JPS54100721A - Electric circuit for camera - Google Patents
Electric circuit for cameraInfo
- Publication number
- JPS54100721A JPS54100721A JP755478A JP755478A JPS54100721A JP S54100721 A JPS54100721 A JP S54100721A JP 755478 A JP755478 A JP 755478A JP 755478 A JP755478 A JP 755478A JP S54100721 A JPS54100721 A JP S54100721A
- Authority
- JP
- Japan
- Prior art keywords
- points
- led
- scr
- point
- resistor
- 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
Links
Abstract
PURPOSE: To prevent an erroneous display and the idle trip of a shutter by holding the condition of a warning mode with the use of a switching element having a holding function.
CONSTITUTION: In a timer circuit, a point B is connected through a resistor R1 with a point E, and a variable resistor VR1 is connected between the points A and E. The main terminal of a comparator COMP is connected with the points A and E. Moreover, a deflection warning light emitting diode LED is connected between the points A and E through a resistor R2, and an SCR is connected in parallel with the LED. Still moreover, the gate of the SCR is connected with the point B, and a switch SW1 has its contact 1 connected with the negative terminal of a DC power source EB and its other contacts 2 and 3 connected with the points E and B, respectively. Since the display of the LED is held by the SCR of such circuit, the erroneous display of the LED can be eliminated, and the idle trip of shutter can also be eliminated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP755478A JPS54100721A (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 |
---|---|---|---|
JP755478A JPS54100721A (en) | 1978-01-25 | 1978-01-25 | Electric circuit for camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54100721A true JPS54100721A (en) | 1979-08-08 |
Family
ID=11669009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP755478A Pending JPS54100721A (en) | 1978-01-25 | 1978-01-25 | Electric circuit for camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54100721A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133027A (en) * | 1973-03-20 | 1974-12-20 |
-
1978
- 1978-01-25 JP JP755478A patent/JPS54100721A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49133027A (en) * | 1973-03-20 | 1974-12-20 |
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