JPS5488736A - Voltage detector for battery - Google Patents

Voltage detector for battery

Info

Publication number
JPS5488736A
JPS5488736A JP16062977A JP16062977A JPS5488736A JP S5488736 A JPS5488736 A JP S5488736A JP 16062977 A JP16062977 A JP 16062977A JP 16062977 A JP16062977 A JP 16062977A JP S5488736 A JPS5488736 A JP S5488736A
Authority
JP
Japan
Prior art keywords
voltage
battery
memory
comparator
relay
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
JP16062977A
Other languages
Japanese (ja)
Inventor
Shunichi Sakaguchi
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP16062977A priority Critical patent/JPS5488736A/en
Publication of JPS5488736A publication Critical patent/JPS5488736A/en
Pending legal-status Critical Current

Links

Classifications

    • Y02E60/12—

Landscapes

  • Tests Of Electric Status Of Batteries (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To reduce the consumption, by detecting the voltage of battery to protect memory only when the power supply of the electronic devices having volatile memories is turned on, and producing alarm when the voltage is less than a given voltage.
CONSTITUTION: In the electronic device including volatile memory 4 powered with external power input AC 100V and powering the memory 4 with the battery 6 incorporated on mains failure, the switching circuit 13 is provided, which inputs the voltage of the battery 6 to the comparator 121 of the comparison circuit 12 when the power input AC 100V is fed to ROM2, CPU1, input and output interface 3 and memory 4. The circuit 13 is provided with the transistor Tr133 inputting the signal from the interface 3 and the relay 134 operated with the operation current of Tr133. The voltage of the battery 6 is fed to the comparator 121 via the contact 134' of the relay 134. Only when the power supply is turned on to the electronic device, the voltage of the battery 6 is compared with a given voltage, and if it is less than the given value, lamp 10 display is made.
COPYRIGHT: (C)1979,JPO&Japio
JP16062977A 1977-12-26 1977-12-26 Voltage detector for battery Pending JPS5488736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16062977A JPS5488736A (en) 1977-12-26 1977-12-26 Voltage detector for battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16062977A JPS5488736A (en) 1977-12-26 1977-12-26 Voltage detector for battery

Publications (1)

Publication Number Publication Date
JPS5488736A true JPS5488736A (en) 1979-07-14

Family

ID=15719054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16062977A Pending JPS5488736A (en) 1977-12-26 1977-12-26 Voltage detector for battery

Country Status (1)

Country Link
JP (1) JPS5488736A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234082A (en) * 1985-08-08 1987-02-14 Oki Electric Ind Co Ltd Circuit for detecting residual capacity of storage battery
JPS62162751U (en) * 1986-04-04 1987-10-16
JPH03182921A (en) * 1989-12-11 1991-08-08 Sharp Corp Electronic device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234082A (en) * 1985-08-08 1987-02-14 Oki Electric Ind Co Ltd Circuit for detecting residual capacity of storage battery
JPS62162751U (en) * 1986-04-04 1987-10-16
JPH03182921A (en) * 1989-12-11 1991-08-08 Sharp Corp Electronic device

Similar Documents

Publication Publication Date Title
EP1988443A3 (en) Suspend induced by AC power disturbance
JPS5569086A (en) Timer circuit
JPS5561801A (en) Unit using control device such as microcomputer
JPS5488736A (en) Voltage detector for battery
JPS554680A (en) Power source control system
JPS5394733A (en) Feeding circuit to volatile memory unit
JPS5529728A (en) Battery life display unit of electronic watch
JPS5688122A (en) Control circuit
TW235385B (en) Charging control device
JPS53148171A (en) Emergency lamp energizing device
JPS57188134A (en) Ac two-wire type contactless switch
JPS5321717A (en) Electric sewing machine erroneous action prevention system
JPS5459825A (en) Power unit for device using volatile memory
JPS57132233A (en) Keyboard device
JPH03132672A (en) Information equipment
JPS6281984U (en)
JPS5526481A (en) Electronic watch
JPS5647818A (en) Electric power supply circuit
JPS53147954A (en) Power consumption controller
JPS55112616A (en) Alternating current constant voltage unit
JPS5575125A (en) Checking apparatus for starting safety
JPS57105013A (en) Electronic computer
JPS5250267A (en) Electronic clock
JPS5287337A (en) Electric power source control procedure
JPS5638618A (en) Electronic circuit device having memory circuit and power supply device used for it