| 摘要 |
PURPOSE:To enable a timer action for a plurality of dates by memorizing the setting fot the first, second dates and the like with a ring counter made up of a plurality of DFF circuits connected to an AM/PM output terminal of a single date timer IC. CONSTITUTION:A timer unit 1 is made up of a single date timer and a time setting device, and changes to H or L level at the output terminal of the timer depending on AM or PM. A ring 2 is made up of a DFF and an NOR circuit 8. With a date setting dial 3, a clear circuit 4, a delay circuit 5, differentiation circuits 6 and 7 and the like, the unit outputs a signal to identify AM and PM. The output of the unit is counted to actuate a single date timer IC as a timer circuit for a plurality of dates. |
