CN210274609U - Photosensitive lighting blackboard lamp circuit - Google Patents
Photosensitive lighting blackboard lamp circuit Download PDFInfo
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- CN210274609U CN210274609U CN201921087229.8U CN201921087229U CN210274609U CN 210274609 U CN210274609 U CN 210274609U CN 201921087229 U CN201921087229 U CN 201921087229U CN 210274609 U CN210274609 U CN 210274609U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 70
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 18
- 206010070834 Sensitisation Diseases 0.000 abstract description 9
- 230000008313 sensitization Effects 0.000 abstract description 9
- 230000036541 health Effects 0.000 abstract description 4
- 230000004438 eyesight Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000013016 learning Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004382 visual function Effects 0.000 description 1
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Abstract
The utility model discloses a photosensitive lighting blackboard lamp circuit, which comprises a power supply conversion unit and a photosensitive regulation unit; the output end of the power supply conversion unit is connected with the input end of the photosensitive regulating unit; the power supply conversion unit is rectified through a rectifier bridge BR1, a triode Q1 amplifies current, and a transformer TR1 changes voltage; the photosensitive regulating unit enables the circuit to obtain more stable voltage through a parallel voltage-stabilizing integrated circuit U2, and an operational amplifier U1: A. operational amplifier U1: a constitutes an amplifying circuit, the signal is amplified, and the light-sensitive resistor LDR1 changes the resistance according to the illumination, so that the voltage output is controlled. The utility model relates to a sensitization illumination blackboard lamp circuit can use when the blackboard illumination, through operational amplifier U1: A. operational amplifier U1: a amplifies the voltage signal, makes the voltage become stable through voltage regulator integrated circuit U2, comes the sensitization through photo resistance LDR1 and adjusts, makes the blackboard lamp adjust luminance according to illumination, has guaranteed student and mr's health, and it is more convenient to adjust.
Description
Technical Field
The utility model relates to a blackboard lamp field particularly, relates to a sensitization illumination blackboard lamp circuit, can use when the blackboard illumination, through operational amplifier U1: A. operational amplifier U1: a amplifies the voltage signal, makes the voltage become stable through voltage regulator integrated circuit U2, comes the sensitization through photo resistance LDR1 and adjusts, makes the blackboard lamp adjust luminance according to illumination, has guaranteed student and mr's health, and it is more convenient to adjust.
Background
At present, the education lighting environment of a great part of schools cannot meet the national standard, the insufficient blackboard illumination is particularly serious, and the learning efficiency and the eyesight of students are indirectly influenced. For classroom lighting equipment, the standard of education lighting has certain difficulty, so that blackboard lamps are produced at the same time.
Generally adopt the mode that changes the light source among the prior art to guarantee that student and mr's eyesight is not influenced, use the LED light source, guarantee that the light source does not have the stroboscopic, does not have the blue light, reduces the light curtain reflection, protects eyesight, improves visual function and visibility level.
But the brightness can not be adjusted according to natural illumination, and a comfortable illumination light environment can not be created in real time.
SUMMERY OF THE UTILITY MODEL
To the problem among the correlation technique, the utility model provides a sensitization illumination blackboard lamp circuit to overcome the above-mentioned technical problem that current correlation technique exists.
The technical scheme of the utility model is realized like this:
a photosensitive lighting blackboard lamp circuit comprises a power supply conversion unit and a photosensitive adjusting unit;
the output end of the power supply conversion unit is connected with the input end of the photosensitive regulating unit;
the power conversion unit comprises a rectifier bridge BR1, a transformer TR1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3 and a triode Q1;
a 2 nd pin of the rectifier bridge BR1 is connected to an input voltage, a 3 rd pin of the rectifier bridge BR1 is connected to the input voltage, a 1 st pin of the rectifier bridge BR1 is connected to one end of the resistor R2, a 4 th pin of the rectifier bridge BR1 is connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C2, one end of the resistor R3 and a 3 rd pin of the transformer TR1, respectively, the other end of the capacitor C1 is connected to ground, the other end of the resistor R1 is connected to one end of the capacitor C3 and a base of the transistor Q1, the other end of the capacitor C3 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to a 1 st pin of the transformer TR1, a 2 nd pin of the transformer TR1 is connected to ground, and the other end of the capacitor C2 is connected to the other end of the resistor R3 and a cathode of the diode D1, a 4 th pin of the transformer TR1 is connected to the anode of the diode D1 and the collector of the transistor Q1, respectively, an emitter of the transistor Q1 is connected to the other end of the resistor R2, a 5 th pin of the transformer TR1 is connected to the anode of the diode D2, a 6 th pin of the transformer TR1 is connected to the anode of the diode D3, a cathode of the diode D2 is connected to one end of the capacitor C4, and a cathode of the diode D3 is grounded to the other end of the capacitor C4;
a photosensitive conditioning unit comprising an operational amplifier U1: A. operational amplifier U1: B. the circuit comprises a voltage stabilizing integrated circuit U2, a photosensitive resistor LDR1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a potentiometer RV1, a capacitor C5, a capacitor C6, a capacitor C7, a MOS transistor Q2, a triode Q3, a diode D4 and an inductor L1;
one end of the resistor R5 is connected to one end of the capacitor C5, one end of the resistor R12, the collector of the transistor Q3, the cathode of the diode D2, and one end of the capacitor C4, the other end of the capacitor C5 is grounded, and the other end of the resistor R5 is connected to the 3 rd pin of the regulator ic U2, the 1 st pin of the regulator ic U2, and the operational amplifier U1: the non-inverting input end of A is connected, the 2 nd pin of the voltage stabilizing integrated circuit U2 is grounded, and the operational amplifier U1: the inverting input ends of A are respectively connected with the operational amplifier U1: the output end of a, one end of the capacitor C6 and one end of the resistor R6 are connected, the other end of the capacitor C6 is grounded, the other end of the resistor R6 is connected with the 1 st pin of the potentiometer RV1, the 2 nd pin of the potentiometer RV1 is connected with one end of the photosensitive resistor LDR1, the 3 rd pin of the potentiometer RV1 is connected with one end of the resistor R7, and the other end of the resistor R7 is respectively connected with one end of the resistor R8 and one end of the operational amplifier U1: b, the non-inverting input terminal of the operational amplifier U1: the inverting input end of the resistor B is respectively connected with one end of the capacitor C7 and one end of the resistor R10, the other end of the resistor R10 and one end of the resistor R13 are both connected with an output voltage, and one end of the resistor R8 is respectively connected with the operational amplifier U1: the output end of B, one end of resistance R9 is connected, the other end of resistance R9 with MOS pipe Q2's grid is connected, the source and the other end of photo resistor LDR1 of MOS pipe Q2, the other end of electric capacity C7 and the other end of resistance R13 all ground connection, the drain-source resistance of MOS pipe Q2 with one end of resistance R11 is connected, the other end of resistance R11 with the other end of resistance R12, the base of triode Q3 is connected, the projecting pole of triode Q3 respectively with diode D4's negative pole, the one end of inductance L1 is connected, the other end of inductance L1 connects output voltage.
Further, the transformer TR1 is a 6-pin transformer, and is capable of changing a power supply voltage.
Further, the operational amplifier U1: A. the operational amplifier U1: and B are operational amplifiers LM358 which can form an amplifying circuit and amplify the voltage signals.
Further, the regulator integrated circuit U2 is a parallel regulator integrated circuit TL431 capable of providing a reference voltage.
Further, the potentiometer RV1 is a linear potentiometer and can be zeroed.
Further, the MOS transistor Q2 is an MOS transistor IRFR9014, and is capable of amplifying a voltage signal.
The utility model has the advantages that: can be used in blackboard illumination, and is characterized in that the operation amplifier U1: A. operational amplifier U1: a amplifies the voltage signal, makes the voltage become stable through voltage regulator integrated circuit U2, comes the sensitization through photo resistance LDR1 and adjusts, makes the blackboard lamp adjust luminance according to illumination, has guaranteed student and mr's health, and it is more convenient to adjust.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of a photosensitive illuminating blackboard lamp according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
According to the utility model discloses an embodiment provides a sensitization illumination blackboard lamp circuit.
As shown in fig. 1, the photosensitive lighting blackboard lamp circuit according to the embodiment of the present invention includes a power conversion unit and a photosensitive adjustment unit;
the output end of the power supply conversion unit is connected with the input end of the photosensitive regulating unit;
the power conversion unit comprises a rectifier bridge BR1, a transformer TR1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3 and a triode Q1;
a 2 nd pin of the rectifier bridge BR1 is connected to an input voltage, a 3 rd pin of the rectifier bridge BR1 is connected to the input voltage, a 1 st pin of the rectifier bridge BR1 is connected to one end of the resistor R2, a 4 th pin of the rectifier bridge BR1 is connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C2, one end of the resistor R3 and a 3 rd pin of the transformer TR1, respectively, the other end of the capacitor C1 is connected to ground, the other end of the resistor R1 is connected to one end of the capacitor C3 and a base of the transistor Q1, the other end of the capacitor C3 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to a 1 st pin of the transformer TR1, a 2 nd pin of the transformer TR1 is connected to ground, and the other end of the capacitor C2 is connected to the other end of the resistor R3 and a cathode of the diode D1, a 4 th pin of the transformer TR1 is connected to the anode of the diode D1 and the collector of the transistor Q1, respectively, an emitter of the transistor Q1 is connected to the other end of the resistor R2, a 5 th pin of the transformer TR1 is connected to the anode of the diode D2, a 6 th pin of the transformer TR1 is connected to the anode of the diode D3, a cathode of the diode D2 is connected to one end of the capacitor C4, and a cathode of the diode D3 is grounded to the other end of the capacitor C4;
a photosensitive conditioning unit comprising an operational amplifier U1: A. operational amplifier U1: B. the circuit comprises a voltage stabilizing integrated circuit U2, a photosensitive resistor LDR1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a potentiometer RV1, a capacitor C5, a capacitor C6, a capacitor C7, a MOS transistor Q2, a triode Q3, a diode D4 and an inductor L1;
one end of the resistor R5 is connected to one end of the capacitor C5, one end of the resistor R12, the collector of the transistor Q3, the cathode of the diode D2, and one end of the capacitor C4, the other end of the capacitor C5 is grounded, and the other end of the resistor R5 is connected to the 3 rd pin of the regulator ic U2, the 1 st pin of the regulator ic U2, and the operational amplifier U1: the non-inverting input end of A is connected, the 2 nd pin of the voltage stabilizing integrated circuit U2 is grounded, and the operational amplifier U1: the inverting input ends of A are respectively connected with the operational amplifier U1: the output end of a, one end of the capacitor C6 and one end of the resistor R6 are connected, the other end of the capacitor C6 is grounded, the other end of the resistor R6 is connected with the 1 st pin of the potentiometer RV1, the 2 nd pin of the potentiometer RV1 is connected with one end of the photosensitive resistor LDR1, the 3 rd pin of the potentiometer RV1 is connected with one end of the resistor R7, and the other end of the resistor R7 is respectively connected with one end of the resistor R8 and one end of the operational amplifier U1: b, the non-inverting input terminal of the operational amplifier U1: the inverting input end of the resistor B is respectively connected with one end of the capacitor C7 and one end of the resistor R10, the other end of the resistor R10 and one end of the resistor R13 are both connected with an output voltage, and one end of the resistor R8 is respectively connected with the operational amplifier U1: the output end of B, one end of resistance R9 is connected, the other end of resistance R9 with MOS pipe Q2's grid is connected, the source and the other end of photo resistor LDR1 of MOS pipe Q2, the other end of electric capacity C7 and the other end of resistance R13 all ground connection, the drain-source resistance of MOS pipe Q2 with one end of resistance R11 is connected, the other end of resistance R11 with the other end of resistance R12, the base of triode Q3 is connected, the projecting pole of triode Q3 respectively with diode D4's negative pole, the one end of inductance L1 is connected, the other end of inductance L1 connects output voltage.
In one embodiment, the transistor Q1 constitutes an amplifying circuit that amplifies the input voltage.
In one embodiment, the transformer TR1 is a 6-pin transformer that can vary the supply voltage to meet output requirements.
In one embodiment, the operational amplifier U1: A. the operational amplifier U1: b are operational amplifiers LM358, which can constitute an amplifying circuit, which amplifies voltage signals, the operational amplifiers U1: a, the output voltage is determined by comparing with a reference voltage provided by the voltage stabilizing integrated circuit U2, and the operational amplifier U1: b comparing the operational amplifier U1: the output voltage of a is equal to the voltage provided by the light dependent resistor LDR 1.
In one embodiment, the regulator integrated circuit U2 is a parallel regulator integrated circuit TL431 capable of providing a reference voltage to be compared with the input voltage changed by the transformer TR 1.
In one embodiment, the potentiometer RV1 is a linear potentiometer capable of being adjusted to zero to control the voltage provided by the light-sensitive resistor LDR1, thereby controlling the adjustment of the brightness.
In one embodiment, the MOS transistor Q2 is an MOS transistor IRFR9014, and can amplify a voltage signal together with the transistor Q3, so as to ensure accuracy of photosensitive control.
The working principle is as follows: a rectifier bridge BR1, a transformer TR1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3 and a triode Q1 form a power conversion unit; the rectifier bridge BR1 is used for rectifying the input voltage; the triode Q1 is used for forming an amplifying circuit and amplifying input voltage; the transformer TR1 is used for changing the power supply voltage to meet the output requirement; the diode D1 and the voltage stabilizing diode D2 are used for stabilizing the voltage changed by the transformer TR 1.
Operational amplifier U1: A. operational amplifier U1: B. a photosensitive adjusting unit consists of a voltage stabilizing integrated circuit U2, a photosensitive resistor LDR1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a potentiometer RV1, a capacitor C5, a capacitor C6, a capacitor C7, a MOS transistor Q2, a triode Q3, a diode D4 and an inductor L1; the operational amplifier U1: A. the operational amplifier U1: b is used for forming an amplifying circuit and amplifying the voltage signal; the function of the voltage stabilizing integrated circuit U2 is to provide a reference voltage to be compared with the input voltage changed by the transformer TR 1; the potentiometer RV1 is used for zeroing and controlling the voltage provided by the light-sensitive resistor LDR1 so as to control the adjustment of brightness; the light dependent resistor LDR1 is used for changing self resistance by light sensing, so that the self brightness of the blackboard lamp is changed along with illumination; the MOS tube Q2 and the triode Q3 are used for amplifying voltage signals together, and the accuracy of photosensitive control is guaranteed.
To sum up, with the help of the utility model discloses an above-mentioned technical scheme, through designing a sensitization illumination blackboard lamp circuit, can use when the blackboard illumination, through operational amplifier U1: A. operational amplifier U1: a amplifies the voltage signal, makes the voltage become stable through voltage regulator integrated circuit U2, comes the sensitization through photo resistance LDR1 and adjusts, makes the blackboard lamp adjust luminance according to illumination, has guaranteed student and mr's health, and it is more convenient to adjust.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A photosensitive lighting blackboard lamp circuit is characterized by comprising a power supply conversion unit and a photosensitive adjusting unit;
the output end of the power supply conversion unit is connected with the input end of the photosensitive regulating unit;
the power conversion unit comprises a rectifier bridge BR1, a transformer TR1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a diode D1, a diode D2, a diode D3 and a triode Q1;
a 2 nd pin of the rectifier bridge BR1 is connected to an input voltage, a 3 rd pin of the rectifier bridge BR1 is connected to the input voltage, a 1 st pin of the rectifier bridge BR1 is connected to one end of the resistor R2, a 4 th pin of the rectifier bridge BR1 is connected to one end of the capacitor C1, one end of the resistor R1, one end of the capacitor C2, one end of the resistor R3 and a 3 rd pin of the transformer TR1, respectively, the other end of the capacitor C1 is connected to ground, the other end of the resistor R1 is connected to one end of the capacitor C3 and a base of the transistor Q1, the other end of the capacitor C3 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to a 1 st pin of the transformer TR1, a 2 nd pin of the transformer TR1 is connected to ground, and the other end of the capacitor C2 is connected to the other end of the resistor R3 and a cathode of the diode D1, a 4 th pin of the transformer TR1 is connected to the anode of the diode D1 and the collector of the transistor Q1, respectively, an emitter of the transistor Q1 is connected to the other end of the resistor R2, a 5 th pin of the transformer TR1 is connected to the anode of the diode D2, a 6 th pin of the transformer TR1 is connected to the anode of the diode D3, a cathode of the diode D2 is connected to one end of the capacitor C4, and a cathode of the diode D3 is grounded to the other end of the capacitor C4;
a photosensitive conditioning unit comprising an operational amplifier U1: A. operational amplifier U1: B. the circuit comprises a voltage stabilizing integrated circuit U2, a photosensitive resistor LDR1, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a potentiometer RV1, a capacitor C5, a capacitor C6, a capacitor C7, a MOS transistor Q2, a triode Q3, a diode D4 and an inductor L1;
one end of the resistor R5 is connected to one end of the capacitor C5, one end of the resistor R12, the collector of the transistor Q3, the cathode of the diode D2, and one end of the capacitor C4, the other end of the capacitor C5 is grounded, and the other end of the resistor R5 is connected to the 3 rd pin of the regulator ic U2, the 1 st pin of the regulator ic U2, and the operational amplifier U1: the non-inverting input end of A is connected, the 2 nd pin of the voltage stabilizing integrated circuit U2 is grounded, and the operational amplifier U1: the inverting input ends of A are respectively connected with the operational amplifier U1: the output end of a, one end of the capacitor C6 and one end of the resistor R6 are connected, the other end of the capacitor C6 is grounded, the other end of the resistor R6 is connected with the 1 st pin of the potentiometer RV1, the 2 nd pin of the potentiometer RV1 is connected with one end of the photosensitive resistor LDR1, the 3 rd pin of the potentiometer RV1 is connected with one end of the resistor R7, and the other end of the resistor R7 is respectively connected with one end of the resistor R8 and one end of the operational amplifier U1: b, the non-inverting input terminal of the operational amplifier U1: the inverting input end of the resistor B is respectively connected with one end of the capacitor C7 and one end of the resistor R10, the other end of the resistor R10 and one end of the resistor R13 are both connected with an output voltage, and one end of the resistor R8 is respectively connected with the operational amplifier U1: the output end of B, one end of resistance R9 is connected, the other end of resistance R9 with MOS pipe Q2's grid is connected, the source and the other end of photo resistor LDR1 of MOS pipe Q2, the other end of electric capacity C7 and the other end of resistance R13 all ground connection, the drain-source resistance of MOS pipe Q2 with one end of resistance R11 is connected, the other end of resistance R11 with the other end of resistance R12, the base of triode Q3 is connected, the projecting pole of triode Q3 respectively with diode D4's negative pole, the one end of inductance L1 is connected, the other end of inductance L1 connects output voltage.
2. A light-sensitive illuminating blackboard lamp circuit according to claim 1, wherein the transformer TR1 is a 6-pin transformer.
3. A light-sensitive blackboard lamp circuit according to claim 1, wherein the operational amplifier U1: A. the operational amplifier U1: and B are operational amplifiers LM 358.
4. A light-sensitive illuminating blackboard lamp circuit according to claim 1, wherein the voltage-stabilizing integrated circuit U2 is a parallel voltage-stabilizing integrated circuit TL 431.
5. A photosensitive illuminating blackboard lamp circuit according to claim 1, wherein the potentiometer RV1 is a linear potentiometer.
6. A photosensitive illuminating blackboard lamp circuit according to claim 1, wherein the MOS transistor Q2 is a MOS transistor IRFR 9014.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921087229.8U CN210274609U (en) | 2019-07-12 | 2019-07-12 | Photosensitive lighting blackboard lamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921087229.8U CN210274609U (en) | 2019-07-12 | 2019-07-12 | Photosensitive lighting blackboard lamp circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210274609U true CN210274609U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921087229.8U Expired - Fee Related CN210274609U (en) | 2019-07-12 | 2019-07-12 | Photosensitive lighting blackboard lamp circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210274609U (en) |
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2019
- 2019-07-12 CN CN201921087229.8U patent/CN210274609U/en not_active Expired - Fee Related
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Granted publication date: 20200407 |