JPS5473023A - Light source circuit for camera data photographing - Google Patents

Light source circuit for camera data photographing

Info

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
Application number
JP14017977A
Other languages
Japanese (ja)
Inventor
Seiji Yamada
Norio Beppu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP14017977A priority Critical patent/JPS5473023A/en
Publication of JPS5473023A publication Critical patent/JPS5473023A/en
Pending legal-status Critical Current

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
JP14017977A 1977-11-22 1977-11-22 Light source circuit for camera data photographing Pending JPS5473023A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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