CN202750284U

CN202750284U - Light-emitting diode (LED) colored lamp control circuit

Info

Publication number: CN202750284U
Application number: CN2012203816145U
Authority: CN
Inventors: 夏积富; 陈伟; 金崇虎
Original assignee: ZHEJIANG TIANTIAN ELECTRONIC CO Ltd
Current assignee: ZHEJIANG TIANTIAN ELECTRONIC CO Ltd
Priority date: 2012-08-02
Filing date: 2012-08-02
Publication date: 2013-02-20
Anticipated expiration: 2022-08-02

Abstract

The utility model provides a light-emitting diode (LED) colored lamp control circuit which comprises a single chip microcomputer U. A power supply end of the single chip microcomputer U is connected with a direct-current power supply vcc. The LED colored lamp control circuit further comprises a plurality of shift registers U1. A latch end OE, a clock end CK and a data end DI of the single chip microcomputer U are connected with the shift registers U1, output ends of the shift registers U1 are connected with a base electrode of a triode Q through resistors, an emitting electrode of the triode Q is connected with a common terminal, and lamp strings L comprising at least one LED are in series connection with a circuit where a collector electrode of the triode Q and the common terminal. Output ends of the single chip microcomputer U are connected to the plurality of shift registers U1, control signals are output to the lamp strings L through the shift registers U1, output ports of the control signals are expanded, and the number of the lamp strings L which the same control circuit can be connected with and control is increased.

Description

A kind of LED color light control circuit

Technical field

The utility model relates to the LED color lamp, specifically, relates in particular to a kind of LED color light control circuit.

Background technology

Tradition LED color lamp is controlled by the hardware control circuit that oscillator, counter and decoder etc. forms usually, and not only control circuit is complicated, price, and can only control the LED color lamp and realize some simple functions, give people's visual effect stiff.For overcoming the volume defective of traditional control circuit, available technology adopting in conjunction with simple peripheral circuit, adopts the method for software and hardware combining take single-chip microcomputer as core controller, realizes the control to the LED color lamp, and circuit is simple, and cost is low, and the color lamp effect is abundant.But because the single-chip microcomputer output port is limited, in a fairly large number of occasion of lamp string L, the single-chip microcomputer output port can not satisfy instructions for use.

The utility model content

The purpose of this utility model is for the problems referred to above, and a kind of LED color light control circuit is provided, and has expanded the output port of control signal, has increased the quantity that same control circuit can connect the lamp string L of control.

For achieving the above object, the utility model has adopted following technical proposal: a kind of LED color light control circuit is provided, comprise single-chip microcomputer U, the power end of described single-chip microcomputer U connects DC power supply Vcc, wherein, also comprise a plurality of shift register U1, OE is held in latching of described single-chip microcomputer U, clock end CK, data terminal DI all is connected with shift register U1, the base stage of the output of described shift register U1 connecting triode Q behind resistance, the emitter of this triode Q connects common port, the lamp string L that connects and comprise at least one LEDs in the collector electrode of described triode Q and the loop, common port place.

Above-mentioned LED color light control circuit, wherein, the power supply of described shift register U1 comprises resistance R and voltage-stabiliser tube ZD, described resistance R one end connects DC power supply Vcc, this resistance R other end connects voltage-stabiliser tube ZD negative electrode, described voltage-stabiliser tube ZD anodic bonding common port, described voltage-stabiliser tube ZD two ends shunt capacitance C.

Above-mentioned LED color light control circuit wherein, also is connected button S between the input of described single-chip microcomputer U and the common port, and this button S two ends shunt capacitance.

Compared with prior art, the utility model has the advantage of: the LED color light control circuit that the utility model provides, the output of single-chip microcomputer U is connected to a plurality of shift register U1, export control signal by shift register U1 to lamp string L again, expand the output port of control signal, increased the quantity that same control circuit can connect the lamp string L of control.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the electrical block diagram of a kind of LED color light control of the utility model circuit.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

As shown in Figure 1, the LED color light control circuit that the utility model provides, comprise single-chip microcomputer U, the power end of described single-chip microcomputer U connects DC power supply Vcc, wherein, also comprise a plurality of shift register U1, OE is held in latching of described single-chip microcomputer U, clock end CK, data terminal DI all is connected with shift register U1, the base stage of the output of described shift register U1 connecting triode Q behind resistance, the emitter of this triode Q connects common port, connect in the collector electrode of described triode Q and the loop, common port place not shown among the lamp string L(Fig. 1 that comprises at least one LEDs), expanded the output port of control signal by shift register U1, thereby same control circuit can be controlled more lamp string L.In addition, the power supply of described shift register U1 comprises resistance R and voltage-stabiliser tube ZD, and described resistance R one end connects DC power supply Vcc, and this resistance R other end connects voltage-stabiliser tube ZD negative electrode, described voltage-stabiliser tube ZD anodic bonding common port, described voltage-stabiliser tube ZD two ends shunt capacitance C.Also be connected button S between the input of described single-chip microcomputer U and the common port, and this button S two ends shunt capacitance.

Preferably, the model of single-chip microcomputer U can be ATMEGA48, and the model of shift register U1 can be MC14094.

In sum, the utility model has the advantage of: the LED color light control circuit that the utility model provides, the output of single-chip microcomputer U is connected to a plurality of shift register U1, export control signal by shift register U1 to lamp string L again, expand the output port of control signal, increased the quantity that same control circuit can connect the lamp string L of control.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. LED color light control circuit, comprise single-chip microcomputer U, the power end of described single-chip microcomputer U connects DC power supply Vcc, it is characterized in that: also comprise a plurality of shift register U1, latching of described single-chip microcomputer U holds OE, clock end CK, data terminal DI all to be connected with shift register U1, the base stage of the output of described shift register U1 connecting triode Q behind resistance, the emitter of this triode Q connects common port, the lamp string L that connects and comprise at least one LEDs in the collector electrode of described triode Q and the loop, common port place.

2. LED color light control circuit according to claim 1, it is characterized in that: the power supply of described shift register U1 comprises resistance R and voltage-stabiliser tube ZD, described resistance R one end connects DC power supply Vcc, this resistance R other end connects voltage-stabiliser tube ZD negative electrode, described voltage-stabiliser tube ZD anodic bonding common port, described voltage-stabiliser tube ZD two ends shunt capacitance C.

3. LED color light control circuit according to claim 1 is characterized in that: also be connected button S between the input of described single-chip microcomputer U and the common port, and this button S two ends shunt capacitance.