{"id":251,"date":"2026-01-29T08:05:57","date_gmt":"2026-01-29T00:05:57","guid":{"rendered":"https:\/\/gccircuit.com\/wordpress\/?p=251"},"modified":"2026-01-29T08:05:58","modified_gmt":"2026-01-29T00:05:58","slug":"12-volt-30-amp-%e9%9b%bb%e6%ba%90%e4%be%9b%e6%87%89%e5%99%a8","status":"publish","type":"post","link":"https:\/\/gccircuit.com\/wordpress\/2026\/01\/29\/12-volt-30-amp-%e9%9b%bb%e6%ba%90%e4%be%9b%e6%87%89%e5%99%a8\/","title":{"rendered":"12 Volt 30 Amp \u96fb\u6e90\u4f9b\u61c9\u5668"},"content":{"rendered":"\n<p>\u4f7f\u7528\u55ae\u4e00\u7684 7812 \u7a69\u58d3IC\u4ee5\u53ca\uf969\u500b\u8f38\u51fa\u529f\uf961\u6676\u9ad4\uf92d\u7d44\u6210\uff0c\u9019\u500b\u96fb\uf937\u53ef\u4ee5\u9a45\u52d5\u7684\u8ca0\u8f09\u8f38\u51fa\u96fb\uf9ca\u905430A\uff0c\u96fb\uf937\u5716\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"598\" src=\"https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-85.png\" alt=\"\" class=\"wp-image-252\" srcset=\"https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-85.png 1000w, https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-85-300x179.png 300w, https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-85-768x459.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p>\u5176\u5be6\u8b8a\u58d3\u5668\u53ef\u80fd\u662f\u9019\u500b\u96fb\uf937\u4e2d\u6210\u672c\u6700\u9ad8\u7684\uf9b2\u4ef6\uff0c\uf967\u5982\u76f4\u63a5\u627e\u500b12V\u7684\uf902\u7528\u96fb\u6c60\uf92d\u7372\u5f97DC12V\uff0c\u4f46\u53ef\u80fd\u5728\u6709\u4e9b\u7528\u9014\u4e2d\u4f60\u662f\u5fc5\u9808\u4f7f\u7528\u9019\u500b\u96fb\uf937\u7684\uff0c\uf9b5\u5982\u8ecd\u7528\uf902\u4e0a\u5e38\u4f7f\u752824V\u7684\u96fb\u6c60\uf92d\u4f9b\u96fb\uff0c\u5982\u679c\u8981\u4f7f\u752812V\u7684\u8a2d\u5099\u7684\u8a71\u5c31\u8981\u4f7f\u7528\u672c\u96fb\uf937\uf9ba\u3002\u5982\u679c\u9700\u8981\u7684\u96fb\uf9ca\u5f88\u5927\u7684\u8a71\uff0c\u8b8a\u58d3\u5668\u6b21\u7d1a\u6240\u7528\u7684\u6574\uf9ca\u5668\u4e00\u5b9a\u8981\u627e\u9ad8\u96fb\uf9ca\u7684\uff0c\u6700\u597d\u662f100A\u6216\u4ee5\u4e0a\u7684\u8010\u96fb\uf9ca\u3002LM7812\u4e0a\u6240\u7d93\u904e\u7684\u96fb\uf9ca\u5c07\u53ea\u67091A\u6216\u6bd4\u8f38\u51fa\u96fb\uf9ca\uf901\u4f4e\uff0c\u5176\u9918\u984d\u5916\u7684\u8f38\u51fa\u96fb\uf9ca\u5fc5\u9808\u4ef0\u8cf4\u5176\u4ed6\u5916\u63a5\u7684\u529f\uf961\u6676\u9ad4\uff0c\u8a2d\u8a08\u96fb\uf937\u6642\u9810\u4f30\u4f7f\u752830A\u7684\u96fb\uf9ca\uff0c\u4f7f\u75286\u500bTIP2955\u529f\uf961\u6676\u9ad4\u63a1\u7528\u4f75\uf997\u7684\u65b9\u5f0f\uf92d\u8ca0\u64d4\u9019\u9ebc\u5927\u7684\u96fb\uf9ca\uff0c\u96d6\u7136\u6bcf\u500b\u6676\u9ad4\u5206\u914d\uf9ba1\/6\u7684\u8f38\u51fa\u96fb\uf9ca\uff0c\u4f46\u6563\u71b1\u5668\u9084\u662f\u9700\u8981\u7684\uff0c\u7576\u8f38\u51fa\u96fb\uf9ca\u6700\u9ad8\u6642\uff0c\u5176\u7522\u751f\u7684\u71b1\ufa01\u662f\u975e\u5e38\u9ad8\u7684\uff0c\u6240\u4ee5\u5728\u8a2d\u8a08\u4e0a\u6700\u597d\u8003\uf97e\u4f7f\u7528\u98a8\u6247\u6216\u662f\u6c34\uf92e\u7684\u65b9\u5f0f\uf92d\u6563\u71b1\u3002\u7576\u529f\uf961\u6676\u9ad4\u640d\u58de\u6642\uff0c\u7a69\u58d3IC\u52e2\u5fc5\u4f9b\u61c9\u5168\u8ca0\u8f09\u7684\u96fb\uf9ca\uff0c\u751a\u81f3\u767c\u751f\u5371\u96aa\uff0c\u6240\u4ee5\u7a69\u58d3IC\u8f38\u51fa\u7aef\u76841A\u4fdd\u96aa\u7d72\u5373\u53ef\u4fdd\u8b77\u6b64IC\uff0cReload\u6240\u4f7f\u7528\u7684400\u03a9\u662f\u7528\u65bc\u6e2c\u8a66\u6642\u4f7f\u7528\u7684\uff0c\u6700\u5f8c\u5b8c\u6210\u7684\u96fb\uf937\u662f\uf967\u9700\u8981\u5b83\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u6a21\u64ec\u529f\u80fd\u7684\u6e2c\u8a66\u5716\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"712\" height=\"585\" src=\"https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-86.png\" alt=\"\" class=\"wp-image-253\" srcset=\"https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-86.png 712w, https:\/\/gccircuit.com\/wordpress\/wp-content\/uploads\/2026\/01\/image-86-300x246.png 300w\" sizes=\"auto, (max-width: 712px) 100vw, 712px\" \/><\/figure>\n\n\n\n<p>\u9019\u500b\u96fb\uf937\u662f\u4e00\u500b\u5f88\u597d\u7684\u96fb\u58d3\/\u96fb\uf9ca\u6cd5\u5247\u7bc4\uf9b5\uff0c\u6574\u9ad4\uf92d\uf96f\uff0c\u8f38\u5165\u7684\u96fb\uf9ca\u7e3d\u5408\uff0c\u5fc5\u9808\u7b49\u65bc\u8f38\u51fa\u96fb\uf9ca\u7684\u7e3d\u5408\uff0c\u800c\u4e14\u74b0\uf937\u96fb\u58d3\u61c9\u8a72\u7b49\u65bc\uf9b2\uff0c\uf9b5\u5982\u4e0a\u5716\uff0c\u8f38\u5165\u96fb\u58d3\u70ba24V\uff0c\u5728R7\u4e0a\u7684\u58d3\ufa09\u70ba4V\uff0c\u7a69\u58d3IC\u7684\u8f38\u5165\u7aef\u96fb\u58d3\u70ba20V\uff0c24V-4V-20V=0\u3002\u8f38\u51fa\u7aef\uff0c\u7e3d\u8f38\u51fa\u96fb\uf9ca\u70ba30A\uff0c\u7a69\u58d3IC\u63d0\u4f9b\uf9ba0.866A\u7684\u96fb\uf9ca\u8f38\u51fa\uff0c\u6bcf\u4e00\u500b\u529f\uf961\u6676\u9ad4\u63d0\u4f9b\uf9ba4.855A\u7684\u96fb\uf9ca\u8f38\u51fa\uff0c30 = 6 * 4.855 + 0.866.\uff0c\u6bcf\u500b\u529f\uf961\u6676\u9ad4\u8ca0\u64d4\u7d044.86A\u7684\u96fb\uf9ca\uff0c\u6bcf\u500b\u6676\u9ad4\u7684\u57fa\u6975\u96fb\uf9ca\u7d04138mA\uff0c\u6bcf\u500b\u6676\u9ad4\u9808\u670935\u500d\u7684\u96fb\uf9ca\u589e\ufa17\u624d\u8db3\u4ee5\u8f38\u51fa6A\u7684\u529f\uf961\uff0cTIP2955\u8db3\u4ee5\u6eff\u8db3\u4e0a\u8ff0\u8981\u6c42\uff0cR1~R6\u96fb\u963b\u662f\u9810\u9632\u96fb\u6676\u9ad4\u56e0\u88fd\u9020\u6642\u653e\u5927\uf961\u7121\u6cd5\u5b8c\u5168\u76f8\u540c\u6642\u6240\u7522\u751f\u7684\u96fb\uf9ca\uf967\u5e73\u8861\uff0cR7 100\u03a9\u9650\u5236\u6700\u5927\u8f38\u51fa\u6642\u5728\u672c\u8eab\u7684\u58d3\ufa09\u70ba4V\uff0c\u96fb\uf98a\u6d88\u8017\u7d04(4^2)\/200 \u6216\u7d04\u70ba160 mW\uff0c\u5efa\u8b70\u4f7f\u75280.5W\u4ee5\u4e0a\u7684R7\u96fb\u963b\u3002\u9032\u5165\u7a69\u58d3\u96fb\uf937\u7684\u96fb\uf9ca\u662f\u7531\u529f\uf961\u6676\u9ad4\u7684\u5c04\u6975\u8f38\u5165\uff0c\u57fa\u6975\u7684\u8abf\u5236\uff0c\u518d\u4e00\u6b21\u904b\u7528Kirchoff&#8217;s\u96fb\uf9ca\u6cd5\u5247\uff0c\u7a69\u58d3IC\u7684\u8f38\u5165\u96fb\uf9ca871mA\uff0c\u5b83\u7684\u6e90\uf9ca\u65bc\uf9ca\u7d93R7 100\u03a9\u768440.3mA\uff0c871.18 = 40.3 + 830. 88.\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528\u55ae\u4e00\u7684 7812 \u7a69\u58d3IC\u4ee5\u53ca\uf969\u500b\u8f38\u51fa\u529f\uf961\u6676\u9ad4\uf92d\u7d44\u6210\uff0c\u9019\u500b\u96fb\uf937\u53ef\u4ee5\u9a45\u52d5\u7684\u8ca0\u8f09\u8f38\u51fa\u96fb\uf9ca\u905430A\uff0c\u96fb\uf937\u5716\u5982\u4e0b\uff1a &#8230; <a title=\"12 Volt 30 Amp \u96fb\u6e90\u4f9b\u61c9\u5668\" class=\"read-more\" href=\"https:\/\/gccircuit.com\/wordpress\/2026\/01\/29\/12-volt-30-amp-%e9%9b%bb%e6%ba%90%e4%be%9b%e6%87%89%e5%99%a8\/\" aria-label=\"Read more about 12 Volt 30 Amp \u96fb\u6e90\u4f9b\u61c9\u5668\">\u95b1\u8b80\u5168\u6587<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-251","post","type-post","status-publish","format-standard","hentry","category-6"],"_links":{"self":[{"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/posts\/251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/comments?post=251"}],"version-history":[{"count":1,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/posts\/251\/revisions"}],"predecessor-version":[{"id":254,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/posts\/251\/revisions\/254"}],"wp:attachment":[{"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/media?parent=251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/categories?post=251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gccircuit.com\/wordpress\/wp-json\/wp\/v2\/tags?post=251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}