CONSTITUTION:A switch ST is depressed to generate the selecting output of the current time from a switching circuit SW, and the output of a time counting circuit CT is selected by a selecting circuit SE1. When a switch SH is depressed, the selecting output of the hour digit is generated from a selecting output generating circuit F, and the time count output of the hour digit out of outputs of the time counting circuit CT is selected by a selecting circuit SE2 and is supplied to a comparing circuit CN2. A switch SC is depressed while counting the number of times of depression. The number of times of depression is counted by a time counting circuit CK; and if this time coincides with contents of the hour digit of the time counting circuit CT, and output is generated from the comparing circuit CN2, and an alarm tone is generated from an alarm device SP by the output from a time alarm controlling circuit AC. When a switch SM10 is depressed, the output of the 10min digit of the time counting circuit CT is selected; and similarly, the switch SC is depressed, and the alarm tone is generated when the number of times of this depression coincides with the numeric value of the 10min digit. |
