IT1153654B - Electronic door chime type circuit - Google Patents
Electronic door chime type circuitInfo
- Publication number
- IT1153654B IT1153654B IT24358/82A IT2435882A IT1153654B IT 1153654 B IT1153654 B IT 1153654B IT 24358/82 A IT24358/82 A IT 24358/82A IT 2435882 A IT2435882 A IT 2435882A IT 1153654 B IT1153654 B IT 1153654B
- Authority
- IT
- Italy
- Prior art keywords
- circuit
- supply
- chime
- type circuit
- electronic door
- Prior art date
Links
Abstract
Electronic multiple chime doorbell equipment comprises a power supply with pulse start for the chime sequence and a l.f. amplifier with loudspeaker audio output. The bell push is connected (1,2) to a voltage doubling circuit (3 to 5) which charges high capacity storage capacitors (4,5) to a voltage above the circuit supply level. The supply for this higher charge comes from the main day battery or mains l.v. power pack (13) via a power transistor (6). The extra voltage supplies the pulse start to the chime integrated circuit (12) for it to supply a loudspeaker (15) circuit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3146157 | 1981-11-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
IT8224358A0 IT8224358A0 (en) | 1982-11-22 |
IT8224358A1 IT8224358A1 (en) | 1984-05-22 |
IT1153654B true IT1153654B (en) | 1987-01-14 |
Family
ID=6146869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT24358/82A IT1153654B (en) | 1981-11-21 | 1982-11-22 | Electronic door chime type circuit |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1153654B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2208085A1 (en) * | 2002-06-27 | 2004-06-01 | Manuel Lopez Macias | Electronic ringer for doors of houses, has base body or casing with printed circuit board, where all electronic components are assembled, and connects with switch button and power supply |
-
1982
- 1982-11-22 IT IT24358/82A patent/IT1153654B/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2208085A1 (en) * | 2002-06-27 | 2004-06-01 | Manuel Lopez Macias | Electronic ringer for doors of houses, has base body or casing with printed circuit board, where all electronic components are assembled, and connects with switch button and power supply |
Also Published As
Publication number | Publication date |
---|---|
IT8224358A1 (en) | 1984-05-22 |
IT8224358A0 (en) | 1982-11-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY109821A (en) | Compact and efficient transformerless power conversion system | |
AU8796091A (en) | An electronic device forming a programmable miniature hearing aid, in particular of the intraductal type | |
FR2485309B1 (en) | BATTERY SUPPLY CIRCUIT FOR TELEPHONE LINE | |
CA2156542A1 (en) | Active Discharge Circuit for Charged Capacitors | |
TW344074B (en) | Charge transfer sense amplifier | |
EP0534274A3 (en) | Teaching system for electronics and electrical engineering | |
EP0123831A3 (en) | On chip charge trap compensated high voltage converter | |
EP0632456A3 (en) | Voltage generator circuit generating stable negative potential. | |
KR900001818B1 (en) | Booster circuit | |
GB2183964B (en) | Telephone power supply | |
IT1153654B (en) | Electronic door chime type circuit | |
IT1224644B (en) | CIRCUIT FOR MAINTAINING A MOS TRANSISTOR IN CONDUCT WITHOUT POWER SUPPLY VOLTAGE. | |
GB915314A (en) | Improvements in or relating to electric waveform generators | |
CA2076323A1 (en) | Call signal generating circuit | |
JPS5711466A (en) | Dc/dc converter built-in battery system | |
DE59304575D1 (en) | Lead battery charging circuit | |
ES8503463A1 (en) | Portable electronic video recording system. | |
IT8247862A0 (en) | ELECTRONIC VOLTAGE REGULATOR FOR CHARGING BATTERIES | |
JPS5680965A (en) | Synchronizing signal separating circuit | |
DE59909559D1 (en) | Electronic transformer | |
GB9303485D0 (en) | Different voltage output/input double parallel circuit of a battery set | |
JPS5732108A (en) | Amplifying circuit | |
EP0309922A3 (en) | Circuit for briefly boosting a regulated power voltage when switching on or in case of a drop in voltage | |
JPS57107679A (en) | Television receiver with electronic clock | |
IT8333507V0 (en) | ELECTRONIC VOLTAGE REGULATOR PARTICULARLY FOR THE RECHARGE OF ACCUMULATOR AND / OR BATTERIES |