高中技术-电子元器件-课件

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名称 高中技术-电子元器件-课件
格式 pptx
文件大小 4.3MB
资源类型 试卷
版本资源 浙教版(2019)
科目 信息技术(信息科技)
更新时间 2025-01-15 15:46:57

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文档简介

(共22张PPT)
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电子元器件
教师:
部门:
中学个性化事业部
王露飞
通用技术
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件
学情分析:
高三学生步入复习阶段,需要进一步加深对元器件的理解更进一步掌握电路题中的考点。因此这节课学生可能会遇到的最大问题是:如何归纳总结电子元器件的特性以及作用用于解决不同情况考题的一般规律,鉴于此,在教学中要积极引导学生采取分解动作、比较迁移等学习策略。
教学目标:
理解电子元器件的概念和特点;通过逐步解析获取电子元器件的解题结构,深层次掌握电子元器件的特性考点;通过分析多种不同的可能情况,逐步归纳元器件的基本思想和方法,能初步利用特性解决简单的问题。
重点难点:
教学重点和难点:分解并理解电子元器件的特性考点。
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电子元器件—电阻
电阻:
1.熟识实物图
2.区分电阻对应的特性
必考点:滑动变阻器的调节以及两种热敏电阻的选用
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电子元器件—电阻练习题
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电子元器件—电阻练习题
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电子元器件—电阻练习题
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电子元器件—电阻练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—电阻总结

low
热敏电阻:
1.PTC正温度系数热敏电阻:温度高时,V(三极管)导通且此时Rt电阻大
2.NTC负温度系数热敏电阻:温度低时,V(三极管)导通且此时Rt电阻大
PS:555芯片不一样:3脚出1,2/6脚出0。
如果2、6脚上方接热敏电阻则考虑vcc在什么温度下阻大输入0;(高温阻大PTC)
如果2/6脚下方接热敏电阻则考虑什么温度下阻值小接地输入0;(低温阻大NTC)
电位器(滑动变阻器)
1.调节上下限(Rp调大还是调小)
2.可以做开关(R值最大化和最小化)
3.串联降压,意味着影响另一个电子元器件的电压大小(串联电阻保护二极管)
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电子元器件—电容
电容的作用:隔直流通交流,存储电荷
1
2
3
4
电容分类以及实物图
电容耐压
电容延时时间:T=2πrc
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电子元器件—电容练习题
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电子元器件—电容练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—电容练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—电容总结
1.电解电容要认识实物图,电路符号,分清正负极
2.电容的测试方法(测电阻时:若指针向右摆动或阻值为零意味电容漏电,内部击穿;若指针摆到某一非零位置不返回说明电容严重漏电;若指针不摆动电容电解液干涸不可用)
3.电容延时:常考增大延时或减少延时的情况可以改变电容量增大容量增加延时,还可以增大三极管的放大倍数,或者增大放电回路上的R值
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—二极管
二极管: PN结正向电压0.7v导通,反向电压-0.7v截止
发光二极管导通电压1.6v和正负极性判断
画 图: 继电器旁反接并联一个二极管保护三极管
发光二极管需要串接一个限流电阻保护发光二极管
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电子元器件—二极管练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—二极管练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—三极管
1.两种类型三极管:PNP型/NPN型
2.三极管三种状态:饱和、放大、截止
3.多用电表测量三极管
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电子元器件—三极管练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—三极管总结
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
电子元器件—三极管练习题
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
总体回顾
滑动变阻器调节
热敏电阻的选用
电阻
电容
电解电容以及作用
延时电路
二极管
二极管连线(画图题)
二极管特性
三极管
三种状态
检测三极管
e7d195523061f1c0f0ec610a92cff745ee13794c7b8d98f8E73673273C9E8BE17CC3D63B9B1D6426C348A354AD505654C28F453CD7C8F90EADD06C08281DAED7140E5AAAED5880ECE414DFB6A93B82BE019406867034C3A8500A4827DCF3FBF74A471B736410707E336A01C9ADC9BE02ACCB8DF2121D81636A067B8AE80C6AB6F014154F4E7B7247
谢 谢