电子元件符号 电子元件当中,符号D和ZD 分别代表什么元件?
\u7535\u5b50\u5143\u4ef6\u8868\u793a\u7b26\u53f7\u7b2c\u4e00\u8282 \u7535\u963b\u5668
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\u4e8c\u3001\u7535\u963b\u5668\u7684\u6807\u8bc6
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\u989c \u8272 \u6709\u6548\u6570\u5b57 \u4e58 \u6570 \u5141\u8bb8\u504f\u5dee
\u9ed1 \u8272 0 10\u76840\u6b21\u65b9
\u68d5 \u8272 1 10\u76841\u6b21\u65b9 +/- 1%
\u7ea2 \u8272 2 10\u76842\u6b21\u65b9 +/- 2%
\u6a59 \u8272 3 10\u76843\u6b21\u65b9 -----
\u9ec4 \u8272 4 10\u76844\u6b21\u65b9 -----
\u7eff \u8272 5 10\u76845\u6b21\u65b9 +/- 0.5%
\u84dd \u8272 6 10\u76846\u6b21\u65b9 +/- 0.2%
\u7d2b \u8272 7 10\u76847\u6b21\u65b9 +/- 0.1%
\u7070 \u8272 8 10\u76848\u6b21\u65b9 -----
\u767d \u8272 9 10\u76849\u6b21\u65b9 +5~-20%
\u65e0 \u8272 ----- ----- +/- 20%
\u94f6 \u8272 ----- ----- +/- 10%
\u91d1 \u8272 ----- ----- +/- 5%
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1． 电子元件是组成电子产品的基础，了解常用的电子元件的种类、结构、性能并能正确选用是学习、掌握电子技术的基本。2． 电子元件的种类繁多。就安装方式而言，目前可分为传统安装（又称通孔装即DIP）和表面安装两大类（即又称SMT或SMD）。3． 常用的电子元件有：电阻、电容、电感、电位器、变压器、三极管、二极管、IC。4． 电阻：在电路中用“R”表示，单位有欧（Ω）、千欧（ΚΩ）、兆欧（MΩ）。换算：1MΩ=1000KΩ 1KΩ=1000Ω电阻的阻值和误差有：直标法、数码法、色码法。功率型号商标（1）、直标法：在元件表面直接标出数值和误差如图所示：制造日期A R J I W2．7KΩ 5%9998误差阻值2031．106（2）、数码法：用三位数字表示元件标称值，如图：零的个数有效数字从左至右，前二位数表示有效数，第三位为零的个数，即前二位数乘以10n（n=0-8）例如：103=10ΚΩ(3)、色码法：用不同的颜色代表数字，可表示标值和偏差。下表是各种颜色所代表的意义：颜色第一环第二环第三环第四环直接读取数值直接读取数值表示10的N次方表示误差黑000棕111± 1%红222± 2%橙333黄444绿555± 0.5%篮666± 0.25%紫777± 0.10%
r 是电阻 l 是电感 c是电容 led是发光二极管 ic是集成块 vt是三极管 d是二极管
电流A 电压V 电阻R 电容C 电感L
http://hi.baidu.com/happyhu52/blog/item/affebb359794ae335bb5f58a.html
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