我刚做的 测试电流 并且可以直接知道 串接多少电阻的小设备

我刚做的 测试电流 并且可以直接知道 串接多少电阻的小设备

我有批量生产的电子灯箱测试器，直接测电流就可以显示电阻读数

呵呵，楼主精神可嘉，不过做的粗糙点

我本想也做和楼主一样的,指针的读数不准,后来我是用数字万用表测电流.读数直接看出来,很方便的.

[whitepad]***400;200;400,200;;** m52,46 l52,49,51,50,50,50,50,52,48,54,47,57,45,59,44,61,43,62,42,65,40,66,39,68,37,71,36,73,34,75,31,81,29,82,28,84,28,86,27,88 27,89,26,89,26,91,27,91 e|********* m57,88 l56,88,55,90,54,91,54,93,53,93,52,95,52,96,51,99,50,100,50,104,49,107,47,110,47,112,46,114,45,117,44,119,41,128,41,130,38,136,38,139 36,141,36,143,34,147,33,147,33,149,32,150,32,148 e|********* m51,122 l51,126,52,126,52,131,53,132,54,134,54,138,55,140,56,141,56,154 e|********* m66,63 l68,61,70,61,71,60,72,60,74,59,77,58,79,57,80,57,83,56,87,54,90,53,92,53,96,52,117,52,117,89,116,92,114,96,114,99,113,102,111,106 111,108,110,109,110,112,109,113,109,115,108,115,108,116,107,116,107,115,106,114,106,113,105,112 e|********* m71,88 l75,88,79,86,80,85,90,85,93,84,117,84 e|********* m85,122 l89,122,90,121,91,121,93,119,94,119,95,118,97,117,98,117,102,115,105,114,107,114,108,113,110,112,112,112,115,109,115,106,114,106,114,105,113,105,112,104 e|********* m75,62 l76,65,77,67,77,69,78,71,78,78,79,81,80,87,81,91,82,96,82,180,83,179,83,178,84,178,86,176,88,176,90,174,91,174,92,172,94,172,95,171 99,169,100,168,104,166,104,164,106,163,107,162,108,159,109,158 e|********* m118,128 l117,128,117,129,116,129,115,130,114,132,113,132,111,134,110,134,108,135,104,139,101,140,99,142,96,143,94,144,93,145,90,145,89,147,87,147,87,148,85,148 85,149,86,149,86,150,87,150,88,151,90,151,90,152,92,153,93,154,94,154,96,156,100,158,101,159,109,163,115,163,116,164,118,165,120,165,122,166,125,166 126,167,131,167,131,162 e|********* m157,69 l184,69,185,70,187,70,187,71,188,71,188,79,187,81,186,82,185,85,185,87,183,93,182,95,181,99,180,102,178,105,178,109,176,112,174,118,172,121,169,126 168,128,167,132,165,135,164,138,164,140,163,142,162,145,161,146,161,147,160,149,160,151,159,152,159,153,158,153,158,145 e|********* m171,112 l171,115,173,119,173,121,174,122,175,125,176,127,176,130,178,134,178,136,179,139,180,141,182,147,182,158,184,160,184,156 e|********* m185,129 l189,133,190,133,191,135,198,135,200,136,206,136,206,134,207,133 e|********* m253,55 l253,68,252,70,252,75,250,77,250,79,248,83,247,84,247,88,246,89,246,94,253,94,254,93,254,92,257,92,259,91,260,90,263,90,265,89,266,89,268,88 282,88 e|********* m233,115 l242,115,245,114,247,112,251,112,254,111,256,110,259,109,261,109,262,108,266,106,267,106,268,105,270,105,270,104 e|********* m232,131 l237,131,239,129,241,129,244,128,246,127,247,126,250,126,252,125,255,124,257,123,260,122,264,120,267,120,271,118,272,117,274,117,275,116,276,116,276,115,277,115 277,114,276,113,275,113 e|********* m260,110 l260,141,261,144,263,148,264,151,264,153,265,155,267,158,267,163,268,165,269,166,270,166,270,165,271,164,271,163,274,160,274,159,276,157,277,154,279,153,279,151 284,146,284,144,287,141,287,139,289,137 e|********* m282,82 l301,82,304,81,312,81,324,78,330,75,340,73,350,69,355,68,359,67,364,65,367,63,370,63,372,62,375,61,376,60,377,60,377,59,374,59 e|********* m324,60 l324,96 e|********* m345,44 l345,71,344,73,343,74,342,77,342,78,341,80,341,83,340,85,338,87,337,89,335,91,333,92,332,94,329,95,327,97,324,97,322,98,319,99,316,101,313,101 310,102,308,103,305,104,303,104,299,106,293,106,293,103,295,103,295,102,300,102,302,101,304,101,306,100,310,99,319,96,323,95,326,94,330,93,333,93,335,91 337,90,340,90,341,89,341,90,340,90,340,92,338,93,336,95,335,97,333,100,333,101,331,104,330,105,329,107,327,109,327,110,325,112,325,114,324,117,323,119 323,121,321,125,320,128,319,130,317,136,317,150,316,151,316,150,318,146,318,144,319,142,319,138,321,134,321,132,322,130,323,129,324,126,324,125,325,123,326,122 326,120,327,119,327,118,328,117,329,117,329,115,331,115,331,114,342,114,343,115,344,115,345,116,345,118,346,119,346,124,347,126,347,147,346,148,346,149,345,150 345,151,344,151,344,152,343,153,343,154,342,154,342,155,339,155,339,154,338,154,338,153,337,153,337,152,336,152,335,151,334,151,333,150,332,150,331,149,330,149 329,148,328,148,324,144,324,142,323,142,323,138,324,138,325,137,326,137,326,136,328,136,328,135,330,135,330,134,331,134,332,133,339,133,339,139,338,139,338,140 337,140,337,141,335,141,335,142,334,142,333,143,332,143,332,144,330,144,328,146,327,146,327,147,325,147,325,148,324,148,324,149,323,150,323,151,321,151,321,152 320,152,320,153,316,153,316,154,336,154 e[/whitepad]

稍稍 动手  就可以啊！！不用卖成品 啊   外壳 是电脑电源壳子   在旧摊 淘了个 50MA 的电流表  一个3 W 22K 的 可调电阻  就OK 了  串接一下！！！
  我是 搞电子的    。。

一个万用表就全搞定了。

dddddddddddddddddddddddddddddd
ddddddddddddddddddddddddddddddddddddddddd

我也想做一个，有没有电路图。万分感激
。

真笨用欧姆定律就可以搞定

NB任务啊，值得学习！

不错，做的精致点就改好了。