防盗报警器毕业设计

4.5预封锁电路.............................................21

4.5.1整流二极管..........................................21

4.5.2电磁继电器..........................................23

第五章：电路元器件的选择...........................24

5.1元器件的选择...........................................24

5.2安装与使用.............................................25

参考文献...................................................26

门防盗报警器

摘要：近年来随着科技的飞速发展，一些报警器的应用正在不断地走向深入，因此一种廉价，性能灵敏可靠的防盗报警器必须在防盗和保证财产安全方面发挥更有效的作用，该毕业设计就是针对目前的需要，主要用555定时器，及有555定时器构成的单稳态延时电路，三极管及有三极管构成的音响集成电路，灯光控制电路，预封锁电路等电子元器件构成，其特点是灵敏性，可靠性强，具有突发性和隐蔽性。

关键词：555定时器三极管可靠性灵敏性扬声器

summary:inrecentyearsalongwithscienceandtechnologyofflytodevelopsoon,someapplicationswhichreporttothepoliceamachinejustatconstantlyalignmentthorough,soakindofcheap,thefunctionisintelligenttoguardagainstthefttoreporttothepoliceamachinedependablelyandhavetodevelopamorevalidfunctionintheaspectsofguardingagainsttheftwithpromisingpropertyisingsafe,shouldgraduationthedesignistoaimatacurrentdemand,mainlyusing555infixedtimemachine,andhave555infixedtimemachineconstituteofthesinglesteadystatespostponeelectriccircuit,triodetransistorandhavethestereosetsintegratedcircuitsoftriodetransistorcomposing,lightcontrolelectriccircuit,prepareblockaderelectriccircuitetc.electronicsdollarsparepartconstitute,itscharacteristicsisanintelligent,thecredibilityisstrong,havingabruptandconcealment.keyword:555infixedtimemachinethetriodetransistorcredibilityintelligentloudspeaker