JPS5557177A - Digital timer - Google Patents
Digital timerInfo
- Publication number
- JPS5557177A JPS5557177A JP13031178A JP13031178A JPS5557177A JP S5557177 A JPS5557177 A JP S5557177A JP 13031178 A JP13031178 A JP 13031178A JP 13031178 A JP13031178 A JP 13031178A JP S5557177 A JPS5557177 A JP S5557177A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- time
- setting
- counters
- counting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Predetermined Time Intervals (AREA)
Abstract
PURPOSE: To increase the field of application for the digital timer by delivering the alarm tone at the time-up detection time and at the same time counting and displaying the time-up number.
CONSTITUTION: When the setting is over for all timer time of the hour, minute and second each, the output of shift register 13 and NOR circuit 24 feature the levels of "0" and "1" each. And setting end signal is applied to preset circuits 7W9 via OR circuit 31. Thus the setting time information is teransferred to down-counters 10W 12. Then F/F26 is set via AND circuit 19 when switch 28 is turned on, and output Q of level "1" opens AND circuit 17 to make the counter start the down-counting. When all counters feature zero, zero detection circuit 30 operates to make AND circuit 18 drive the sound generation device via NOR circuit 23. At the same time, circuit 31 operates to preset the setting time information to counters 7W9 as well as to make repeat counter 6 carry out the up-counting. Thus the set time and the repeat frequency can be known.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13031178A JPS5557177A (en) | 1978-10-23 | 1978-10-23 | Digital timer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13031178A JPS5557177A (en) | 1978-10-23 | 1978-10-23 | Digital timer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5557177A true JPS5557177A (en) | 1980-04-26 |
Family
ID=15031280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13031178A Pending JPS5557177A (en) | 1978-10-23 | 1978-10-23 | Digital timer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5557177A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5782787A (en) * | 1980-11-11 | 1982-05-24 | Seiko Epson Corp | Real time clock |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53144377A (en) * | 1977-05-20 | 1978-12-15 | Sharp Corp | Repeating timer |
-
1978
- 1978-10-23 JP JP13031178A patent/JPS5557177A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53144377A (en) * | 1977-05-20 | 1978-12-15 | Sharp Corp | Repeating timer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5782787A (en) * | 1980-11-11 | 1982-05-24 | Seiko Epson Corp | Real time clock |
JPS6360873B2 (en) * | 1980-11-11 | 1988-11-25 |
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