JPS54100722A - Electric circuit for camera - Google Patents
Electric circuit for cameraInfo
- Publication number
- JPS54100722A JPS54100722A JP755578A JP755578A JPS54100722A JP S54100722 A JPS54100722 A JP S54100722A JP 755578 A JP755578 A JP 755578A JP 755578 A JP755578 A JP 755578A JP S54100722 A JPS54100722 A JP S54100722A
- Authority
- JP
- Japan
- Prior art keywords
- point
- resistor
- scr
- terminal
- points
- 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
Links
Abstract
PURPOSE: To prevent an erroneous display and the idle trip of a s-utter by providing both a switching element having a holding fuction and warning means to be controlled by said element.
CONSTITUTION: In a timer circuit, a point B is connected through a resistor R1 with a point E, and the main terminal of a comparator COMP is connected with points A and E. Moreover, a switch SW1 has two contacts 1 and 2, the former being connected with the negative terminal of a DC power source EB whereas the latter being connected with the point E. A variable resistor VR2 has its both terminals connected between the points A and E and its sliding terminal connected through a capacitor C2 with the inverted input terminal of the comparator. A deflection warning LED is connected through a resistor R2 between the points A and E. An SCR has its gate connected through a resistor R3 with the output terminal of the COMP. Still moreover, a capacitor C3 is connected between the gate of the SCR and the point E. Since, in that way, the condition of the warning mode is held by the SCR, it is possible to eliminate the erroneous display and the idle trip of the shutter.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP755578A JPS54100722A (en) | 1978-01-25 | 1978-01-25 | Electric circuit for camera |
US06/006,225 US4305648A (en) | 1978-01-25 | 1979-01-24 | Electric circuits for use in camera |
DE2942435A DE2942435C2 (en) | 1978-01-25 | 1979-01-25 | Electrical circuit for a camera |
DE2954054A DE2954054C2 (en) | 1978-01-25 | 1979-01-25 | Circuit for displaying insufficient light conditions in a camera |
DE2902891A DE2902891C2 (en) | 1978-01-25 | 1979-01-25 | Circuit for displaying insufficient light conditions in a camera |
US06/152,764 US4375912A (en) | 1978-01-25 | 1980-05-23 | Electric circuits for use in camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP755578A JPS54100722A (en) | 1978-01-25 | 1978-01-25 | Electric circuit for camera |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54100722A true JPS54100722A (en) | 1979-08-08 |
JPS6238690B2 JPS6238690B2 (en) | 1987-08-19 |
Family
ID=11669036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP755578A Granted JPS54100722A (en) | 1978-01-25 | 1978-01-25 | Electric circuit for camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54100722A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133027A (en) * | 1973-03-20 | 1974-12-20 |
-
1978
- 1978-01-25 JP JP755578A patent/JPS54100722A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133027A (en) * | 1973-03-20 | 1974-12-20 |
Also Published As
Publication number | Publication date |
---|---|
JPS6238690B2 (en) | 1987-08-19 |
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