CN204836674U - Light sense power saving circuit - Google Patents

Abstract

The utility model discloses a light sense power saving circuit, including chip U1, resistance R1, transformer T, rectifier bridge Q, triode VT1 and relay K. The utility model discloses light sense power saving circuit comes the cooperation through light sense automatic control and manual push button and carries out the control of classroom light, reaches when satisfying normal teaching and requiring in indoor natural light illuminance, and light is automatic to be gone out, and in overcast and rainy and evening, after room light illuminance dropped to the certain degree, lamps and lanterns are manual opening as required.

Description

A kind of light sensation power save circuit

Technical field

The utility model relates to a kind of power save circuit, specifically a kind of light sensation power save circuit.

Background technology

The illumination in current most schools classroom still adopts hand control switch, but often because people's saving consciousness is indifferent and negligence of management, even if when natural daylight is abundant, indoor light situation kept burning day and night is taught still to be seen everywhere, not only loss electric energy, decrease the useful life of light fixture simultaneously, shine into the wasting of resources; If unified management, due to Changes in weather etc. reason, can not can adjust in time again.

Utility model content

The purpose of this utility model is to provide a kind of light sensation power save circuit for classroom's light fixture, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technical scheme:

A kind of light sensation power save circuit, comprises chip U1, resistance R1, transformer T, rectifier bridge Q, triode VT1 and relay K, described transformer T primary coil two ends connect 220V alternating current, and transformer T secondary coil two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3, rectifier bridge Q pin 2 contact resistance R1 respectively respectively, photodiode D2 negative pole, chip U1 pin 4, chip U1 pin 8, triode VT2 emitter and electric capacity C1, the electric capacity C1 other end connects rectifier bridge Q pin 4 respectively, light-emitting diode D1 negative pole, resistance R3, electric capacity C2, chip U1 pin 1, resistance R5, triode VT1 emitter, key switch S2, electric capacity C3, triode VT3 emitter, relay K coil, diode D3 positive pole and light-emitting diode D4 negative pole, described resistance R1 other end connecting luminous diode D1 positive pole, photodiode D2 positive pole contact resistance R2, the resistance R2 other end is the contact resistance R3 other end respectively, chip U1 pin 2, chip U1 pin 6 and the electric capacity C2 other end, the chip U1 pin 5 contact resistance R5 other end, chip U1 pin 3 is by resistance R4 connecting triode VT1 base stage, and triode VT1 collector electrode is by resistance R7 connecting triode VT2 base stage, and triode VT2 collector electrode is contact resistance R8 respectively, resistance R11, triode VT4 emitter, resistance R6 and resistance R12, the resistance R8 other end connects key switch S1, and the key switch S1 other end connects the key switch S2 other end respectively, the electric capacity C3 other end, resistance R10 and triode VT3 base stage, triode VT3 collector electrode contact resistance R9, the resistance R9 other end is the contact resistance R11 other end and triode VT4 base stage respectively, the triode VT4 collector connection relay K coil other end, the described resistance R10 other end is the contact resistance R6 other end and diode D3 negative pole respectively, described resistance R12 other end connecting luminous diode D4 positive pole.

As the utility model further scheme: described chip U1 model is NE555.

Compared with prior art, the beneficial effects of the utility model are: the utility model light sensation power save circuit controls to coordinate with hand push button the control carrying out classroom lighting by light sensation automatically, when Indoor Natural illuminance reaches satisfied normal teaching request, light automatic distinguishing, in overcast and rainy and evening, indoor light intensity drops to a certain degree, and light fixture can be manually opened as required.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of light sensation power save circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, in the utility model embodiment, a kind of light sensation power save circuit, comprises chip U1, resistance R1, transformer T, rectifier bridge Q, triode VT1 and relay K, transformer T primary coil two ends connect 220V alternating current, and transformer T secondary coil two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3, rectifier bridge Q pin 2 contact resistance R1 respectively respectively, photodiode D2 negative pole, chip U1 pin 4, chip U1 pin 8, triode VT2 emitter and electric capacity C1, the electric capacity C1 other end connects rectifier bridge Q pin 4 respectively, light-emitting diode D1 negative pole, resistance R3, electric capacity C2, chip U1 pin 1, resistance R5, triode VT1 emitter, key switch S2, electric capacity C3, triode VT3 emitter, relay K coil, diode D3 positive pole and light-emitting diode D4 negative pole, resistance R1 other end connecting luminous diode D1 positive pole, photodiode D2 positive pole contact resistance R2, the resistance R2 other end is the contact resistance R3 other end respectively, chip U1 pin 2, chip U1 pin 6 and the electric capacity C2 other end, the chip U1 pin 5 contact resistance R5 other end, chip U1 pin 3 is by resistance R4 connecting triode VT1 base stage, and triode VT1 collector electrode is by resistance R7 connecting triode VT2 base stage, and triode VT2 collector electrode is contact resistance R8 respectively, resistance R11, triode VT4 emitter, resistance R6 and resistance R12, the resistance R8 other end connects key switch S1, and the key switch S1 other end connects the key switch S2 other end respectively, the electric capacity C3 other end, resistance R10 and triode VT3 base stage, triode VT3 collector electrode contact resistance R9, the resistance R9 other end is the contact resistance R11 other end and triode VT4 base stage respectively, the triode VT4 collector connection relay K coil other end, the resistance R10 other end is the contact resistance R6 other end and diode D3 negative pole respectively, resistance R12 other end connecting luminous diode D4 positive pole.

Chip U1 model is NE555.

Operation principle of the present utility model is: refer to Fig. 1, first step-down rectifier and filtering are carried out to 220V civil power, 220V alternating current is converted to 12V direct voltage, with light-emitting diode D1 as on/off indicator light, 12V direct current is by photodiode D2 and resistance R2, 2 of chip NE555 are added in after R3 dividing potential drop, 6 pin, when Indoor Natural illuminance declines, the internal resistance of photodiode D2 slowly becomes large, be added in 2 of chip NE555, 6 pin voltages can decline gradually, in time being down to 1/3VCC, chip NE555 output state reverses, its 3 pin will export high level, make triode VT1 and VT2 saturation conduction, light-emitting diode D4 electrified light emitting, light-emitting diode D4 in circuit act as lighting pilot lamp, after luminescence, namely show that indoor light is dark, allow to open light, now press switch S 1, power supply will be added in the base stage of triode VT3, make triode VT3 and triode VT4 saturation conduction, simultaneously, triode VT4 collector voltage through resistance feedback to triode VT3 base stage, triode VT3 and triode VT4 is made to maintain conducting state, ensure relay K adhesive and self-insurance, connect religion indoor lighting circuit, light is opened, press switch S 2 when needs are turned off the light, triode VT3 and VT4 ends, and relay K discharges, and cuts off lighting circuit, lights.

When Indoor Natural illuminance gradually grow time, the internal resistance of photodiode D2 diminishes gradually, be added in 2 of chip NE555,6 pin voltages to rise gradually, until when rising to 2/3VCC, its 3 pin will output low level, and triode VT1 and VT2 is ended, late-class circuit power-off, relay K discharges, and classroom inner light source circuit disconnects, light automatic distinguishing.

Irradiating photodiode D2 for preventing the instantaneous strong lights such as lightning at night, car light makes religion indoor lighting circuit disconnect, and electric capacity C2 should use the electric capacity that capacity is larger; Simultaneously for improving the reliability of circuit, adding electric capacity C3 prevents external interference; Interior circuit breaks by leading to and by breaking to logical process, can there is certain lag time, and suitably reduce electronics R5 resistance, lag time can shorten.

Claims (2)

1. a light sensation power save circuit, comprises chip U1, resistance R1, transformer T, rectifier bridge Q, triode VT1 and relay K, is characterized in that, described transformer T primary coil two ends connect 220V alternating current, and transformer T secondary coil two ends connect rectifier bridge Q pin 1 and rectifier bridge Q pin 3, rectifier bridge Q pin 2 contact resistance R1 respectively respectively, photodiode D2 negative pole, chip U1 pin 4, chip U1 pin 8, triode VT2 emitter and electric capacity C1, the electric capacity C1 other end connects rectifier bridge Q pin 4 respectively, light-emitting diode D1 negative pole, resistance R3, electric capacity C2, chip U1 pin 1, resistance R5, triode VT1 emitter, key switch S2, electric capacity C3, triode VT3 emitter, relay K coil, diode D3 positive pole and light-emitting diode D4 negative pole, described resistance R1 other end connecting luminous diode D1 positive pole, photodiode D2 positive pole contact resistance R2, the resistance R2 other end is the contact resistance R3 other end respectively, chip U1 pin 2, chip U1 pin 6 and the electric capacity C2 other end, the chip U1 pin 5 contact resistance R5 other end, chip U1 pin 3 is by resistance R4 connecting triode VT1 base stage, and triode VT1 collector electrode is by resistance R7 connecting triode VT2 base stage, and triode VT2 collector electrode is contact resistance R8 respectively, resistance R11, triode VT4 emitter, resistance R6 and resistance R12, the resistance R8 other end connects key switch S1, and the key switch S1 other end connects the key switch S2 other end respectively, the electric capacity C3 other end, resistance R10 and triode VT3 base stage, triode VT3 collector electrode contact resistance R9, the resistance R9 other end is the contact resistance R11 other end and triode VT4 base stage respectively, the triode VT4 collector connection relay K coil other end, the described resistance R10 other end is the contact resistance R6 other end and diode D3 negative pole respectively, described resistance R12 other end connecting luminous diode D4 positive pole.

2. light sensation power save circuit according to claim 1, is characterized in that, described chip U1 model is NE555.