CN103179727B - LED flashing control circuitry and alarm - Google Patents

LED flashing control circuitry and alarm Download PDF

Info

Publication number
CN103179727B
CN103179727B CN201110435630.8A CN201110435630A CN103179727B CN 103179727 B CN103179727 B CN 103179727B CN 201110435630 A CN201110435630 A CN 201110435630A CN 103179727 B CN103179727 B CN 103179727B
Authority
CN
China
Prior art keywords
constant current
led
type flip
flip flop
current chip
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
Application number
CN201110435630.8A
Other languages
Chinese (zh)
Other versions
CN103179727A (en
Inventor
周明杰
邵贤辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oceans King Lighting Science and Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Oceans King Lighting Science and Technology Co Ltd
Priority to CN201110435630.8A priority Critical patent/CN103179727B/en
Publication of CN103179727A publication Critical patent/CN103179727A/en
Application granted granted Critical
Publication of CN103179727B publication Critical patent/CN103179727B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)

Abstract

A kind of LED flashing control circuitry, LED for driving constant current carries out flicker and controls, comprise the switch for the plant-grid connection of control LED flashing control circuitry and constant current chip, described LED is connected between described switch and the current output terminal of constant current chip, wherein the negative pole of LED is electrically connected with the current output terminal of constant current chip, the earth terminal ground connection of described constant current chip; Described circuit comprises the control module be connected between described switch and the power input of constant current chip, and described control module periodically exports high level and low level, and described constant current chip obtains or lose the job electric current.Foregoing circuit controls the break-make of constant current chip by controlling the trigger condition of d type flip flop, and then realizes controlling the electric current by LED, thus can control LED, and circuit structure is simple, and stable performance, is easy to be grasped by majority, is convenient to extensive use.In addition, a kind of alarm is also provided.

Description

LED flashing control circuitry and alarm
[technical field]
The present invention relates to flashing circuit, particularly relate to a kind of LED flashing control circuitry and alarm.
[background technology]
A kind of LED flashing circuit comprises power supply, single-chip microcomputer, switching tube and LED.The general principle of circuit is utilize single-chip microcomputer to export conducting and cut-off that the impulse waveform of certain frequency carrys out control switch pipe, and then realizes the flicker of LED load by conducting and the cut-off of switching tube.
This circuit needs software control, because program difference is large, and program quality varies with each individual, and therefore, the situations such as deadlock, program fleet that in use there will be cause circuit stability poor.Meanwhile, because employ single-chip microcomputer, therefore actual use procedure requires a lot, and such as, single-chip microcomputer needs the regular hour to debug and testing authentication, and single-chip microcomputer price is relatively high.
[summary of the invention]
Based on this, be necessary to provide a kind of low cost, stability high, use simple LED flashing control circuitry.
A kind of LED flashing control circuitry, LED for driving constant current carries out flicker and controls, comprise the switch for the plant-grid connection of control LED flashing control circuitry and constant current chip, described LED is connected between described switch and the current output terminal of constant current chip, wherein the negative pole of LED is electrically connected with the current output terminal of constant current chip, the earth terminal ground connection of described constant current chip;
Described circuit comprises the control module be connected between described switch and the power input of constant current chip, and described control module periodically exports high level and low level, and described constant current chip obtains or lose the job electric current.
Preferably, described control module comprises resistance R 1, resistance R 2, electric capacity C 1, electric capacity C 2, diode D 1, d type flip flop U 1with d type flip flop U 2, wherein:
Described d type flip flop U 1trigger end be connected power supply with power input by described switch;
Described d type flip flop U 1set end and earth terminal ground connection;
Described d type flip flop U 1clock end contact resistance R 1with electric capacity C 1, described resistance R 1the other end connects power supply by switch, described electric capacity C 1other end ground connection;
Described d type flip flop U 1clock end be connected diode D with between next state end 1, described diode D 1positive pole is held with CK and is connected, and negative pole is connected with next state end;
Described d type flip flop U 1existing state end contact resistance R successively 2, electric capacity C 2; Described electric capacity C 2one end and resistance R 2electrical connection, other end ground connection;
Described d type flip flop U 1clear terminal and resistance R 2with electric capacity C 2common port electrical connection;
Described d type flip flop U 1existing state end also with d type flip flop U 2clock end connect;
Described d type flip flop U 2d end be electrically connected with next state end, clear terminal and the equal ground connection of set end, power input is connected with power supply by switch, show state end be connected with the current input terminal of described constant current chip.
Preferably, described d type flip flop U 1, U 2be integrated form double D trigger.
Preferably, described circuit also comprises the electrochemical capacitor C for power supply voltage stabilizing 3, described electrochemical capacitor C 3one end connects power supply by switch.
Preferably, described circuit also comprises resistance R 3, described resistance R 3be connected in parallel on electric capacity C 1two ends.
Preferably, described circuit also comprises sampling resistor R 4, described sampling resistor R 4be connected electrically between the sampling end of constant current chip and ground.
Preferably, described LED is that several are in parallel.
Be necessary in addition to provide a kind of low cost, stability high, use simple alarm.
A kind of alarm, is characterized in that, comprising:
Above-mentioned LED flashing control circuitry and loud speaker, the LED strip in described loud speaker and LED flashing control circuitry joins.
Preferably, described control module controls described constant current chip with the rate-adaptive pacemaker high level of 1Hz and low level by d type flip flop and to obtain or lose the job electric current under the control of clock pulse.
Preferably, described loud speaker is connected between described constant current chip current output terminal and ground.
Foregoing circuit controls the break-make of constant current chip by controlling the trigger condition of d type flip flop, and then realizes controlling the electric current by LED, thus can control LED, and circuit structure is simple, and stable performance, is easy to be grasped by majority, is convenient to extensive use.
[accompanying drawing explanation]
Fig. 1 is a kind of structural representation of LED flashing control circuitry;
Fig. 2 is the schematic diagram of the LED flashing control circuitry in an embodiment;
Fig. 3 is the schematic diagram of the flashing control circuitry of LED in another embodiment;
Fig. 4 is a kind of circuit theory diagrams of alarm.
[embodiment]
As shown in Figure 1, be a kind of structural representation of LED flashing control circuitry.LED flashing control circuitry is used for carrying out flicker to the LED that constant current drives and controls, comprise the switch 100 for the plant-grid connection of control LED flashing control circuitry and constant current chip 200, described LED is connected between described switch 100 and the current output terminal of constant current chip 200, wherein the negative pole of LED is electrically connected with the current output terminal of constant current chip 200, the earth terminal ground connection of described constant current chip 200.LED flashing control circuitry also comprises the control module 300 be connected between described switch 100 and the power input of constant current chip 200, described control module 300 periodically exports high level and low level, thus constant current chip 200 is obtained or lose the job electric current.
Switch 100 is mainly used in the plant-grid connection of control LED flashing control circuitry.
Constant current chip 200 comprises power input (VDD), current output terminal (D), earth terminal (GND) and sampling end (CS).Power input (VDD) is connected with control module 300, and current output terminal (D) is connected with the negative pole of LED, earth terminal (GND) ground connection.Sampling end (CS) connects ground connection after sampling resistor.When the level of the current input terminal (VDD) of constant current chip 200 is high level, constant current chip 200 conducting, load LED obtains electric work; When the level of current input terminal (VDD) is low level, constant current chip 200 power-off, load LED dead electricity quits work.
Control module 300 is mainly used in periodically exporting high level and low level to constant current chip 200, constant current chip 200 periodic electric and dead electricity, make load LED periodically light and extinguish.
As shown in Figure 2, be the schematic diagram of LED flashing control circuitry.Comprise switch 100, constant current chip 200 and control module 300.
Control module 300 comprises resistance R 1, resistance R 2, electric capacity C 1, electric capacity C 2, diode D 1, d type flip flop U 1with d type flip flop U 2.
Wherein: d type flip flop U 1trigger end (D end) be connected power supply with power input (V end) by described switch 100.
D type flip flop U 1set end (S end) and earth terminal (G end) ground connection.Clock end (CK end) the contact resistance R of d type flip flop U1 1with electric capacity C 1, described resistance R 1the other end connects power supply by switch 100, described electric capacity C 1other end ground connection.
D type flip flop U 1clock end (CK end) and next state end ( end) between connect diode D 1, described diode D 1positive pole is connected with clock end (CK holds), negative pole and next state end ( end) connect.
D type flip flop U 1existing state end (Q end) contact resistance R successively 2, electric capacity C 2; Described electric capacity C 2one end and resistance R 2electrical connection, other end ground connection.
D type flip flop U 1clear terminal (R end) and resistance R 2with electric capacity C 2common port electrical connection.
D type flip flop U 1existing state end (Q end) also with d type flip flop U 2clock end (CK end) connect.
D type flip flop U 2trigger end (D end) and next state end ( end) electrical connection, clear terminal (R end) and set end (S end) all ground connection, power input (V end) is connected with power supply by switch 100, and existing state end (Q end) is connected with the current input terminal of described constant current chip 200.
Preferably, d type flip flop U 1with d type flip flop U 2for integrated form double D trigger.
The logical relation of each pin of D flip-flop is as in the table below:
Wherein, × representing that its logical value and this row State Transferring have nothing to do, Note 1 represents that current potential changes.
As above show, for the truth table of d type flip flop, (the R=0 when the clear terminal (R end) of trigger, set end (S end) are all low level can be seen from table, S=0), when there is rising edge pulse in clock end (CK end), trigger will produce action, existing state end (Q end) just can follow the state of trigger end (D end), namely trigger end (D end) is also high level for showing state end (Q end) during high level, otherwise is also all low level; When clear terminal (R end), set end (S end) are respectively high and low level (R=1, S=0), Q holds perseverance to be low level, while next state end ( end) perseverance is high level.
Based on above-described embodiment, the course of work of circuit is as shown in Figure 2: when switch 100 closes, the moment (t that power supply is connected 0moment), electric capacity C 1, electric capacity C 2voltage is 0.D type flip flop U 1clear terminal (R end) and set end (S end) be low level (i.e. R=0, S=0), now d type flip flop U 1existing state end (Q end) be low level, d type flip flop U 1next state end ( end) be high level.D type flip flop U 2existing state end (Q end) be low level, d type flip flop U 2next state end ( end) be high level.
Switch 100 connects rear power supply by resistance R 1to electric capacity C 1charging, electric capacity C 1terminal voltage raises gradually.As electric capacity C 1both end voltage exceedes (t after the clock threshold level of trigger 1moment), d type flip flop U 1just once inside out action to be performed.Due to now d type flip flop U 1trigger end (D end) be high level, then d type flip flop U after trigger action 1existing state end (Q end) become high level, simultaneously d type flip flop U 1next state end ( end) become low level.Electric capacity C 2both end voltage raises gradually, d type flip flop U 2clock end (CK end) there is rising edge pulse, d type flip flop U 2rotary movement will be carried out, d type flip flop U 2existing state end (Q end) become high level, d type flip flop U 2next state end ( end) become low level.The power input (VDD) of constant current chip 200 is connected and is started working, and load LED is bright.The next state end of d type flip flop U1 ( end) become low level after, electric capacity C 1by diode D 1to ground electric discharge, electric capacity C 1both end voltage is down to low level gradually.
As electric capacity C 2(t after both end voltage becomes high level 2moment), d type flip flop U 1clear terminal (R end), set end (S end) state be respectively high and low (i.e. R=1, S=0), then d type flip flop U 1existing state end (Q end) become low level, d type flip flop U 1next state end ( end) become high level.
D type flip flop U 1existing state end (Q end) become low level after, electric capacity C 2pass through R 2electric discharge, electric capacity C 2both end voltage is down to low level (t gradually 3moment), now d type flip flop U 1state got back to again switch 100 connect moment state (i.e. R=0, S=0, Q=0, CK=0, D=1).
After this electric capacity C 1, electric capacity C 2and d type flip flop U 1again can according to above-mentioned t 0-t 2-t 3-t 0change in process, in this change procedure, as d type flip flop U 1existing state end (Q end) become high level from low level, i.e. d type flip flop U 2clock end (CK end) when there is rising edge pulse, d type flip flop U 2once inside out action will be carried out, d type flip flop U 2existing state end (Q end) become low level, d type flip flop U 2next state end ( end) become high level, now constant current chip 200 power-off quits work, and load LED extinguishes.Scitillation process that load LED one-period one bright one goes out that Here it is, after this circuit can repeat process above automatically, d type flip flop U 2existing state end (Q end) alternately export high and low level, realize the flicker of LED.Further, adjusting resistance R 2with electric capacity C 2value can adjust flicker frequency.
Based on above-described embodiment, further, as shown in Figure 3, be the schematic diagram of LED flashing control circuitry in another embodiment.Wherein, LED flashing control circuitry also comprises electrochemical capacitor C 3, described electrochemical capacitor C 3one end connects power supply by switch, other end ground connection, described electrochemical capacitor C 3for power supply voltage stabilizing.
Further, LED flashing control circuitry also comprises sampling resistor R 4, described sampling resistor R 4between the sampling end being connected electrically in constant current chip 200 and ground.
Control module 300 also comprises resistance R 3, described resistance R 3be connected in parallel on electric capacity C 1two ends, resistance R 3for dividing potential drop.
In LED flashing control circuitry, LED is that several are in parallel.
Based on above-described embodiment, a kind of alarm, comprises above-mentioned LED flashing control circuitry and loud speaker SP, and the LED strip in loud speaker SP and LED flashing control circuitry joins.Control module 300 in circuit controls described constant current chip 200 with the rate-adaptive pacemaker high level of 1Hz and low level by d type flip flop and to obtain or lose the job electric current under the control of clock pulse.
In the present embodiment, loud speaker SP is connected between constant current chip 200 current output terminal and ground.
In the present embodiment, as shown in Figure 4, be the circuit theory diagrams of alarm.Fig. 4 is specially a kind of alarm circuit.What d type flip flop adopted is integrated form double D trigger.Load is 24 red LED and loud speaker SP.Power supply is powered by polymer during 3.7V1.25A.Wherein, resistance R 1for 18M Ω, resistance R 2for 18M Ω, electric capacity C 1for 104pF, electric capacity C 2for 104pF, diode D 1model is IN4148, d type flip flop U 1with d type flip flop U 2for integrated form double D trigger, constant current chip model is QX7136, electrochemical capacitor C 3for 47u63v, divider resistance R 3for 47M Ω, sampling resistor R 4be 12 Ω.After setting above-mentioned parameter, the load LED in circuit shown in Fig. 4 can with the frequency scintillation of 1HZ, and when switch disconnects, load LED stops flicker and loud speaker SP stop alarm sound.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (9)

1. a LED flashing control circuitry, LED for driving constant current carries out flicker and controls, comprise the switch for the plant-grid connection of control LED flashing control circuitry and constant current chip, described LED is connected between described switch and the current output terminal of constant current chip, wherein the negative pole of LED is electrically connected with the current output terminal of constant current chip, the earth terminal ground connection of described constant current chip;
It is characterized in that, described circuit comprises the control module be connected between described switch and the power input of constant current chip, and described control module periodically exports high level and low level and to obtain or lose the job electric current to control described constant current chip; Described control module comprises resistance R 1, resistance R 2, electric capacity C 1, electric capacity C 2, diode D 1, d type flip flop U 1with d type flip flop U 2, wherein:
Described d type flip flop U 1trigger end be connected power supply with power input by described switch;
Described d type flip flop U 1set end and earth terminal ground connection;
Described d type flip flop U 1clock end contact resistance R 1with electric capacity C 1, described resistance R 1the other end connects power supply by switch, described electric capacity C 1other end ground connection;
Described d type flip flop U 1clock end be connected diode D with between next state end 1, described diode D 1positive pole is connected with clock end, and negative pole is connected with next state end;
Described d type flip flop U 1existing state end contact resistance R successively 2, electric capacity C 2; Described electric capacity C 2one end and resistance R 2electrical connection, other end ground connection;
Described d type flip flop U 1clear terminal and resistance R 2with electric capacity C 2common port electrical connection;
Described d type flip flop U 1existing state end also with d type flip flop U 2clock end connect;
Described d type flip flop U 2d trigger end be electrically connected with next state end, clear terminal and the equal ground connection of set end, power input is connected with power supply by switch, and existing state end is connected with the current input terminal of described constant current chip.
2. LED flashing control circuitry according to claim 1, is characterized in that, described d type flip flop U 1, U 2be integrated form double D trigger.
3. LED flashing control circuitry according to claim 1, is characterized in that, described circuit also comprises the electrochemical capacitor C for power supply voltage stabilizing 3, described electrochemical capacitor C 3one end connects power supply by switch.
4. LED flashing control circuitry according to claim 1, is characterized in that, described circuit also comprises resistance R 3, described resistance R 3be connected in parallel on electric capacity C 1two ends.
5. LED flashing control circuitry according to claim 1, is characterized in that, described circuit also comprises sampling resistor R 4, described sampling resistor R 4be connected electrically between the sampling end of constant current chip and ground.
6. LED flashing control circuitry according to claim 1, is characterized in that, described LED is that several are in parallel.
7. an alarm, is characterized in that, comprising:
LED flashing control circuitry as described in claim 1 to 6 any one and loud speaker, the LED strip in described loud speaker and LED flashing control circuitry joins.
8. alarm according to claim 7, is characterized in that, described control module controls described constant current chip with the rate-adaptive pacemaker high level of 1Hz and low level by d type flip flop and to obtain or lose the job electric current under the control of clock pulse.
9. alarm according to claim 7, is characterized in that, described loud speaker is connected between described constant current chip current output terminal and ground.
CN201110435630.8A 2011-12-22 2011-12-22 LED flashing control circuitry and alarm Expired - Fee Related CN103179727B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110435630.8A CN103179727B (en) 2011-12-22 2011-12-22 LED flashing control circuitry and alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110435630.8A CN103179727B (en) 2011-12-22 2011-12-22 LED flashing control circuitry and alarm

Publications (2)

Publication Number Publication Date
CN103179727A CN103179727A (en) 2013-06-26
CN103179727B true CN103179727B (en) 2015-09-23

Family

ID=48639273

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110435630.8A Expired - Fee Related CN103179727B (en) 2011-12-22 2011-12-22 LED flashing control circuitry and alarm

Country Status (1)

Country Link
CN (1) CN103179727B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104684172A (en) * 2013-11-28 2015-06-03 海洋王(东莞)照明科技有限公司 Lamp flash drive control circuit
CN104936354B (en) * 2015-06-26 2018-10-19 上海沪工汽车电器有限公司 Lamp control module and control method in a kind of automobile-used rear chamber

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101330785A (en) * 2008-08-04 2008-12-24 梁莉丽 High voltage AC light-adjusting controller for general constant-current LED
CN101808453A (en) * 2010-04-14 2010-08-18 上海晶丰明源半导体有限公司 LED lighting driving circuit and method by using compatible silicon controlled light adjuster to adjust light
CN101827477A (en) * 2009-03-06 2010-09-08 夏普株式会社 Led drive circuit, LED lamp, LED lighting apparatus and LED illuminator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7321203B2 (en) * 2006-03-13 2008-01-22 Linear Technology Corporation LED dimming control technique for increasing the maximum PWM dimming ratio and avoiding LED flicker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101330785A (en) * 2008-08-04 2008-12-24 梁莉丽 High voltage AC light-adjusting controller for general constant-current LED
CN101827477A (en) * 2009-03-06 2010-09-08 夏普株式会社 Led drive circuit, LED lamp, LED lighting apparatus and LED illuminator
CN101808453A (en) * 2010-04-14 2010-08-18 上海晶丰明源半导体有限公司 LED lighting driving circuit and method by using compatible silicon controlled light adjuster to adjust light

Also Published As

Publication number Publication date
CN103179727A (en) 2013-06-26

Similar Documents

Publication Publication Date Title
CN103179727B (en) LED flashing control circuitry and alarm
CN104767439B (en) PWM pulse width speed regulation signal setting and fault code feedback circuit
CN103051033B (en) Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit
CN206533171U (en) The charging device of voltage comparator circuit and battery
CN106439716B (en) Solar human body control sensor and control method
CN103138356A (en) Lighting fitting and charging circuit of secondary battery
CN201869634U (en) Energy-efficient and automatic control device for drip irrigation
CN202856419U (en) Alarm clock circuit structure
CN203965816U (en) A kind of timer for power frequency charging set reservation charging
CN204462663U (en) A kind of three-color LED electric dial clock
CN203261560U (en) Stroboflash-free circuit
CN208424864U (en) Solar LED street lamp control system
CN202818730U (en) Multifunctional working lamp
CN203732605U (en) Battery voltage detecting circuit
CN205827124U (en) A kind of electronic clock of punctual timing
CN103595079A (en) Cell charging and discharging display circuit
CN204795761U (en) Solar street lamp control circuit
CN213634199U (en) Automatic continuous aging testing circuit for program control instrument
CN203672996U (en) Cabinet door opening and closing detection circuit of intelligent package delivery cabinet
CN204377195U (en) Battery lamp positive-negative connected commutation circuit
CN202757994U (en) Light source power detecting device
CN103066646A (en) Electric quantity indicating circuit of storage battery
CN210223898U (en) Bluetooth timing switch
CN214592069U (en) Power-on automatic indicating circuit
CN204031030U (en) A kind of energy-efficient micromachine drive circuit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150923

Termination date: 20181222