JPS54100721A - Electric circuit for camera - Google Patents

Electric circuit for camera

Info

Publication number
JPS54100721A
JPS54100721A JP755478A JP755478A JPS54100721A JP S54100721 A JPS54100721 A JP S54100721A JP 755478 A JP755478 A JP 755478A JP 755478 A JP755478 A JP 755478A JP S54100721 A JPS54100721 A JP S54100721A
Authority
JP
Japan
Prior art keywords
points
led
scr
point
resistor
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
JP755478A
Other languages
Japanese (ja)
Inventor
Akira Takahashi
Shinichiro Koshiishi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP755478A priority Critical patent/JPS54100721A/en
Priority to US06/006,225 priority patent/US4305648A/en
Priority to DE2942435A priority patent/DE2942435C2/en
Priority to DE2954054A priority patent/DE2954054C2/en
Priority to DE2902891A priority patent/DE2902891C2/en
Publication of JPS54100721A publication Critical patent/JPS54100721A/en
Priority to US06/152,764 priority patent/US4375912A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent an erroneous display and the idle trip of a shutter by holding the condition of a warning mode with the use of a switching element having a holding function.
CONSTITUTION: In a timer circuit, a point B is connected through a resistor R1 with a point E, and a variable resistor VR1 is connected between the points A and E. The main terminal of a comparator COMP is connected with the points A and E. Moreover, a deflection warning light emitting diode LED is connected between the points A and E through a resistor R2, and an SCR is connected in parallel with the LED. Still moreover, the gate of the SCR is connected with the point B, and a switch SW1 has its contact 1 connected with the negative terminal of a DC power source EB and its other contacts 2 and 3 connected with the points E and B, respectively. Since the display of the LED is held by the SCR of such circuit, the erroneous display of the LED can be eliminated, and the idle trip of shutter can also be eliminated.
COPYRIGHT: (C)1979,JPO&Japio
JP755478A 1978-01-25 1978-01-25 Electric circuit for camera Pending JPS54100721A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP755478A JPS54100721A (en) 1978-01-25 1978-01-25 Electric circuit for camera
US06/006,225 US4305648A (en) 1978-01-25 1979-01-24 Electric circuits for use in camera
DE2942435A DE2942435C2 (en) 1978-01-25 1979-01-25 Electrical circuit for a camera
DE2954054A DE2954054C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera
DE2902891A DE2902891C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera
US06/152,764 US4375912A (en) 1978-01-25 1980-05-23 Electric circuits for use in camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP755478A JPS54100721A (en) 1978-01-25 1978-01-25 Electric circuit for camera

Publications (1)

Publication Number Publication Date
JPS54100721A true JPS54100721A (en) 1979-08-08

Family

ID=11669009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP755478A Pending JPS54100721A (en) 1978-01-25 1978-01-25 Electric circuit for camera

Country Status (1)

Country Link
JP (1) JPS54100721A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133027A (en) * 1973-03-20 1974-12-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133027A (en) * 1973-03-20 1974-12-20

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