JPS57161566A - Voltage checking device - Google Patents

Voltage checking device

Info

Publication number
JPS57161566A
JPS57161566A JP56047398A JP4739881A JPS57161566A JP S57161566 A JPS57161566 A JP S57161566A JP 56047398 A JP56047398 A JP 56047398A JP 4739881 A JP4739881 A JP 4739881A JP S57161566 A JPS57161566 A JP S57161566A
Authority
JP
Japan
Prior art keywords
voltage
comparator
output
level
electromagnet
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
Application number
JP56047398A
Other languages
Japanese (ja)
Other versions
JPH0380288B2 (en
Inventor
Takuma Kumeta
Masaaki Takagi
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.)
Nidec Copal Corp
Original Assignee
Nidec Copal Corp
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 Nidec Copal Corp filed Critical Nidec Copal Corp
Priority to JP56047398A priority Critical patent/JPS57161566A/en
Publication of JPS57161566A publication Critical patent/JPS57161566A/en
Publication of JPH0380288B2 publication Critical patent/JPH0380288B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries

Abstract

PURPOSE:To make an accurate voltage check possible, by utilizing the output of a counter to make the period to check a voltage succeed to the current consumption of a load circuit attained to the steady state after closing of a power switch. CONSTITUTION:In the electric shutter circuit of a camera, a monostable multivibrator OM is triggerred by the connection of a power switch S1 to contacts (a)-(b) and outputs H-level pulses for a constant time, and an oscillator O starts the operation to generate clock pulses of 4KHz. After a prescribed operation of the circuit, an electromagnet Mg having inductance components is operated. The terminal voltage of a battery B is divided by resistances R3 and R4 and is applied to an inverted input terminal of a comparator CM3, and the output of the comparator CM3 becomes H-level if the voltage of the battery is deficient. After a counter consisting of the oscillator O and flip flops F1-F10 counts 8ms, the feed to the electromagnet Mg is broken and the lighting of an LED is inhibited if the output of the comparator CM3 is H-level.
JP56047398A 1981-03-31 1981-03-31 Voltage checking device Granted JPS57161566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56047398A JPS57161566A (en) 1981-03-31 1981-03-31 Voltage checking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56047398A JPS57161566A (en) 1981-03-31 1981-03-31 Voltage checking device

Publications (2)

Publication Number Publication Date
JPS57161566A true JPS57161566A (en) 1982-10-05
JPH0380288B2 JPH0380288B2 (en) 1991-12-24

Family

ID=12774003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56047398A Granted JPS57161566A (en) 1981-03-31 1981-03-31 Voltage checking device

Country Status (1)

Country Link
JP (1) JPS57161566A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132177U (en) * 1977-03-25 1978-10-19
JPS5458831A (en) * 1977-10-19 1979-05-11 Canon Kk Battery checker circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132177U (en) * 1977-03-25 1978-10-19
JPS5458831A (en) * 1977-10-19 1979-05-11 Canon Kk Battery checker circuit

Also Published As

Publication number Publication date
JPH0380288B2 (en) 1991-12-24

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