JPS5619476A - Alarm unit - Google Patents

Alarm unit

Info

Publication number
JPS5619476A
JPS5619476A JP9527879A JP9527879A JPS5619476A JP S5619476 A JPS5619476 A JP S5619476A JP 9527879 A JP9527879 A JP 9527879A JP 9527879 A JP9527879 A JP 9527879A JP S5619476 A JPS5619476 A JP S5619476A
Authority
JP
Japan
Prior art keywords
buzzer
varying
alarm unit
sound
time
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
JP9527879A
Other languages
Japanese (ja)
Inventor
Mitsuru Toyoda
Tomohiko Abe
Keigo Takeda
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP9527879A priority Critical patent/JPS5619476A/en
Publication of JPS5619476A publication Critical patent/JPS5619476A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G13/00—Producing acoustic time signals
    • G04G13/02—Producing acoustic time signals at preselected times, e.g. alarm clocks
    • G04G13/021—Details
    • G04G13/023—Adjusting the duration or amplitude of signals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To obtain an alarm sound with the envelope effect by varying the continuity time of a buzzer. CONSTITUTION:A pulse signal is supplied from MOS-IC3 to the base of transistor 2 and when it is at level H, electric current flows through buzzer 1 from battery 4, giving a buzzing sound. At this time, varying the duty of the width of pulses from IC3 varies the sound volume of the buzzer, obtaining the envelope effect.
JP9527879A 1979-07-26 1979-07-26 Alarm unit Pending JPS5619476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9527879A JPS5619476A (en) 1979-07-26 1979-07-26 Alarm unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9527879A JPS5619476A (en) 1979-07-26 1979-07-26 Alarm unit

Publications (1)

Publication Number Publication Date
JPS5619476A true JPS5619476A (en) 1981-02-24

Family

ID=14133300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9527879A Pending JPS5619476A (en) 1979-07-26 1979-07-26 Alarm unit

Country Status (1)

Country Link
JP (1) JPS5619476A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0293595A (en) * 1988-09-30 1990-04-04 Toshiba Corp Buzzer driving circuit
JPH0575800U (en) * 1992-03-13 1993-10-15 矢崎総業株式会社 Buzzer attenuation sound generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0293595A (en) * 1988-09-30 1990-04-04 Toshiba Corp Buzzer driving circuit
JPH0575800U (en) * 1992-03-13 1993-10-15 矢崎総業株式会社 Buzzer attenuation sound generator

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