JPS5494298A - Selective display circuit of switches - Google Patents
Selective display circuit of switchesInfo
- Publication number
- JPS5494298A JPS5494298A JP164478A JP164478A JPS5494298A JP S5494298 A JPS5494298 A JP S5494298A JP 164478 A JP164478 A JP 164478A JP 164478 A JP164478 A JP 164478A JP S5494298 A JPS5494298 A JP S5494298A
- Authority
- JP
- Japan
- Prior art keywords
- output
- becomes
- input
- lamp
- energized
- 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.)
- Granted
Links
Landscapes
- Keying Circuit Devices (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Audible And Visible Signals (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
PURPOSE: To simplify electrical connection constitution and facilitate its expansion as well by so arranging the circuit that when one out of (n) push-buttons is selected and depressed the corresponding code is generated and the corresponding lamp displays.
CONSTITUTION: Clock ϕ 1 causes the output of a decoder 5 to reiterate L cyclically to (a)-(b)-(c)-(d)-(b). Here, when a switch PBS 2 is depressed immediately before the output (c) becomes L, a lamp driver LD is energized and the output becomes L which then enters an inverter 7 via the switch PBS 2. This applies H to the K input of an FF 1, then the FF 1 inverts upon entering of the negative pulse of the clock (A), thus its Q output becomes L and its -Q output becomes H. According to this, a relay driver DR is energized to turn ON the contact (r) of a relay R, thereby causing a lamp LP 2 to light. Along with this, the (B) input of a counter 4 becomes normally H, thus stopping the stepping. The (c) input of the decoder 5 is held at normally L and its output (C) maintains L. This state is released by depressing the switch PBS.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP164478A JPS5494298A (en) | 1978-01-10 | 1978-01-10 | Selective display circuit of switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP164478A JPS5494298A (en) | 1978-01-10 | 1978-01-10 | Selective display circuit of switches |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5494298A true JPS5494298A (en) | 1979-07-25 |
JPS6255249B2 JPS6255249B2 (en) | 1987-11-19 |
Family
ID=11507220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP164478A Granted JPS5494298A (en) | 1978-01-10 | 1978-01-10 | Selective display circuit of switches |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5494298A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5626820U (en) * | 1979-08-09 | 1981-03-12 | ||
JPS5674034A (en) * | 1979-11-20 | 1981-06-19 | Nippon Telegraph & Telephone | Control device |
-
1978
- 1978-01-10 JP JP164478A patent/JPS5494298A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5626820U (en) * | 1979-08-09 | 1981-03-12 | ||
JPS5674034A (en) * | 1979-11-20 | 1981-06-19 | Nippon Telegraph & Telephone | Control device |
JPH0132606B2 (en) * | 1979-11-20 | 1989-07-07 | Nippon Denshin Denwa Kk |
Also Published As
Publication number | Publication date |
---|---|
JPS6255249B2 (en) | 1987-11-19 |
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