JPS54114099A - Electronic chime - Google Patents

Electronic chime

Info

Publication number
JPS54114099A
JPS54114099A JP2139178A JP2139178A JPS54114099A JP S54114099 A JPS54114099 A JP S54114099A JP 2139178 A JP2139178 A JP 2139178A JP 2139178 A JP2139178 A JP 2139178A JP S54114099 A JPS54114099 A JP S54114099A
Authority
JP
Japan
Prior art keywords
duty ratio
pulse train
signal
tones
delivered
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
JP2139178A
Other languages
Japanese (ja)
Other versions
JPS5911119B2 (en
Inventor
Kazuaki Mayumi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2139178A priority Critical patent/JPS5911119B2/en
Publication of JPS54114099A publication Critical patent/JPS54114099A/en
Publication of JPS5911119B2 publication Critical patent/JPS5911119B2/en
Expired legal-status Critical Current

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  • Alarm Systems (AREA)
  • Toys (AREA)

Abstract

PURPOSE: To obtain an electronic chime featuring various kinds of tones through a simple constitution and simple operation.
CONSTITUTION: For input terminals 1NϕW1N3 of microcomputer MC, pull-up resistance r is inserted into power source V, and switches SϕWS3 are inserted into the earth respectively. The variation of the level caused by the switch operation is detected via MC. Pulse train (a) is delivered in a fixed period from output terminal OUT1, and voltage (b) is produced at the emitter of transistor Tr1 via integrating circuit RC and in accordance with the duty ratio of pulse train (a). And audible frequency signal (c) delivered from terminal OUT undergoes the amplitude modulation so as to feature the envelope which is expressed by the duty ratio and is then turns to signal (d). If the duty ratio is varied vased on the preset order between the frequency of signal (c) and pulse train (a), various kinds of tones can be produced. Diode D and resistance r2 are provided for the protection purpose.
COPYRIGHT: (C)1979,JPO&Japio
JP2139178A 1978-02-24 1978-02-24 electronic chime Expired JPS5911119B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2139178A JPS5911119B2 (en) 1978-02-24 1978-02-24 electronic chime

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2139178A JPS5911119B2 (en) 1978-02-24 1978-02-24 electronic chime

Publications (2)

Publication Number Publication Date
JPS54114099A true JPS54114099A (en) 1979-09-05
JPS5911119B2 JPS5911119B2 (en) 1984-03-13

Family

ID=12053756

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2139178A Expired JPS5911119B2 (en) 1978-02-24 1978-02-24 electronic chime

Country Status (1)

Country Link
JP (1) JPS5911119B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375061A (en) * 1980-12-29 1983-02-22 Mattel, Inc. Digitally driven audio effects generator
DE3443568A1 (en) * 1983-11-29 1985-06-05 Hess, Petra, 6000 Frankfurt Apparatus for scaring animal pests by means of ultrasound signals
KR20020085947A (en) * 2001-05-10 2002-11-18 씨멘스 오토모티브 주식회사 A reducing circuit of switching current in car

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118525A (en) * 1984-11-14 1986-06-05 Kawasaki Heavy Ind Ltd Exhaust device in two cycle engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375061A (en) * 1980-12-29 1983-02-22 Mattel, Inc. Digitally driven audio effects generator
DE3443568A1 (en) * 1983-11-29 1985-06-05 Hess, Petra, 6000 Frankfurt Apparatus for scaring animal pests by means of ultrasound signals
KR20020085947A (en) * 2001-05-10 2002-11-18 씨멘스 오토모티브 주식회사 A reducing circuit of switching current in car

Also Published As

Publication number Publication date
JPS5911119B2 (en) 1984-03-13

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