{"id":322,"date":"2026-02-04T04:14:53","date_gmt":"2026-02-03T20:14:53","guid":{"rendered":"https:\/\/gccircuit.com\/wordpress\/?p=322"},"modified":"2026-03-06T14:04:07","modified_gmt":"2026-03-06T06:04:07","slug":"lm1875-dc-servo-amp-%e6%93%b4%e5%a4%a7%e6%a9%9f","status":"publish","type":"post","link":"https:\/\/gccircuit.com\/wordpress\/2026\/02\/04\/lm1875-dc-servo-amp-%e6%93%b4%e5%a4%a7%e6%a9%9f\/","title":{"rendered":"LM1875 DC SERVO AMP. (\u64f4\u5927\u6a5f)"},"content":{"rendered":"\n

\u539f\u6587\u51fa\u7248\u65e5\u671f:2016\/5\/26 George Liao.<\/p>\n\n\n\n

DIY\u4f60\u7684\u500b\u4ebaHI-FI\u64f4\u5927\u6a5f\uff1aLM1875 DC SERVO Amplifier.<\/strong><\/p>\n\n\n\n

\u5e7e<\/strong>\u5e74\u4e0b\u4f86\uff0c\u7ad9\u4e0a\u652f\u6301\u5ea6\u6700\u9ad8\u7684\u64f4\u5927\u6a5f\u662fLM3886 DC SERVO AMP. \u56e0\u70ba\u5b83\u7684\u97f3\u8cea\u751c\u7f8e\uff0cC\/P\u503c\u7b97\u662f\u8d85\u9ad8\u7684\u4e86\uff0c\u53ea\u8981\u5587\u53ed\u4e0d\u8981\u592a\u5dee\uff0c\u5b83\u7d66\u4f60\u7684\u56de\u994b\u5be6\u5728\u662f\u592a\u503c\u5f97\u7684\uff1b\u4f46\u7531\u65bc\u4e0d\u662f\u6bcf\u500b\u4eba\u90fd\u9700\u8981\u90a3\u9ebc\u5927\u74e6\u6578\u7684\u5f8c\u7d1a\u64f4\u5927\u6a5f\uff0c\u6240\u4ee5\u9019\u6b21\u518d\u898f\u5283\u8f03\u4f4e\u74e6\u6578\u7684LM1875\u64f4\u5927\u6a5f\uff0c\u9019\u9846\u529f\u7387IC\u97f3\u8cea\u4e5f\u662f\u6df1\u7372\u597d\u8a55\u7684\u529f\u653eIC\uff0c\u5176\u5be6\u4e4b\u524d\u672c\u7ad9\u4e5f\u6709\u505a\u597d\u542b\u6709\u97f3\u8cea\u63a7\u5236\u7684LM1875\u64f4\u5927\u6a5f\u96fb\u8def\uff0c\u4f46\u5728\u90a3\u500b\u5206\u4eab\u4e0a\u6211\u4e26\u6c92\u6709\u52a0\u4e0aDC  SERVO,\u53ea\u80fd\u4ee5\u5916\u52a0\u7684\u65b9\u5f0f\u4f86\u628aDC SERVO\u52a0\u4e0a\uff0c\u6240\u4ee5\u9019\u6b21\u6211\u5011\u4ee5\u985e\u4f3cLM3886\u7684\u65b9\u5f0f\u628aDC SERVO\u52a0\u5230LM1875\u4e0a!<\/p>\n\n\n\n

DC SERVO\u96fb\u8def\u6709\u4ec0\u9ebc\u597d\u8655? \u9664\u4e86\u53ef\u4ee5\u628a\u8f38\u51fa\u7684\u76f4\u6d41\u81ea\u52d5\u8abf\u6574\u81f3\u8fd1\u4e4e\u662f0V\u5916\uff0c\u5be6\u969b\u9ad4\u9a57\u904e\u7684\u4eba\u90fd\u80fd\u611f\u53d7\u807d\u611f\u4e0a\u6574\u9ad4\u7684\u7d30\u7bc0\u8c50\u5bcc\u591a\u4e86\uff0c\u4f4e\u983b\u53ef\u4ee5\u76f4\u6f5b\u800c\u4e0b\uff0c\u4e2d\u983b\u539a\u5ea6\u53ef\u80fd\u56e0\u70ba\u7a7a\u6c23\u611f\u53ca\u97f3\u5834\u7684\u5f71\u97ff\uff0c\u8b8a\u5f97\u66f4\u70ba\u539a\u5be6\uff0c\u4eba\u8072\u66f4\u52a0\u6709\u97fb\u5473\u3002\u9ad8\u983b\u6e05\u6670\u4e9b\uff0c\u4f46\u7d55\u4e0d\u662f\u589e\u5f37\u7684\u6e05\u6670\uff0c\u6211\u5011\u5728\u96fb\u8def\u4e2d\u6c92\u6709\u52a0\u5165RC\u7684\u97f3\u63a7\u96fb\u8def\uff0c\u800c\u662f\u5b83\u7684\u7d30\u7bc0\u8b8a\u591a\u6240\u9020\u6210\u7684\u807d\u611f\u3002<\/p>\n\n\n\n

\u96fb\u8def\u4e00\u6a23\u662f\u672c\u8457\u6211\u5011\u7ad9\u4e0a\u7684\u4e00\u8cab\u505a\u6cd5\uff0c\u9ad8C\/P\u503c! \u8b93\u5927\u5bb6\u80fd\u5920\u6709\u6700\u9ad8\u7684\u5b8c\u6574\u5ea6\u53caDIY\u6210\u529f\u7387\uff0c\u96fb\u8def\u975e\u5e38\u7cbe\u7c21\uff0c\u6211\u60f3\u5c31\u7b97\u662f\u5165\u9580\u8005\u4e5f\u80fd\u8f15\u9b06\u7684\u5b8c\u6210!<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u96fb\u8def\u5716:<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u524d\u5f8c\u7d1a\u7684\u90e8\u4efd\u6211\u53ea\u756b\u51fa\u4e00\u500b\u8072\u9053\uff0c\u53e6\u4e00\u500b\u8072\u9053\u662f\u5c0d\u7a31\u76f8\u540c\u7684\uff0cU1A\u70ba\u8f38\u5165\u7684\u7de9\u885d\u53ca\u524d\u7d1a\uff0c\u96fb\u6e90\u5206\u5f8c\u7d1a\u53ca\u524d\u7d1a\uff0c\u5f8c\u7d1a\u6211\u5011\u76f4\u63a5\u7531\u8b8a\u58d3\u5668\u6574\u6d41\u3001\u96fb\u5bb9\u7a69\u58d3\u5f8c\u4f9b\u61c9LM1875\u7684\u96fb\u529b\uff0c\u524d\u7d1a\u7684\u96fb\u6e90\u70ba+-15V\uff0c\u6211\u7528\u7c21\u55ae\u7a69\u58d3IC\uff0c7815\u53ca7915\u4f86\u9054\u6210\u3002<\/p>\n\n\n\n

\u96fb\u8def\u677f\u96f6\u4ef6\u914d\u7f6e:<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u96f6\u4ef6\u6e05\u55ae\u5982\u4e0b:<\/strong><\/p>\n\n\n\n

LM1875 DC SERVO AMP. \u96f6\u4ef6\u6e05\u55ae<\/td><\/tr>
1K<\/td>10<\/td>R1*2,R4*2,R5*2,R6*2,R8*2<\/td>10uF\/25V<\/td>2<\/td>C16*2<\/td><\/tr>
100K<\/td>4<\/td>R2*2,R3*2<\/td>100uF\/25V<\/td>2<\/td>C14,C15<\/td><\/tr>
33K<\/td>2<\/td>R9*2<\/td>4700Uf\/35V(\u65e5\u7cfb)<\/td>2<\/td>C12,C13<\/td><\/tr>
10R<\/td>2<\/td>R16,R17<\/td> <\/td> <\/td> <\/td><\/tr>
10K<\/td>6<\/td>R7*2,R10*2,R18*2<\/td>NE5532<\/td>2<\/td>U1,U2<\/td><\/tr>
330R<\/td>2<\/td>R19,R20<\/td>LM1875(\u6b63)<\/td>2<\/td>U3*2<\/td><\/tr>
4.7K<\/td>1<\/td>R21<\/td>7815<\/td>1<\/td>U4<\/td><\/tr>
1M<\/td>4<\/td>R14*2,R15*2<\/td>7915<\/td>1<\/td>U5<\/td><\/tr>
220R\/0.5W(\u78b3\u819c)<\/td>2<\/td>R12*2<\/td>\u649f\u5f0f\u6574\u6d41(\u7acb\u5f0f)<\/td>1<\/td>BD1<\/td><\/tr>
10R\/0.5W(\u78b3\u819c)<\/td>2<\/td>R11*2<\/td> <\/td> <\/td> <\/td><\/tr>
0.33R\/2W(\u78b3\u819c)<\/td>2<\/td>R13*2<\/td>3PIN\u96fb\u6e90\u7aef\u5b50<\/td>1<\/td>AC IN<\/td><\/tr>
 <\/td> <\/td> <\/td>3PIN\u5c0f\u767d\u5ea7<\/td>1(3)<\/td>CON2,(COM3*2)<\/td><\/tr>
1uF\u91d1\u5c6c<\/td>2<\/td>C1*2<\/td>2PIN\u5c0f\u63d2\u5ea7 \u6216LED<\/td>1<\/td>CON5\u5916\u63a5LED<\/td><\/tr>
220p<\/td>2<\/td>C2*2<\/td>8PIN IC\u5ea7<\/td>2<\/td>U1,U2<\/td><\/tr>
105\u7a4d\u5c64<\/td>2<\/td>C4*2<\/td>SP\u63d2\u5ea7(\u56db\u65b9)<\/td>1\u81ea\u5099<\/td>SP OUT<\/td><\/tr>
104(\u7a4d\u5c64)<\/td>2<\/td>C10,C11<\/td>\u9285\u67f1,\u87ba\u6bcd\u7d44<\/td>4\u81ea\u5099<\/td> <\/td><\/tr>
104(\u91d1\u5c6c )<\/td>8<\/td>C3*2,C5*2,C8,C6,C7,C9<\/td>(\u6563\u71b1\u7247)<\/td>1\u81ea\u5099<\/td>FOR LM1875<\/td><\/tr>
 <\/td> <\/td> <\/td>TO-220\u7d55\u7da0\u7d44<\/td>2<\/td>FOR LM1875<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

*\u96fb\u963b\u7121\u7279\u5225\u6a19\u8a3b\u8005\u70ba1\/4W\u7cbe\u5bc61%\u91d1\u5c6c\u76ae\u819c\u96fb\u963b,\u6709\u81ea\u5099\u6a19\u6ce8\u8005\u8868\u793a\u4e0d\u542b\u5728\u96f6\u4ef6\u5305\u5167.<\/p>\n\n\n\n

\u6ce8\u610f\u4e8b\u9805\uff1a<\/strong><\/p>\n\n\n\n

    \n
  1. \u96f6\u4ef6\u710a\u63a5\u6709\u6642\u5c0d\u65b0\u624b\u6709\u56f0\u96e3\uff0c\u63d0\u9192\u4e00\u4e0b\uff0c\u96d6\u8aaa\u96f6\u4ef6\u6015\u9577\u6642\u9593\u904e\u71b1\uff0c\u4f46\u65b0\u624b\u5e38\u56e0\u710a\u63a5\u6642\u9593\u5927\u77ed\uff0c\u4f7f\u5f97\u710a\u9ede\u9664\u4e86\u4e0d\u597d\u770b\u5916\u9084\u5bb9\u6613\u5047\u710a\uff0c\u6240\u4ee5\u5225\u592a\u64d4\u5fc3\uff0c\u96f6\u4ef6\u6c92\u90a3\u9ebc\u4f2f\u71b1\uff0c\u6642\u9593\u4e45\u4e00\u9ede\uff0c\u8b93\u7194\u932b\u80fd\u5b8c\u6574\u7684\u64f4\u6563\u5230\u9285\u7b94\u53ca\u710a\u8173\u4e0a\uff0c\u710a\u9ede\u7684\u5f62\u72c0\u6700\u597d\u5448\u201d\u5c71\u201d\u578b\uff0c\u4e0d\u8981\u70ba\u201d\u73e0\u201d\u578b\uff0c\u9019\u6a23\u4e0d\u597d\u5224\u65b7\u6709\u6c92\u5047\u710a!<\/li>\n\n\n\n
  2. \u96fb\u6e90\u7aef\u5b50\u53ef\u4ee5\u9069\u75282\u7a2e\u8173\u8ddd\u7684\u63a5\u7dda\u7aef\u5b50\uff0c\u6ce8\u610f\u7684\u662f\u4f7f\u752818-0-18 ACV\u7684\u8b8a\u58d3\u5668\uff0c\u63a5\u5230\u7aef\u5b50\u7684\u9806\u5e8f\u662f\u4e0d\u540c\u7684\uff0c0V\u8981\u5728\u6700\u53f3\u65b9\uff0c\u70ba18-18-0\uff0c\u8acb\u5c0f\u5fc3<\/li>\n\n\n\n
  3. \u5b8c\u6210\u5f8c\u4e0a\u96fb\u5f8c\uff0c\u5148\u4e0d\u63a5\u5587\u53ed\uff0c\u53ef\u4ee5\u505a\u500b\u7c21\u55ae\u7684\u6e2c\u8a66\uff0c\u770b\u770b\u8f38\u51fa\u6709\u6c92\u76f4\u6d41\u8f38\u51fa\uff0c\u4f60\u53ef\u4ee5\u7528\u842c\u7528\u8868\u7684DC\u96fb\u58d3\u6a94\u4f86\u91cf\u5587\u53ed\u8f38\u7684\u63a5\u9ede\uff0c\u61c9\u6703\u57280.03V\u4ee5\u4e0b\uff0c\u9019\u6a23\u5c31\u6c92\u554f\u984c\u53ef\u4ee5\u63a5\u4e0a\u5587\u53ed\u4e86!<\/li>\n\n\n\n
  4. \u5587\u53ed\u51fa\u7dda\u53ef\u4ee5\u76f4\u63a5\u710a\u5728\u96fb\u8def\u677f\u4e0a(\u5982\u4e0b\u5de6\u5716),\u4e5f\u53ef\u4f7f\u7528\u9019\u6a23\u7684\u63d2\u5ea7(\u96f6\u4ef6\u5305\u5167\u4e0d\u542b,\u5982\u4e0b\u53f3\u5716)\u3002<\/li>\n<\/ol>\n\n\n\n
    \n
    \n
    \"\"<\/figure>\n<\/div>\n\n\n\n
    \n
    \"\"<\/figure>\n<\/div>\n<\/div>\n\n\n\n
      \n
    1. \u97f3\u91cfVR\u53ef\u4ee5\u76f4\u63a5\u710a\u5728\u96fb\u8def\u677f(\u5982\u4e0b\u5de6\u5716)\uff0c\u6216\u4f7f\u7528\u96fb\u8def\u677f\u4e0a\u9810\u7559\u7684\u5b54\u4f4d\u710a\u4e0a\u5c0f\u578b3PIN\u63d2\u5ea7(\u96f6\u4ef6\u5305\u5167\u4e0d\u542b,\u5982\u4e0b\u53f3\u5716)\u53ef\u4ee5\u4ee5\u5c0e\u7dda\u9023\u63a5\u81f3VR,\u65b9\u4fbf\u6709\u6a5f\u7bb1\u6642\u5ef6\u4f38\u4f7f\u7528\u3002<\/li>\n<\/ol>\n\n\n\n
      \n
      \n
      \"\"<\/figure>\n<\/div>\n\n\n\n
      \n
      \"\"<\/figure>\n<\/div>\n<\/div>\n\n\n\n
        \n
      1. \u958b\u6a5f\u6642\u6703\u6709\u77ed\u77ed\u7684\u201d\u5575\u201d\u8072\uff0c\u5225\u64d4\u5fc3!<\/li>\n\n\n\n
      2. \u5982\u679c\u4f60\u6709\u81ea\u5df1\u898f\u5283\u6a5f\u6bbc\uff0c\u91d1\u5c6c\u6a5f\u6bbc\u901a\u5e38\u9700\u8981\u628a\u96fb\u8def\u4e0a\u7684\u5730(GND)\u9ede\u8ddf\u6a5f\u6bbc\u63a5\u89f8\uff0c\u4ee5\u9019\u96fb\u8def\u677f\u4f86\u8aaa,\u6211\u5df2\u6709\u5728\u5176\u4e2d\u4e00\u500b\u9285\u67f1\u7684\u9396\u5b54\u4e0a\u505a\u63a5\u5730\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u4ee5\u9285\u67f1\u628a\u96fb\u8def\u677f\u56fa\u5b9a\u5728\u6a5f\u6bbc\u4e0a\uff0c\u90a3\u5c31\u4e0d\u9700\u8981\u518d\u505a\u4e00\u6b21\u6a5f\u6bbc\u63a5\u5730\u4e86!<\/li>\n<\/ol>\n\n\n\n

        \u96fb\u8def\u677f\u5e95\u7247\u6a94: LM1875-DCSERVO-FILM.pdf<\/a><\/strong><\/p>\n\n\n\n

        \u53ef\u4ee5\u5217\u5370\u5728\u63cf\u5716\u7d19\u4f86\u88fd\u4f5c\u611f\u5149\u96fb\u8def\u677f\uff0c\u6ce8\u610f\u5217\u5370\u6642\u8981\u53d6\u6d88\u81ea\u52d5\u7e2e\u653e(\u9801\u9762\u7e2e\u653e\u9078[\u7121<\/strong>])\uff0c\u4e0d\u7136\u6d17\u51fa\u4f86\u7684\u677f\u5b50\u5c31\u4e0d\u4e00\u6a23\u5927\u4e86\uff0c\u5370\u51fa\u6642\u662f\u96d9\u9762\u677f\u5716\uff0c\u6240\u4ee5\u5370\u5728\u900f\u660e\u7247\u5f8c\u8981\u66dd\u5149\u6642\u8981\u6ce8\u610f\u662f\u90a3\u4e00\u9762\uff0c\u4e0a\u4e0b\u78ba\u5be6\u5c0d\u6b63\u5f8c\u518d\u66dd\u5149\uff0c\u4e14\u5169\u9762\u7684\u66dd\u5149\u6642\u9593\u8981\u4e00\u6a23\u3002<\/p>\n\n\n\n

        \"\"<\/figure>\n\n\n\n

        \u4ee5\u4e0b\u5e7e\u5f35\u5b8c\u6210\u710a\u63a5\u5f8c\u7684\u7167\u7247\u7d66\u5927\u5bb6\u53c3\u8003:<\/p>\n\n\n\n

        \"\"<\/figure>\n\n\n\n
        \"\"<\/figure>\n\n\n\n
        \"\"<\/figure>\n\n\n\n

        \u96f6\u4ef6\u4f9b\u61c9:<\/p>\n\n\n\n

        \u5982\u679c\u4f60\u6709\u9700\u8981\u6b64\u96fb\u8def\u677f\u6216\u96f6\u4ef6\uff0c\u8acb\u5148\u4f86\u4fe1\u554f\u770b\u770b\u9084\u6709\u6c92\u5269 EMAIL<\/a>\uff0c\u53ef\u4ee5\u63d0\u4f9b\u7684\u4e3b\u8981\u96f6\u4ef6\u6709\u5982\u4e0b\uff0cEMAIL(georgeliao886@gmail.com)\u7d66\u6211EMAIL<\/a>\u3002 <\/p>\n\n\n\n

        \"\"<\/figure>\n\n\n\n

        LM1875 DC-SERVO AMP.\u96d9\u9762\u96fb\u8def\u677f………..$220<\/p>\n\n\n\n

        \u6563\u71b1\u7247(\u5df2\u5b8c\u6210M3\u653b\u5b54)…………………$130<\/p>\n\n\n\n

        \u5168\u5957\u96f6\u4ef6\u5305\u5982\u4e0a\u5716\uff0c(\u53c3\u8003\u96f6\u4ef6\u8868) ,\u4e0d\u542b\u8b8a\u58d3\u5668 ………………..$520<\/p>\n\n\n\n

        PT-34B \u8b8a\u58d3\u5668 ………………………$470 (\u8b8a\u58d3\u5668\u6f32\u50f9,\u50f9\u683c\u6703\u6709\u8b8a\u52d5)<\/p>\n\n\n\n

        *\u4ee5\u4e0a\u5168\u5957\u542b\u96fb\u8def\u677f\u3001\u96f6\u4ef6\u5305\u3001\u6563\u71b1\u7247\u53caPT-34B\u8b8a\u58d3\u5668\u5408\u8a08\u70ba $1,170 (\u8b8a\u58d3\u5668\u6f32\u50f9,\u50f9\u683c\u6703\u6709\u8b8a\u52d5)<\/p>\n\n\n\n

        \u904b\u8cbb\u53e6\u8a08,\u7d04$65<\/p>\n\n\n\n

        \u7248\u6b0a\u6240\u6709\uff0c\u8acb\u52ff\u8f49\u8f09<\/p>\n\n\n\n

        \u55ac\u6cbb\u67e5\u723e\u65af\u96fb\u5b50\u96fb\u8def\u7db2<\/p>\n\n\n\n

        <\/p>\n","protected":false},"excerpt":{"rendered":"

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