手持灯牌的问题，都来踩一下
儿子要过生日，所以做了个生日牌灯牌，单接白灯是亮的，单接红灯也是亮的，但把红灯和白灯并联在一起后只有红灯亮，急人啊，听说要降压什么的。。。大家交流一下啊 红灯前要串电阻哦！{:1_1:} 红灯前要串电阻哦！{:1_1:}dingfengkeji 发表于 2009-8-12 13:00 http://www.521led.com/images/common/back.gif
怎么算要串多少电阻？ 灯接的是220V的吗？手持220V危险哦！
建议楼主改成12V直流的，3个一组串联，每组再串一个电阻限流，红灯串300欧姆，白灯串220欧姆 简单说就是6个红的接一个小电阻4个白的接一个电阻然后接12V控制器就QK了 电池要达到12V看电池皮上有说明 本人是按照网上的教程，每个LED都是串联的，电阻如何加啊 本人是按照网上的教程，每个LED都是串联的，电阻如何加啊 ***400;200;400,200;;** m172,16 l172,18,171,19,169,20,168,21,166,22,165,23,163,24,161,26,159,26,157,28,157,29,156,29,156,30,154,30,154,31,153,32,151,33,150,34,148,35,147,36 145,37,144,38,142,39,141,40,139,41,139,42,135,46,133,47,132,48,130,48,129,49,129,50,127,50,127,51,124,52,121,55,120,55,118,57,117,57,116,58 115,58,116,59,116,60,117,61,118,64,119,64,119,65,121,67,122,69,123,70,124,72,124,73,125,73,126,75,127,76,128,78,129,79,130,81,130,82,131,82 131,83,133,85,133,86,138,91,138,92,140,94,141,96,142,97,142,98,144,100,144,101,145,102,145,103,147,105,147,106,149,108,149,109,150,109,152,111,153,113 154,114,154,115,156,117,156,119,157,119,159,121,159,122,160,123,161,125,162,126,163,128,164,129,164,131,165,131,167,133,167,134,168,135,169,137,170,138,170,140 171,140,172,141,173,143,174,144,175,146,176,147,176,148,177,149,178,151,180,153,181,155,182,156,182,158,183,158,184,159,185,161,186,162 e|********* m115,59 l115,64,114,64,114,66,113,67,113,71,112,72,112,74,111,74,111,77,110,77,110,80,109,80,109,83,108,83,108,86,107,86,107,87,106,87,106,89,105,89 105,92,106,93,106,95,107,95,107,98,108,99,108,101,109,101,109,104,110,104,110,106,112,108,114,109,115,110,119,112,121,114,123,115,123,116,125,118,125,119 127,121,127,122,129,124,129,125,132,128,132,129,134,131,134,132,136,134,136,135,137,136,137,137,138,137,138,138,140,140,140,141,141,142,141,143,142,144,142,145 143,146,143,147,145,149,145,150,147,152,147,153,149,155,149,156,151,158,151,159,153,161,153,162,154,163,155,163,156,164,158,165,158,167,159,167,159,168,161,170 161,172,162,173,162,176,163,176,163,178,164,179,164,180,166,182,166,183,168,185,168,186,169,188,171,190,171,193,172,194,172,195,173,197,173,198,175,197 e|********* m183,160 l184,160,184,162,185,163,185,165,188,168,188,169,190,171,190,172,192,174,192,175,195,178,195,179,196,179,196,180,197,181,197,182,198,182,198,183,200,185,200,186 201,187,201,188,202,188,202,190,203,190,203,191,204,191,205,193,205,195,206,195,208,197,208,199,209,199 e|********* m173,17 l173,19,174,20,174,22,176,25,176,27,178,29,179,31,179,32,180,33,180,34,181,34,181,35,183,37,183,38,186,41,186,43,187,43,187,44,188,45,188,49 189,49,189,50,191,52,191,55,194,58,194,59,195,61,196,61,197,62,197,63,199,65,199,67,200,68,201,68,201,69,203,71,203,72,204,74,206,76,207,78 208,79,208,80,209,81,209,82,212,85,213,87,216,90,216,91,218,93,219,95,220,96,220,98,221,98,222,99,222,101,226,105,227,107,231,111,232,111,239,118 240,120,241,121,241,122,244,125,244,127,245,127,246,128,246,129,247,129,247,130,248,131,248,132,251,135,251,136,253,138,253,141,254,141,254,143,255,144,255,145 257,147,257,148,260,151,260,153,261,153,262,154,262,156,263,156,264,157,264,158,265,159,265,160,266,160,266,161,269,164,269,166,270,167,271,169,274,173,282,181 286,187,289,192,290,193,291,195,292,196,293,198,294,199 e 初中二年级都会的问题，用欧姆定律套， 手持灯 用电池 当然是并联了
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