怎样把交流电（1.5V）变成直流电（1.5V）？要和干电池一样纯，最好能提供电路图，先谢谢各位了 用1.5V的干电池三颗接为4.5V.请问如何才能 转变为准确...
\u600e\u6837\u628a50HZ\u7684\u5de5\u9891\u4ea4\u6d41\u7535\u53d8\u621030KHZ\u7684\u9ad8\u9891\u4ea4\u6d41\u7535\uff0c\u6700\u597d\u80fd\u63d0\u4f9b\u7535\u8def\u56fe\uff0c\u8c22\u8c22\uff01\u53d8\u9891\u5668
\u3000\u3000\uff08frequency changer / frequency converter\uff09\u662f\u4e00\u79cd\u7528\u6765\u6539\u53d8\u4ea4\u6d41\u7535\u9891\u7387\u7684\u7535\u6c14\u8bbe\u5907\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u5177\u6709\u6539\u53d8\u4ea4\u6d41\u7535\u7535\u538b\u7684\u8f85\u52a9\u529f\u80fd\u3002
\u3000\u3000\u8fc7\u53bb\uff0c\u53d8\u9891\u5668\u4e00\u822c\u88ab\u5305\u542b\u5728\u7535\u52a8\u53d1\u7535\u673a\u3001\u65cb\u8f6c\u8f6c\u6362\u5668\u7b49\u7535\u6c14\u8bbe\u5907\u4e2d\u3002\u968f\u7740\u534a\u5bfc\u4f53\u7535\u5b50\u8bbe\u5907\u7684\u51fa\u73b0\uff0c\u4eba\u4eec\u5df2\u7ecf\u53ef\u4ee5\u751f\u4ea7\u5b8c\u5168\u72ec\u7acb\u7684\u53d8\u9891\u5668\u3002
\u3000\u3000
\u53d8\u9891\u5668\u4e3b\u7535\u8def\u56fe (\u89c1\u56fe)
\u53d8\u9891\u5668\u901a\u5e38\u5305\u542b3\u4e2a\u7ec4\u6210\u90e8\u5206\uff1a\u6574\u6d41\u5668\uff08rectifier\uff09\u548c\u9006\u53d8\u5668\uff08Inverter\uff09,\u8fd8\u6709\u76f4\u6d41\u90e8\u5206(DC )\u3002\u5176\u4e2d\uff0c\u6574\u6d41\u5668\u5c06\u8f93\u5165\u7684\u4ea4\u6d41\u7535\u8f6c\u6362\u4e3a\u76f4\u6d41\u7535\uff0c\u9006\u53d8\u5668\u5c06\u76f4\u6d41\u7535\u518d\u8f6c\u6362\u6210\u6240\u9700\u9891\u7387\u7684\u4ea4\u6d41\u7535\u3002\u9664\u4e86\u8fd92\u4e2a\u90e8\u5206\u4e4b\u5916\uff0c\u53d8\u9891\u5668\u8fd8\u6709\u53ef\u80fd\u5305\u542b\u53d8\u538b\u5668\u548c\u7535\u6c60\u3002\u5176\u4e2d\uff0c\u53d8\u538b\u5668\u7528\u6765\u6539\u53d8\u7535\u538b\u5e76\u53ef\u4ee5\u9694\u79bb\u8f93\u5165/\u8f93\u51fa\u7684\u7535\u8def\uff0c\u7535\u6c60\u7528\u6765\u8865\u507f\u53d8\u9891\u5668\u5185\u90e8\u7ebf\u8def\u4e0a\u7684\u80fd\u91cf\u635f\u5931\u3002
\u3000\u3000\u4e0d\u540c\u7684\u53d8\u9891\u5668\u80fd\u591f\u5904\u7406\u7684\u7535\u6e90\u529f\u7387\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4ece\u51e0\u74e6\u5230\u51e0\u5146\u74e6\u90fd\u6709\u3002
\u53d8\u9891\u5668\u539f\u7406\u4ee5\u53ca\u57fa\u672c\u77e5\u8bc6
\u3000\u30001\u3001\u4ec0\u4e48\u662f\u53d8\u9891\u5668\uff1f
\u3000\u3000\u53d8\u9891\u5668\u662f\u5229\u7528\u7535\u529b\u534a\u5bfc\u4f53\u5668\u4ef6\u7684\u901a\u65ad\u4f5c\u7528\u5c06\u5de5\u9891\u7535\u6e90\u53d8\u6362\u4e3a\u53e6\u4e00\u9891\u7387\u7684\u7535\u80fd\u63a7\u5236\u88c5\u7f6e\u3002
\u3000\u30002\u3001PWM\u548cPAM\u7684\u4e0d\u540c\u70b9\u662f\u4ec0\u4e48\uff1f
\u3000\u3000PWM\u662f\u82f1\u6587Pulse Width Modulation(\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236)\u7f29\u5199\uff0c\u6309\u4e00\u5b9a\u89c4\u5f8b\u6539\u53d8\u8109\u51b2\u5217\u7684\u8109\u51b2\u5bbd\u5ea6\uff0c\u4ee5\u8c03\u8282\u8f93\u51fa\u91cf\u548c\u6ce2\u5f62\u7684\u4e00\u79cd\u8c03\u503c\u65b9\u5f0f\u3002
\u3000\u3000PAM\u662f\u82f1\u6587Pulse Amplitude Modulation (\u8109\u51b2\u5e45\u5ea6\u8c03\u5236) \u7f29\u5199\uff0c\u662f\u6309\u4e00\u5b9a\u89c4\u5f8b\u6539\u53d8\u8109\u51b2\u5217\u7684\u8109\u51b2\u5e45\u5ea6\uff0c\u4ee5\u8c03\u8282\u8f93\u51fa\u91cf\u503c\u548c\u6ce2\u5f62\u7684\u4e00\u79cd\u8c03\u5236\u65b9\u5f0f\u3002
\u3000\u30003\u3001\u7535\u538b\u578b\u4e0e\u7535\u6d41\u578b\u6709\u4ec0\u4e48\u4e0d\u540c\uff1f
\u3000\u3000\u53d8\u9891\u5668\u7684\u4e3b\u7535\u8def\u5927\u4f53\u4e0a\u53ef\u5206\u4e3a\u4e24\u7c7b\uff1a\u7535\u538b\u578b\u662f\u5c06\u7535\u538b\u6e90\u7684\u76f4\u6d41\u53d8\u6362\u4e3a\u4ea4\u6d41\u7684\u53d8\u9891\u5668\uff0c\u76f4\u6d41\u56de\u8def\u7684\u6ee4\u6ce2\u662f\u7535\u5bb9\uff1b\u7535\u6d41\u578b\u662f\u5c06\u7535\u6d41\u6e90\u7684\u76f4\u6d41\u53d8\u6362\u4e3a\u4ea4\u6d41\u7684\u53d8\u9891\u5668\uff0c\u5176\u76f4\u6d41\u56de\u8def\u6ee4\u6ce2\u77f3\u7535\u611f\u3002
\u3000\u30004\u3001\u4e3a\u4ec0\u4e48\u53d8\u9891\u5668\u7684\u7535\u538b\u4e0e\u7535\u6d41\u6210\u6bd4\u4f8b\u7684\u6539\u53d8\uff1f
\u3000\u3000\u5f02\u6b65\u7535\u52a8\u673a\u7684\u8f6c\u77e9\u662f\u7535\u673a\u7684\u78c1\u901a\u4e0e\u8f6c\u5b50\u5185\u6d41\u8fc7\u7535\u6d41\u4e4b\u95f4\u76f8\u4e92\u4f5c\u7528\u800c\u4ea7\u751f\u7684\uff0c\u5728\u989d\u5b9a\u9891\u7387\u4e0b\uff0c\u5982\u679c\u7535\u538b\u4e00\u5b9a\u800c\u53ea\u964d\u4f4e\u9891\u7387\uff0c\u90a3\u4e48\u78c1\u901a\u5c31\u8fc7\u5927\uff0c\u78c1\u56de\u8def\u9971\u548c\uff0c\u4e25\u91cd\u65f6\u5c06\u70e7\u6bc1\u7535\u673a\u3002\u56e0\u6b64\uff0c\u9891\u7387\u4e0e\u7535\u538b\u8981\u6210\u6bd4\u4f8b\u5730\u6539\u53d8\uff0c\u5373\u6539\u53d8\u9891\u7387\u7684\u540c\u65f6\u63a7\u5236\u53d8\u9891\u5668\u8f93\u51fa\u7535\u538b\uff0c\u4f7f\u7535\u52a8\u673a\u7684\u78c1\u901a\u4fdd\u6301\u4e00\u5b9a\uff0c\u907f\u514d\u5f31\u78c1\u548c\u78c1\u9971\u548c\u73b0\u8c61\u7684\u4ea7\u751f\u3002\u8fd9\u79cd\u63a7\u5236\u65b9\u5f0f\u591a\u7528\u4e8e\u98ce\u673a\u3001\u6cf5\u7c7b\u8282\u80fd\u578b\u53d8\u9891\u5668\u3002
\u3000\u30005\u3001\u7535\u52a8\u673a\u4f7f\u7528\u5de5\u9891\u7535\u6e90\u9a71\u52a8\u65f6\uff0c\u7535\u538b\u4e0b\u964d\u5219\u7535\u6d41\u589e\u52a0\uff1b\u5bf9\u4e8e\u53d8\u9891\u5668\u9a71\u52a8\uff0c\u5982\u679c\u9891\u7387\u4e0b\u964d\u65f6\u7535\u538b\u4e5f\u4e0b\u964d\uff0c\u90a3\u4e48\u7535\u6d41\u662f\u5426\u589e\u52a0\uff1f
\u3000\u3000\u9891\u7387\u4e0b\u964d\uff08\u4f4e\u901f\uff09\u65f6,\u5982\u679c\u8f93\u51fa\u76f8\u540c\u7684\u529f\u7387,\u5219\u7535\u6d41\u589e\u52a0,\u4f46\u5728\u8f6c\u77e9\u4e00\u5b9a\u7684\u6761\u4ef6\u4e0b,\u7535\u6d41\u51e0\u4e4e\u4e0d\u53d8\u3002
\u3000\u30006\u3001\u91c7\u7528\u53d8\u9891\u5668\u8fd0\u8f6c\u65f6\uff0c\u7535\u673a\u7684\u8d77\u52a8\u7535\u6d41\u3001\u8d77\u52a8\u8f6c\u77e9\u600e\u6837\uff1f
\u3000\u3000\u91c7\u7528\u53d8\u9891\u5668\u8fd0\u8f6c\uff0c\u968f\u7740\u7535\u673a\u7684\u52a0\u901f\u76f8\u5e94\u63d0\u9ad8\u9891\u7387\u548c\u7535\u538b\uff0c\u8d77\u52a8\u7535\u6d41\u88ab\u9650\u5236\u5728150%\u989d\u5b9a\u7535\u6d41\u4ee5\u4e0b(\u6839\u636e\u673a\u79cd\u4e0d\u540c\uff0c\u4e3a125%~200%)\u3002\u7528\u5de5\u9891\u7535\u6e90\u76f4\u63a5\u8d77\u52a8\u65f6\uff0c\u8d77\u52a8\u7535\u6d41\u4e3a6~7\u500d\uff0c\u56e0\u6b64\uff0c\u5c06\u4ea7\u751f\u673a\u68b0\u7535\u6c14\u4e0a\u7684\u51b2\u51fb\u3002\u91c7\u7528\u53d8\u9891\u5668\u4f20\u52a8\u53ef\u4ee5\u5e73\u6ed1\u5730\u8d77\u52a8(\u8d77\u52a8\u65f6\u95f4\u53d8\u957f)\u3002\u8d77\u52a8\u7535\u6d41\u4e3a\u989d\u5b9a\u7535\u6d41\u76841.2~1.5\u500d\uff0c\u8d77\u52a8\u8f6c\u77e9\u4e3a70%~120%\u989d\u5b9a\u8f6c\u77e9\uff1b\u5bf9\u4e8e\u5e26\u6709\u8f6c\u77e9\u81ea\u52a8\u589e\u5f3a\u529f\u80fd\u7684\u53d8\u9891\u5668\uff0c\u8d77\u52a8\u8f6c\u77e9\u4e3a100%\u4ee5\u4e0a\uff0c\u53ef\u4ee5\u5e26\u5168\u8d1f\u8f7d\u8d77\u52a8\u3002
\u3000\u30007\u3001V/f\u6a21\u5f0f\u662f\u4ec0\u4e48\u610f\u601d\uff1f
\u3000\u3000\u9891\u7387\u4e0b\u964d\u65f6\u7535\u538bV\u4e5f\u6210\u6bd4\u4f8b\u4e0b\u964d\uff0c\u8fd9\u4e2a\u95ee\u9898\u5df2\u5728\u56de\u7b544\u8bf4\u660e\u3002V\u4e0ef\u7684\u6bd4\u4f8b\u5173\u7cfb\u662f\u8003\u8651\u4e86\u7535\u673a\u7279\u6027\u800c\u9884\u5148\u51b3\u5b9a\u7684\uff0c\u901a\u5e38\u5728\u63a7\u5236\u5668\u7684\u5b58\u50a8\u88c5\u7f6e\uff08ROM\uff09\u4e2d\u5b58\u6709\u51e0\u79cd\u7279\u6027\uff0c\u53ef\u4ee5\u7528\u5f00\u5173\u6216\u6807\u5ea6\u76d8\u8fdb\u884c\u9009\u62e9
\u3000\u30008\u3001\u6309\u6bd4\u4f8b\u5730\u6539V\u548cf\u65f6\uff0c\u7535\u673a\u7684\u8f6c\u77e9\u5982\u4f55\u53d8\u5316\uff1f
\u3000\u3000\u9891\u7387\u4e0b\u964d\u65f6\u5b8c\u5168\u6210\u6bd4\u4f8b\u5730\u964d\u4f4e\u7535\u538b\uff0c\u90a3\u4e48\u7531\u4e8e\u4ea4\u6d41\u963b\u6297\u53d8\u5c0f\u800c\u76f4\u6d41\u7535\u963b\u4e0d\u53d8\uff0c\u5c06\u9020\u6210\u5728\u4f4e\u901f\u4e0b\u4ea7\u751f\u5730\u8f6c\u77e9\u6709\u51cf\u5c0f\u7684\u503e\u5411\u3002\u56e0\u6b64\uff0c\u5728\u4f4e\u9891\u65f6\u7ed9\u5b9aV/f,\u8981\u4f7f\u8f93\u51fa\u7535\u538b\u63d0\u9ad8\u4e00\u4e9b,\u4ee5\u4fbf\u83b7\u5f97\u4e00\u5b9a\u5730\u8d77\u52a8\u8f6c\u77e9,\u8fd9\u79cd\u8865\u507f\u79f0\u589e\u5f3a\u8d77\u52a8\u3002\u53ef\u4ee5\u91c7\u7528\u5404\u79cd\u65b9\u6cd5\u5b9e\u73b0,\u6709\u81ea\u52a8\u8fdb\u884c\u7684\u65b9\u6cd5\u3001\u9009\u62e9V/f\u6a21\u5f0f\u6216\u8c03\u6574\u7535\u4f4d\u5668\u7b49\u65b9\u6cd5
\u3000\u30009\u3001\u5728\u8bf4\u660e\u4e66\u4e0a\u5199\u7740\u53d8\u901f\u8303\u56f460~6Hz\uff0c\u537310\uff1a1\uff0c\u90a3\u4e48\u57286Hz\u4ee5\u4e0b\u5c31\u6ca1\u6709\u8f93\u51fa\u529f\u7387\u5417\uff1f
\u3000\u3000\u57286Hz\u4ee5\u4e0b\u4ecd\u53ef\u8f93\u51fa\u529f\u7387\uff0c\u4f46\u6839\u636e\u7535\u673a\u6e29\u5347\u548c\u8d77\u52a8\u8f6c\u77e9\u7684\u5927\u5c0f\u7b49\u6761\u4ef6\uff0c\u6700\u4f4e\u4f7f\u7528\u9891\u7387\u53d66Hz\u5de6\u53f3\uff0c\u6b64\u65f6\u7535\u52a8\u673a\u53ef\u8f93\u51fa\u989d\u5b9a\u8f6c\u77e9\u800c\u4e0d\u4f1a\u5f15\u8d77\u4e25\u91cd\u7684\u53d1\u70ed\u95ee\u9898\u3002\u53d8\u9891\u5668\u5b9e\u9645\u8f93\u51fa\u9891\u7387\uff08\u8d77\u52a8\u9891\u7387\uff09\u6839\u636e\u673a\u79cd\u4e3a0.5~3Hz.
\u3000\u300010\u3001\u5bf9\u4e8e\u4e00\u822c\u7535\u673a\u7684\u7ec4\u5408\u662f\u572860Hz\u4ee5\u4e0a\u4e5f\u8981\u6c42\u8f6c\u77e9\u4e00\u5b9a\uff0c\u662f\u5426\u53ef\u4ee5\uff1f
\u3000\u3000\u901a\u5e38\u60c5\u51b5\u4e0b\u65f6\u4e0d\u53ef\u4ee5\u7684\u3002\u572860Hz\u4ee5\u4e0a\uff08\u4e5f\u670950Hz\u4ee5\u4e0a\u7684\u6a21\u5f0f\uff09\u7535\u538b\u4e0d\u53d8\uff0c\u5927\u4f53\u4e3a\u6052\u529f\u7387\u7279\u6027\uff0c\u5728 \u9ad8\u901f\u4e0b\u8981\u6c42\u76f8\u540c\u8f6c\u77e9\u65f6\uff0c\u5fc5\u987b\u6ce8\u610f\u7535\u673a\u4e0e\u53d8\u9891\u5668\u5bb9\u91cf\u7684\u9009\u62e9\u3002
\u3000\u300011\u3001\u6240\u8c13\u5f00\u73af\u662f\u4ec0\u4e48\u610f\u601d\uff1f
\u3000\u3000\u7ed9\u6240\u4f7f\u7528\u7684\u7535\u673a\u88c5\u7f6e\u8bbe\u901f\u5ea6\u68c0\u51fa\u5668\uff08PG\uff09\uff0c\u5c06\u5b9e\u9645\u8f6c\u901f\u53cd\u9988\u7ed9\u63a7\u5236\u88c5\u7f6e\u8fdb\u884c\u63a7\u5236\u7684\uff0c\u79f0\u4e3a\u201c\u95ed\u73af \u201d\uff0c\u4e0d\u7528PG\u8fd0\u8f6c\u7684\u5c31\u53eb\u4f5c\u201c\u5f00\u73af\u201d\u3002\u901a\u7528\u53d8\u9891\u5668\u591a\u4e3a\u5f00\u73af\u65b9\u5f0f\uff0c\u4e5f\u6709\u7684\u673a\u79cd\u5229\u7528\u9009\u4ef6\u53ef\u8fdb\u884cPG\u53cd\u9988.
\u3000\u300012\u3001\u5b9e\u9645\u8f6c\u901f\u5bf9\u4e8e\u7ed9\u5b9a\u901f\u5ea6\u6709\u504f\u5dee\u65f6\u5982\u4f55\u529e\uff1f
\u3000\u3000\u5f00\u73af\u65f6\uff0c\u53d8\u9891\u5668\u5373\u4f7f\u8f93\u51fa\u7ed9\u5b9a\u9891\u7387\uff0c\u7535\u673a\u5728\u5e26\u8d1f\u8f7d\u8fd0\u884c\u65f6\uff0c\u7535\u673a\u7684\u8f6c\u901f\u5728\u989d\u5b9a\u8f6c\u5dee\u7387\u7684\u8303\u56f4\u5185\uff081%~5%\uff09\u53d8\u52a8\u3002\u5bf9\u4e8e\u8981\u6c42\u8c03\u901f\u7cbe\u5ea6\u6bd4\u8f83\u9ad8\uff0c\u5373\u4f7f\u8d1f\u8f7d\u53d8\u52a8\u4e5f\u8981\u6c42\u5728\u8fd1\u4e8e\u7ed9\u5b9a\u901f\u5ea6\u4e0b\u8fd0\u8f6c\u7684\u573a\u5408\uff0c\u53ef\u91c7\u7528\u5177\u6709PG\u53cd\u9988\u529f\u80fd\u7684\u53d8\u9891\u5668\uff08\u9009\u7528\u4ef6\uff09\u3002
\u3000\u300013\u3001\u5982\u679c\u7528\u5e26\u6709PG\u7684\u7535\u673a\uff0c\u8fdb\u884c\u53cd\u9988\u540e\u901f\u5ea6\u7cbe\u5ea6\u80fd\u63d0\u9ad8\u5417\uff1f
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\u3000\u300018\u3001\u8bf7\u8bf4\u660e\u53d8\u9891\u5668\u7684\u4fdd\u62a4\u529f\u80fd?
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\u3000\u3000(3) \u4ea7\u751f\u8f74\u627f\u7684\u5bff\u547d\u95ee\u9898\uff0c\u8981\u5145\u5206\u52a0\u4ee5\u8003\u8651\u3002
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\u3000\u3000\u8f85\u52a9\u7ed5\u7ec4\uff1b\u5bf9\u4e8e\u7535\u5bb9\u8d77\u52a8\u6216\u7535\u5bb9\u8fd0\u8f6c\u65b9\u5f0f\u7684\uff0c\u5c06\u8bf1\u53d1\u7535\u5bb9\u5668\u7206\u70b8\u3002\u53d8\u9891\u5668\u7684\u7535\u6e90\u901a\u5e38\u4e3a3\u76f8\uff0c\u4f46\u5bf9\u4e8e\u5c0f\u5bb9\u91cf\u7684\uff0c\u4e5f\u6709\u7528\u5355\u76f8\u7535\u6e90\u8fd0\u8f6c\u7684\u673a\u79cd\u3002
\u3000\u300027\u3001\u53d8\u9891\u5668\u672c\u8eab\u6d88\u8017\u7684\u529f\u7387\u6709\u591a\u5c11\uff1f
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\u3000\u300033\u3001\u6ee4\u6ce2\u7535\u5bb9\u5668\u4e3a\u6d88\u8017\u54c1\uff0c\u90a3\u4e48\u600e\u6837\u5224\u65ad\u5b83\u7684\u5bff\u547d\uff1f
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\u3000\u300034\u3001\u88c5\u8bbe\u53d8\u9891\u5668\u65f6\u5b89\u88c5\u65b9\u5411\u662f\u5426\u6709\u9650\u5236\u3002
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\u3000\u3000\uff081\uff09\u76d8\u7684\u8bbe\u8ba1\u8981\u9488\u5bf9\u5b9e\u9645\u88c5\u7f6e\u6240\u9700\u8981\u7684\u6563\u70ed\uff1b
\u3000\u3000\uff082\uff09\u5229\u7528\u94dd\u6563\u70ed\u7247\u3001\u7ffc\u7247\u51b7\u5374\u5242\u7b49\u589e\u52a0\u51b7\u5374\u9762\u79ef\uff1b
\u3000\u3000\uff083\uff09 \u91c7\u7528\u70ed\u5bfc\u7ba1\u3002
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\u63a8\u8350\u4f7f\u7528\u8f93\u51fa\u53ef\u8c03\u7684DC/DC\u76f4\u6d41\u53d8\u6362\u6a21\u5757\uff0c\u975e\u5e38\u6700\u65b9\u4fbf\uff0c\u6dd8\u5b9d\u7f51\u4e0a\u6709\u5f88\u591a\u578b\u53f7\u53ef\u9009\uff0c\u7ecf\u6d4e\u9002\u7528\uff0c\u6548\u679c\u8fdc\u8fdc\u597d\u4e8e\u81ea\u5df1\u5236\u4f5c\u3002\u8fd9\u6837\u5373\u4f7f\u5728\u7535\u6c60\u4f7f\u7528\u4e00\u6bb5\u65f6\u95f4\u540e\u7535\u538b\u4e0b\u964d\u7684\u60c5\u51b5\u4e0b\uff0c\u8f93\u51fa\u7535\u538b\u4e5f\u53ef\u4ee5\u7a33\u5b9a\u57283.7V\u3002
DC （3V＋1.4）/1.414= AC 3.111V只要你的交流代电不大于3.111V就可以经过全桥整流得到不高于3V的DC直流电压，电流的大小取决于交流电源的输出电流。
220V转3V 0.3W 变压器一个
1N4001 二极管4个
4700uF/16V电容2个
470uF/16V电容2个
0.01uF电容2个
不可能
二级管压降0。6v
桥式只能变成0。3v
如此低电压只能使用同步整流，不过电路十分复杂。大概50-100个元件
假如3v交流可以桥式整流成1。5直流
楼上都是空想主义
假如电流很小 用一个肖射基二极管半波整流勉强可以用（1。1v）
1。2v桥式整流压降
稳压ic至少0.3v，一般2v左右
用ldo 交流3.3v
普通如lm317 交流最好能有5v以上
80ma可以考虑用和泰的ldo
整流就能使交流变直流。但是想和干电池一样纯就难了。
电路较多。一般是四个二极管组成整流桥，加滤波电容。
你可能是在哪个电器上下了一个变压器，这样的小变压器插在家庭电路上输出的是交流电就是不分正负极的只能使灯泡发光而不能带动其它电器，要变成直流电需要添加一个元件，你如果细心就会发现：有的变压器与耗电器中间的那段电路上还连有一个小电板，就是它了！
要很纯,要是不可能的，~1.5变变成-1.5整流就行了，在百度搜一下桥式整流就行了.
加是个二级管组成整流桥，和滤波电容，但是电压会偏小，因为二级管损耗了一点压降
绛旓細鍙浣犵殑浜ゆ祦浠ｇ數涓嶅ぇ浜3.111V灏卞彲浠ョ粡杩囧叏妗ユ暣娴佸緱鍒颁笉楂樹簬3V鐨凞C鐩存祦鐢靛帇锛岀數娴佺殑澶у皬鍙栧喅浜庝氦娴佺數婧愮殑杈撳嚭鐢垫祦銆220V杞3V 0.3W 鍙樺帇鍣ㄤ竴涓 1N4001 浜屾瀬绠4涓 4700uF/16V鐢靛2涓 470uF/16V鐢靛2涓 0.01uF鐢靛2涓
绛旓細鍏堢敤鍙樺帇鍣ㄥ彉涓17.5V宸﹀彸鐨勪氦娴佺數锛屽啀鏁存祦锛屽啀鐢↙M317锛岀粨鍚堢數浣嶈鍙疄鐜1.5V~15V鑼冨洿鍐呯殑璋冨帇锛岀ǔ瀹氬害鍙揪0.1%宸﹀彸銆侺M317涔熸槸涓夌绋冲帇鍣紝鍏蜂綋璧勬枡缃戜笂鏌ヨ銆
绛旓細鍥炵瓟锛氬叿浣撶殑鐢佃矾?3.1.1璁捐鐩殑鍙婁换鍔 璁捐鐩殑:鐞嗚В鐩存祦绋冲帇鐢垫簮鍚勯儴鍒嗙殑宸ヤ綔鍘熺悊鍙婁綔鐢;鐔熸倝甯歌鐨勭嚎鎬ч泦鎴愮ǔ鍘嬬數婧愯姱鐗囥 璁捐浠诲姟:璁捐涓涓浜ゆ祦杈撳叆8V鍜15V,鐩存祦杈撳嚭+5V銆+12V鍜-12V鐨勭嚎鎬х洿娴佺ǔ鍘嬬數婧愩 鍔熻兘鎸囨爣:杈撳嚭绾规尝鐢靛帇灏忎簬5mV,绋冲帇绯绘暟灏忎簬 ,杈撳嚭鍐呴樆灏忎簬0.1娆с傝璁¤姹:鎵璁捐鐨勭洿娴佺ǔ鍘嬬數...
绛旓細鐢ㄦ暣娴佸櫒銆傛暣娴佸櫒鏄竴涓暣娴佽缃紝绠鍗曠殑璇村氨鏄皢浜ゆ祦锛圓C锛夎浆鍖栦负鐩存祦锛圖C锛夌殑瑁呯疆銆傚畠鏈変袱涓富瑕佸姛鑳斤細绗竴锛屽皢浜ゆ祦鐢碉紙AC锛夊彉鎴愮洿娴佺數(DC)锛岀粡婊ゆ尝鍚庝緵缁欒礋杞斤紝鎴栬呬緵缁欓嗗彉鍣紱绗簩锛岀粰钃勭數姹犳彁渚涘厖鐢电數鍘嬨傚洜姝わ紝瀹冨悓鏃跺張璧峰埌涓涓厖鐢靛櫒鐨勪綔鐢ㄣ傚綋瀹氬瓙绾垮湀鎰熷簲鍑轰氦娴佺數鐨勬椂鍊欙紝鍚戞暣娴佷簩鏋佺璧帮紝...
绛旓細鍙樺帇鍣ㄧ殑鍘熺悊鏄閫氶噺鐨勫彉鍖栦骇鐢熺殑鐢电杞崲锛屾兂瑕佷娇纾侀氶噺鍙樺寲灏卞緱浣跨敤浜ゅ彉鐢垫祦锛屾墍浠ョ洿娴佺數鏄笉鑳借鐩存帴鍗囧帇闄嶅帇鐨勶紝鍙湁浜ゆ祦鐢垫墠鍙互鍗囧帇闄嶅帇
绛旓細鎴戜釜浜鸿涓990921璇寸殑涓嶅锛屽洜涓哄鏋滀綘鍙湁涓涓1.5V鐨勭數姹狅紝閭ｄ箞鍙湁鍏堟妸杩欎釜鐢靛帇杞鎴愪氦娴佺數鍘嬬劧鍚庡啀缁忓崌鍘嬫墠鑳藉仛鍒拌緭鍑5V,鍥犱负鍙樺帇鍣ㄥ彧鑳芥劅搴斾氦娴佷俊鍙锋墠鑳藉彉鍘嬶紝鐢ㄥ垎绔嬪厓浠跺彲浠ュ氨鍙互鎼缓銆侽K,濡傛灉浣犲彲浠ョ敤鍑犱釜1.5V鐨勭數姹犻偅灏卞ソ鍔炰簡锛屽彲浠ョ敤5涓1.5V骞茬數姹犱覆鑱斿啀缁7805涓夋绋冲帇杈撳嚭涓5V銆傛垜涔嬫墍浠ヨ99092...
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