电子报警器电路图
摩托车报警器电路图et电子技术网
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摩托车报警器电路图
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20070224
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anynumberofnormallyopenswitchesmaybeused.fitthemercuryswitchessothattheyclosewhenthesteeringismovedorwhenthebikeisliftedoffitssidestandorpushedforwardoffitscentrestand.usemicroswitchestoprotectremovablepanelsandthelidsofpanniersetc.whileatleastoneswitchremainsclosed,thesirenwillsound.abouttwominutesaftertheswitcheshavebeenopenedagain,thealarmwillreset.howlongittakestoswitchoffdependsonthecharacteristicsoftheactualcomponentsused.but,uptoapoint,youcanadjustthetimetosuityourrequirementsbychangingthevalueofc1.
thecircuitboardandswitchesmustbeprotectedfromtheelements.dampnessorcondensationwillcausemalfunction.withoutitsterminalblocks,theboardissmall.ideally,youshouldtrytofindasirenwithenoughsparespaceinsidetoaccommodateit.fita1ampinlinefuseclosetothepowersource.thisprotectsthewiring.insteadofusingakeyswitchyoucanuseahiddenswitch;oryoucouldusethenormallyclosedcontactsofasmallrelay.wiretherelaycoilsothatitisenergizedwhiletheignitionison.theneverytimeyouturntheignitionoff,thealarmwillsetitself.
whenit‘snotsounding,thecircuitusesvirtuallynocurrent.thisshouldmakeitusefulinothercircumstances.forexample,poweredbydrybatteriesandwiththerelayandsirenvoltagestosuit,itcouldbefittedinsideacomputeroranythingelsethat‘sindangerofbeingpickedupandcarriedaway.thelowstandbycurrentandautomaticresetmeansthatforthissortofapplicationanexternalon/offswitchmaynotbenecessary.
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