CN201804646U - Photoresistance potentiometer - Google Patents
Photoresistance potentiometer Download PDFInfo
- Publication number
- CN201804646U CN201804646U CN2010202144599U CN201020214459U CN201804646U CN 201804646 U CN201804646 U CN 201804646U CN 2010202144599 U CN2010202144599 U CN 2010202144599U CN 201020214459 U CN201020214459 U CN 201020214459U CN 201804646 U CN201804646 U CN 201804646U
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- CN
- China
- Prior art keywords
- potentiometer
- photoresistance
- emitting diode
- light
- resistance
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a photoresistance potentiometer, which comprises a photoresistor, a light emitting diode and an adjustable resistor. The light emitting diode is connected with the adjustable resistor in series and then connected with a DC power supply source. The output terminal of the photoresistor serves as the output terminal of the photoresistance potentiometer. By adjusting the brightness of a light source, the resistance value of the photoresistor is changed, and the function of the potentiometer is realized. The photoresistance potentiometer realizes that a regulating circuit is completely separated from a signal circuit, and achieves photoelectric isolation. The slow regulation of the light source can realize the fine control of the resistance value of the potentiometer. Noise does not occur during volume regulation, and the problem of signal disturb is effectively solved. The photoresistance potentiometer is abrasion-free and has a long service life.
Description
Technical field
The application relates to potentiometer, relates in particular to a kind of potentiometer that changes resistance according to light source.
Background technology
At present, generally adopt the film type carbon potentiometer to regulate volume in the various power amplifiers.This potentiometer be by sliding contact on resistive element the position move the size that changes resistance in the place in circuit.Its sliding contact is connected in series with input signal, is easy to generate noise when regulating volume, reduces tonequality.Fixed carbon resister body coating has wearing and tearing, poor durability.Photo resistance is that a kind of resistance changes the device change a little less than with light intensity.This specific character of device provides a kind of new approaches of photoresistance potentiometer.This new approaches are the functions that change the size realization potentiometer of photo resistance resistance by the adjusting light-source brightness.
Summary of the invention
A kind of by the strong and weak potentiometer that changes resistance that changes of illumination.Realized the photoelectricity isolation, efficiently solved signal interference problem, potentiometer is prolonged useful life greatly.
The technical scheme that the application adopts is: light-emitting diode and photo resistance are installed and its luminosity of series connection adjustable resistance realization even regulation in the current supply circuit of light-emitting diode in lighttight magazine.It comprises photo-resistor, light-emitting diode, adjustable resistance.Their annexation is: external dc power supply behind the light-emitting diode series connection adjustable resistance.The photo-resistor output is as the photoresistance potentiometer output.
Its operation principle is: the photo resistance resistance is thousands of ohm or tens kilohms when light along with the variation of intensity of illumination changes, and is the number megaohm when half-light.As light source, gently regulate the brightness of light-emitting diode by series connection adjustable resistance in its current supply circuit with light-emitting diode, the photo resistance resistance will very mild variation.Thereby realized the function of potentiometer power transformation resistance.
The application's good effect is: realized separating fully of regulating circuit and signal circuit, accomplished the photoelectricity isolation.The mild adjusting of light source can realize the meticulous control of potentiometer resistance.Be used for not having noise when volume is regulated, efficiently solve signal interference problem.There is not the wearing and tearing long service life.
Description of drawings
Fig. 1 is the application's circuit theory diagrams.
Among the figure: 1-magazine, 2-photo resistance, 3-light-emitting diode, 4-adjustable resistance.
Embodiment
As shown in Figure 1, in the lighttight magazine 1 of sealing, photo resistance 2 is installed, light-emitting diode 3.Light-emitting diode 3 luminous heads are over against photo resistance 2 sensitive surfaces (front).Light-emitting diode 3 is selected the highlighted White LED of transparent enclosure for use, with series connection adjustable resistance 4 in its current supply circuit, regulates the effect that adjustable resistance 4 reaches the brightness of adjusting light-emitting diode 3 that can be evenly mild.Those skilled in the art implements and can realize by circuit among Fig. 1.
Claims (1)
1. photoresistance potentiometer, it comprises photo-resistor, light-emitting diode, adjustable resistance, it is characterized in that, light-emitting diode and photo resistance are installed and its luminosity of adjustable resistance realization even regulation of connecting in the current supply circuit of light-emitting diode in lighttight magazine, the photo-resistor output is as the photoresistance potentiometer output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202144599U CN201804646U (en) | 2010-05-28 | 2010-05-28 | Photoresistance potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202144599U CN201804646U (en) | 2010-05-28 | 2010-05-28 | Photoresistance potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201804646U true CN201804646U (en) | 2011-04-20 |
Family
ID=43874148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202144599U Expired - Fee Related CN201804646U (en) | 2010-05-28 | 2010-05-28 | Photoresistance potentiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201804646U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645764A (en) * | 2013-12-18 | 2014-03-19 | 浙江师范大学 | Linear resistor isolation control circuit based on voltage regulation |
| CN105047412A (en) * | 2015-08-03 | 2015-11-11 | 河南科技大学 | Optical control variable capacitor |
| CN111048616A (en) * | 2019-12-16 | 2020-04-21 | 重庆邮电大学 | Variable resistor |
-
2010
- 2010-05-28 CN CN2010202144599U patent/CN201804646U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645764A (en) * | 2013-12-18 | 2014-03-19 | 浙江师范大学 | Linear resistor isolation control circuit based on voltage regulation |
| CN103645764B (en) * | 2013-12-18 | 2016-01-13 | 浙江师范大学 | A kind of linear resistor isolation control circuit based on voltage-regulation |
| CN105047412A (en) * | 2015-08-03 | 2015-11-11 | 河南科技大学 | Optical control variable capacitor |
| CN105047412B (en) * | 2015-08-03 | 2017-11-07 | 河南科技大学 | A kind of light-operated variable condenser |
| CN111048616A (en) * | 2019-12-16 | 2020-04-21 | 重庆邮电大学 | Variable resistor |
| CN111048616B (en) * | 2019-12-16 | 2021-06-18 | 重庆邮电大学 | Variable resistor |
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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: 20110420 Termination date: 20120528 |