555定时器构成的报警电路设计

:1673-6397(2009)01-0065-02555,,(海军蚌埠士官学校基础部,安徽蚌埠233012):两块555定时器和外接定时元件RC构成的两个多谐振荡器电路就构成了防盗报警装置其中,第一块555定时器的输出方波信号控制发光二极管的发光,第二块555定时器的振荡频率被第一块555定时器的输出电压调制为两种音频频率,使扬声器发出双音声响:555定时器;多谐振荡器;报警电路:TN492:ATheWarningCircuitDesignof555TimesZHUHong-yong,CHENYong,WANGBo(GeneralStudyProgram,BengbuNavalPettyOfficerAcademy,Bengbu233012,China)Abstract:Warningstructurewhichusedtoagainstthethiefcanbemadeupoftwo555timersandtwomultivibratorcircuitswhichisconsistofoutertimerorganRandC.Thefirst555timerexportssquarewavesignaltocontroltheluminescenceoftheLBD,andthesurgefrequencyofthesecond555timerismodulatedintotwoaudiofrequenciesbytheoutputvoltageofthefirst555timer,whichcanmaketheloudhailergiveoffbothtones.KeyWords:555Timer;Multivibrator;WarningCircuit:(1976-),,,,,,,,,?,1555555,3555521416,R-S3CMOS,,,UCC=+5V~+16V,200mA,1555RD(4),CO(5),GND(1),D(7),VCC(8),OUT(3),TL(2)TH(6)555,,2009I.C.E&Powerplant20096,,555,155525552555RC,,,,RC2555RD(4),,RD=0,555,u01=u02=0,LED,5554,RD=1,555,uo1,01,3,uo1=1,LED,uo1=0,LED,01R1R2C1,,555RD=1,555,uo2,01,uo1R65555,555,uo1=1,,555;U01=0,,555,3,555555,3,555RC2,ab,,,,5554,,,;,5554RD=1,,,R1R2R3R4C1C2,R1=R3=10k,R2=100k,R4=150k,C1=10F,C2=0.01F,,555,,,555,,,,,:[1].,:,2000.[2].,:,2008.[3].,:,2006.6620096