JPS5732427A - Camera circuit - Google Patents

Camera circuit

Info

Publication number
JPS5732427A
JPS5732427A JP10767480A JP10767480A JPS5732427A JP S5732427 A JPS5732427 A JP S5732427A JP 10767480 A JP10767480 A JP 10767480A JP 10767480 A JP10767480 A JP 10767480A JP S5732427 A JPS5732427 A JP S5732427A
Authority
JP
Japan
Prior art keywords
solar batteries
secondary voltage
current
output
voltage
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
JP10767480A
Other languages
Japanese (ja)
Inventor
Masamichi Furukawa
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 JP10767480A priority Critical patent/JPS5732427A/en
Publication of JPS5732427A publication Critical patent/JPS5732427A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/26—Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE:To save solar batteries and to prevent the discharge of secondary voltage by putting a displaying and other functions in operation, by supplying electric power to a load from the solar batteries when the output of the solar batteries becomes large enough to operate the load. CONSTITUTION:Secondary voltage E2 is charged by the output of solar batteries E1 all the time, and even if the voltage of the solar batteries E1 drops, the reverse- current preventing operation of a diode D1 prevents discharge from the secondary voltage E2 to the solar batteries E1. Since the output of the solar batteries E1 is supplied to a load L via a diode D2, the output voltage of the solar batteries E1, when reaching a sufficient level, puts a displaying and other functions in operation. In releasing a shutter, on the other hand, a switch S1 turning on at the same time supplies a current from the secondary voltage E2 in addition to a current from the solar batteries E1, and consequently a solar current required for a coil for releasing the shutter flows. The diode D2 stops a current flowing reverse from the secondary voltage E2 to the solar batteries E1 through the switch S1.
JP10767480A 1980-08-07 1980-08-07 Camera circuit Pending JPS5732427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10767480A JPS5732427A (en) 1980-08-07 1980-08-07 Camera circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10767480A JPS5732427A (en) 1980-08-07 1980-08-07 Camera circuit

Publications (1)

Publication Number Publication Date
JPS5732427A true JPS5732427A (en) 1982-02-22

Family

ID=14465110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10767480A Pending JPS5732427A (en) 1980-08-07 1980-08-07 Camera circuit

Country Status (1)

Country Link
JP (1) JPS5732427A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012046613A1 (en) * 2010-10-08 2012-04-12 三洋電機株式会社 Ground fault detection circuit, and ground fault detection device
JP2012083175A (en) * 2010-10-08 2012-04-26 Sanyo Electric Co Ltd Grounding detecting device
JP2013036915A (en) * 2011-08-10 2013-02-21 Sanyo Electric Co Ltd Earth detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012046613A1 (en) * 2010-10-08 2012-04-12 三洋電機株式会社 Ground fault detection circuit, and ground fault detection device
JP2012083175A (en) * 2010-10-08 2012-04-26 Sanyo Electric Co Ltd Grounding detecting device
US8797042B2 (en) 2010-10-08 2014-08-05 Sanyo Electric Co., Ltd. Ground fault detection circuit and ground fault detection apparatus
JP2013036915A (en) * 2011-08-10 2013-02-21 Sanyo Electric Co Ltd Earth detector

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