| 摘要 |
PURPOSE:To raise an alarm of a 5min unit by a simple constitution by combincombining a driving voltage applied to a minute display element in a device for driving and displaying separately each element of a fluorescent display tube consisting of seven segments. CONSTITUTION:Split resistances 4, 5 are constituted between terminals of each element number (5), (6) and (7) of 2 digits 2 and 3 of a minute display, and an earth, a voltage from a driving voltage B is supplied to logical circuits 6-10, and its output is inputted to a high density integrated circuit 15. Also, on the integrated circuit 15, an inputting circuit is formed by switches SW1-SW8 provided separately, so that a prescribed time is set and inputted. In this state, a logical output of every 5min, and an output of every 10min are outputted in case a display of 1 digit is is ''0'' and 5, and in case the display of 1 digit is ''0'', respectively, and an alarm sound generating circuit 19 is driven for a prescribed time through a multivibrator 16. In this way, a conventional timepiece display remains as it is, and the output can be obtained easily. |
