JPS55145035A - Flashing apparatus - Google Patents

Flashing apparatus

Info

Publication number
JPS55145035A
JPS55145035A JP5104179A JP5104179A JPS55145035A JP S55145035 A JPS55145035 A JP S55145035A JP 5104179 A JP5104179 A JP 5104179A JP 5104179 A JP5104179 A JP 5104179A JP S55145035 A JPS55145035 A JP S55145035A
Authority
JP
Japan
Prior art keywords
amplifier
comparator
current
voltage
oscillation circuit
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
JP5104179A
Other languages
Japanese (ja)
Inventor
Koichi Nishimura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5104179A priority Critical patent/JPS55145035A/en
Publication of JPS55145035A publication Critical patent/JPS55145035A/en
Pending legal-status Critical Current

Links

Landscapes

  • Audible And Visible Signals (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE:To increase flashing speed while reducing lighting rate to facilitate the confirmation of flashing by providing a comparator for comapring current in a display element with the reference current and an oscillation circuit for comparing threshold voltage with voltage across a time constant circuit. CONSTITUTION:When a switch S1 is turned either left or right, output 4 from a nonstable oscillation circuit constituted from an amplifier A2 and ambient circuits operates a relay RY to close a switch SRY and turn on and off incandescent lamps L1-L3 or L4-L6. An amplifier A1 is a comparator constituted from a difference amplifier used for detecting load current (or for detecting disconnection of wire) and compares voltage applied to the positive input terminal 6 of the amplifier A1 with the threshold value voltage. Also, the amplifier A1 is subjected to negative feed-back in the interior to constitute as a whole a logarithmic conversion circuit. Thus, the change of current in the incandescent lamp changes the threshold voltage of the oscillation circuit according to the output of the comparator to thereby change the flashing speed and lighting time.
JP5104179A 1979-04-24 1979-04-24 Flashing apparatus Pending JPS55145035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5104179A JPS55145035A (en) 1979-04-24 1979-04-24 Flashing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5104179A JPS55145035A (en) 1979-04-24 1979-04-24 Flashing apparatus

Publications (1)

Publication Number Publication Date
JPS55145035A true JPS55145035A (en) 1980-11-12

Family

ID=12875708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5104179A Pending JPS55145035A (en) 1979-04-24 1979-04-24 Flashing apparatus

Country Status (1)

Country Link
JP (1) JPS55145035A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003548A1 (en) * 1985-12-11 1987-06-18 Jasmond Pty. Ltd. Adaptive switching circuit
DE10346695B4 (en) * 2002-10-08 2008-08-07 Koito Manufacturing Co., Ltd. vehicle light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003548A1 (en) * 1985-12-11 1987-06-18 Jasmond Pty. Ltd. Adaptive switching circuit
DE10346695B4 (en) * 2002-10-08 2008-08-07 Koito Manufacturing Co., Ltd. vehicle light

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