JPS6262549U - - Google Patents
Info
- Publication number
- JPS6262549U JPS6262549U JP15554885U JP15554885U JPS6262549U JP S6262549 U JPS6262549 U JP S6262549U JP 15554885 U JP15554885 U JP 15554885U JP 15554885 U JP15554885 U JP 15554885U JP S6262549 U JPS6262549 U JP S6262549U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- transistor
- turned
- resistor
- power supply
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例に係るランプ断線検
出回路の回路図。第２図は第１図の各部の電圧値
の変化を示す波形図。第３図は、ランプの点灯後
の抵抗の変化を示すグラフ。
２……ランプ、４……抵抗、６……点灯スイツ
チ、８……電源、１２……ＰＮＰトランジスタ、
１８，２６……ＮＰＮトランジスタ、２０……断
線報知用ランプ。
FIG. 1 is a circuit diagram of a lamp burnout detection circuit according to an embodiment of the present invention. FIG. 2 is a waveform diagram showing changes in voltage values at various parts in FIG. 1. FIG. 3 is a graph showing the change in resistance after lighting the lamp. 2... Lamp, 4... Resistor, 6... Lighting switch, 8... Power supply, 12... PNP transistor,
18, 26... NPN transistor, 20... disconnection alarm lamp.
Claims (1)
と、前記ランプと抵抗との直列回路に点灯スイツ
チを介して接続された電源と、前記ランプと抵抗
の接続点に制御端が接続され前記ランプの点灯直
後の抵抗値と前記抵抗の抵抗値との分圧比によつ
てオンされる第１のトランジスタと、前記トラン
ジスタがオンすることによつて点灯する断線報知
用ランプと、前記第１のトランジスタの制御入力
端にと電源との間に並列に接続され、前記第１の
トランジスタがオンされると同時にオンする第２
のトランジスヨと、から成るランプ断線検出回路
。 A lamp, a resistor connected in series with the lamp, a power supply connected to the series circuit of the lamp and the resistor via a lighting switch, and a control end connected to the connection point between the lamp and the resistor, and a control end of the lamp. a first transistor that is turned on based on a voltage division ratio between a resistance value immediately after lighting and a resistance value of the resistor; a disconnection notification lamp that is turned on when the transistor is turned on; a second transistor connected in parallel between the control input terminal and the power supply and turned on at the same time as the first transistor is turned on;
A lamp breakage detection circuit consisting of a transistor and a transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15554885U JPS6262549U (en) | 1985-10-09 | 1985-10-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15554885U JPS6262549U (en) | 1985-10-09 | 1985-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6262549U true JPS6262549U (en) | 1987-04-18 |
Family
ID=31076353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15554885U Pending JPS6262549U (en) | 1985-10-09 | 1985-10-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6262549U (en) |
-
1985
- 1985-10-09 JP JP15554885U patent/JPS6262549U/ja active Pending