JPS5473023A - Light source circuit for camera data photographing - Google Patents
Light source circuit for camera data photographingInfo
- Publication number
- JPS5473023A JPS5473023A JP14017977A JP14017977A JPS5473023A JP S5473023 A JPS5473023 A JP S5473023A JP 14017977 A JP14017977 A JP 14017977A JP 14017977 A JP14017977 A JP 14017977A JP S5473023 A JPS5473023 A JP S5473023A
- Authority
- JP
- Japan
- Prior art keywords
- chattering
- light source
- circuit
- data
- potential
- 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
- Camera Data Copying Or Recording (AREA)
Abstract
PURPOSE: Not to cause the lighting circuit of the light source for use in data photographing to respond to a false signal by providing a filter circuit consisting of capacitor which absorbs the influence of chattering is series with a switch which starts the data photography.
CONSTITUTION: Instruction for data photographing issues with closing of synchro- switch S4 of the camera. Trigger circuit of SC of SCR comprises parallel circuit of R6 and C4 connected to one end of S4 and series circuit of C3 and R7 connected between two terminals of D4, and the connecting point of C3 with R7 is coupled to gate of SC. Time constant of R6 and C4 is set sufficiently larger than the period of chattering of S4, and it never happens that the potential changes vibratorily at the point P1, although chattering takes place when S4 is closed. The potential at P1 approaches to the positive potential almost instantly by closing of S4, but no response occurs regardless of chattering. In addition, L1 is lamp of the light source for data photography.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14017977A JPS5473023A (en) | 1977-11-22 | 1977-11-22 | Light source circuit for camera data photographing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14017977A JPS5473023A (en) | 1977-11-22 | 1977-11-22 | Light source circuit for camera data photographing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5473023A true JPS5473023A (en) | 1979-06-12 |
Family
ID=15262722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14017977A Pending JPS5473023A (en) | 1977-11-22 | 1977-11-22 | Light source circuit for camera data photographing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5473023A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6013535U (en) * | 1983-07-08 | 1985-01-29 | 株式会社ニコン | Data imprint control device |
JPS6333148U (en) * | 1986-08-18 | 1988-03-03 |
-
1977
- 1977-11-22 JP JP14017977A patent/JPS5473023A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6013535U (en) * | 1983-07-08 | 1985-01-29 | 株式会社ニコン | Data imprint control device |
JPS6333148U (en) * | 1986-08-18 | 1988-03-03 |
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