CN201601858U - Power supply wiring board indicator connecting circuit - Google Patents
Power supply wiring board indicator connecting circuit Download PDFInfo
- Publication number
- CN201601858U CN201601858U CN2009202618450U CN200920261845U CN201601858U CN 201601858 U CN201601858 U CN 201601858U CN 2009202618450 U CN2009202618450 U CN 2009202618450U CN 200920261845 U CN200920261845 U CN 200920261845U CN 201601858 U CN201601858 U CN 201601858U
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- Prior art keywords
- indicator light
- power
- circuit
- connecting circuit
- patch panel
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- Expired - Fee Related
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- 239000002184 metal Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model provides a power supply wiring board indicator connecting circuit which comprises a LED indicator and an AC/DC conversion circuit; the AC end of the AC/DC conversion circuit is directly connected with the mains supply and the DC end thereof is connected with both ends of the indicator. The utility model is characterized in that the AC/DC circuit with high energy efficiency conversion rate is adopted to supply power for the LED indicator, and the method in prior art that an AC power supply is directly connected with a power resistor in series to supply power for the LED indicator in current-limiting mode is replaced, so as to realizes low energy consumption and long service life of the LED indicator.
Description
Technical field
The utility model relates to the circuit field of indicator light in the electronic circuit, particularly a kind of power patch panel indicator light connecting circuit.
Background technology
The indicator light of an indicator cock state generally can be set on the present power patch panel, and when the switch opens of terminal block, when jack had electricity, lamp was bright.This indicator light generally is a light-emitting diode (LED).Circuit connecting method is: with LED be connected between live wire and the zero line after the power resistor of an about 100K Ω is connected, the effect of power resistor is to the LED current limliting, but because the resistance both end voltage is near input ac voltage, the energy of its consumption is nearly 100 times of LED itself power consumption, and the utilance of power supply is very low.And the power resistor heating, cause the plastic casing accelerated ageing of terminal block easily, influence useful life.In addition, if work long hours, this power resistor is burnt out easily causes lamp not work, and loses the effect of indicator cock state.
Summary of the invention
Unfavorable for what the divider resistance that overcomes power patch panel indicator light connecting circuit in the prior art consumed energy, heating brings, the utility model provides a kind of power patch panel indicator light connecting circuit.
The utility model in order to realize the technical scheme that its technical purpose adopts is: a kind of power patch panel indicator light connecting circuit, comprise indicator light, an AC-DC change-over circuit, the AC end of described AC-DC change-over circuit directly connects civil power, the described indicator light of its DC termination two ends.
Further, in the above-mentioned power patch panel indicator light connecting circuit: comprise that also a current-limiting resistance is connected between described indicator light and AC-DC change-over circuit output and the LED, the rated power of described current-limiting resistance is 0.25W.
Further, in the above-mentioned power patch panel indicator light connecting circuit: the direct current output of described AC-DC change-over circuit is between 3V to 5V.
Further, in the above-mentioned power patch panel indicator light connecting circuit: described indicator light is LED.
Innovation of the present utility model is to use the AC-DC circuit of high energy efficiency transfer ratio to give indicator light LED power supply, and the alternating current of replace old is directly connected the power resistor current limliting to the method for LED power supply, low energy consumption, the long-life that can realize LED light.
Below in conjunction with the drawings and specific embodiments the utility model is done comparatively detailed description.
Description of drawings
Accompanying drawing 1 is the utility model embodiment 1 power patch panel indicator light connecting circuit schematic diagram.
Embodiment
Embodiment 1, as accompanying drawing 1: a kind of power patch panel indicator light connecting circuit is arranged on the power supply, in parallel with other socket, when connecting civil power, indicator light is bright, and expression has electricity, and this power patch panel indicator light connecting circuit comprises indicator light and an AC-DC change-over circuit, the AC end of AC-DC change-over circuit directly connects civil power, its DC termination indicator light two ends.In this circuit, indicator light is LED, the AC-DC change-over circuit converts the DC converting circuit of voltage between the 3V to 5V (Vcc) to for the civil power that 220V is exchanged, in order to guarantee the work of LED lamp, in circuit, also the contact resistance of a smaller power, resistance that rated power is 0.25W of polyphone in this circuit, the resistance of this resistance should be come corresponding configuration according to the AC-DC output voltage values, and making the electric current that flows through this resistance and indicator light is about 1mA.According to the actual conditions of present embodiment, when this resistance is output as 3V at the AC-DC circuit, current-limiting resistance be 300 ohm proper, if the AC-DC circuit is when being output as 3V, then current-limiting resistance be 500 ohm proper.But for LED, the electric current of requirement is not that special requirement are accurate, therefore, and the metal oxidation resistance in current-limiting resistance is selected 1000 ohm in the present embodiment.
The AC-DC circuit theory is with common Switching Power Supply in the present embodiment, and its topological structure comprises that mainly elementary rectification circuit, switching power source control circuit, switch transformer and secondary commutation circuit constitute.Be characterized in: input power equals power output divided by conversion efficiency.Its conversion efficiency is generally about 80%.
Present embodiment adopt merit the AC-DC module of rate conversion be terminal block indicator light LED power supply, himself power consumption is less than 0.5 times of LED, the method of the old relatively straight series limiting resistor of electric main, can improve the utilance of power supply greatly, and more safe and reliable, the life-span of prolongation LED lamp.In the today of advocating energy-conserving and environment-protective, it is more meaningful that the utility model seems.
Claims (5)
1. a power patch panel indicator light connecting circuit comprises indicator light, it is characterized in that: also comprise an AC-DC change-over circuit, the AC end of described AC-DC change-over circuit directly connects civil power, the described indicator light of its DC termination two ends.
2. power patch panel indicator light connecting circuit according to claim 1 is characterized in that: the direct voltage output of described AC-DC change-over circuit is between 3V to 5V.
3. power patch panel indicator light connecting circuit according to claim 1, it is characterized in that: comprise that also a current-limiting resistance is connected between described indicator light and AC-DC change-over circuit output and the indicator light, the rated power of described current-limiting resistance is 0.25W, and the electric current by wherein is 1mA.
4. power patch panel indicator light connecting circuit according to claim 3 is characterized in that: described current-limiting resistance is a metal oxidation resistance.
5. according to arbitrary described power patch panel indicator light connecting circuit in the claim 1 to 4, it is characterized in that: described indicator light is LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202618450U CN201601858U (en) | 2009-12-22 | 2009-12-22 | Power supply wiring board indicator connecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202618450U CN201601858U (en) | 2009-12-22 | 2009-12-22 | Power supply wiring board indicator connecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201601858U true CN201601858U (en) | 2010-10-06 |
Family
ID=42812914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202618450U Expired - Fee Related CN201601858U (en) | 2009-12-22 | 2009-12-22 | Power supply wiring board indicator connecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201601858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749534A (en) * | 2015-04-16 | 2015-07-01 | 顺德职业技术学院 | LED lamp tester based on PLC control system |
-
2009
- 2009-12-22 CN CN2009202618450U patent/CN201601858U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749534A (en) * | 2015-04-16 | 2015-07-01 | 顺德职业技术学院 | LED lamp tester based on PLC control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20121222 |