帮忙分析一下这个测光电路
\u5e2e\u5fd9\u5206\u6790\u4e00\u4e0b\u8fd9\u4e2a\u7535\u8def\u3002\u3002\u3002\u3002\u3002\u8c22\u4e86\u73b0\u5728\u4eba\u90fd\u61d2\u4e86\uff0c\u6211\u89c9\u5f97\u5f04\u4e2a\u4fbf\u5b9c\u7684\u5355\u7247\u673a\uff0c\u505a\u4e2a\u8fd9\u4e1c\u897f\uff0c\u6bd4\u7528\u6570\u5b57\u903b\u8f91\u6765\u7684\u66f4\u65b9\u4fbf\uff0c\u66fe\u7ecf\u7528\u8fc7\u7684\u6700\u4fbf\u5b9c\u7684\u5355\u7247\u673a\uff0c8\u811a\uff0c\u4ef7\u683c\u624d1\u5143\u94b1\u3002
\u5206\u6790\u4e00\u4e0b\u8fd8\u633a\u597d\u73a9\u513f\uff0c\u6ca1\u6709\u4e00\u4e2a\u5143\u4ef6\u5403\u767d\u996d\u7684
VD4\u3001R2\u3001C3\u3001VD6\u662f\u7535\u6e90\u7535\u8def\uff0c\u534a\u6ce2\u6574\u6d41\uff0c\u7a33\u538b\u7ba1\u7a33\u538b\uff0c\u7535\u538b\u7ea66V\uff0c\u7ed9CD4069\u4f9b\u7535\uff0c\u6709\u70b9\u9ad8\u54c8\uff0c\u4f9b5V\u6bd4\u8f83\u597d\u3002
\u975e\u95e8V\u548cVI\u5e76\u8054\u4ee5\u63d0\u9ad8\u9a71\u52a8\u80fd\u529b\u3002
R5\u3001R6\u5206\u538b\u6bd40.01\u5de6\u53f3\uff0c220V\u7ecfVD5\u53d8\u6210\u534a\u6ce2\u76f4\u6d41\uff0c\u82e5VD3\u652f\u8def\u65ad\u5f00\uff0cVT\u57fa\u6781\u5cf0\u503c\u7ea63.3V\u3002
=====
\u4e0a\u7535\uff1a\u5047\u8bbeC1\u4e24\u7aef\u7535\u538b\u4e3a0\uff0cR2\u4e0a\u7aef\u7535\u538b\u4e3a0\uff0c\u6b64\u65f6II\u8f93\u51fa1\uff0cI\u8f93\u51651\u3001\u8f93\u51fa0\uff1bII\u8f93\u51fa\u76841\u7ecfVD2\u5230V\u3001VI\u8f93\u5165\uff0c\u5bfc\u81f4V\u3001VI\u8f93\u51fa0\uff1b\u7ecfVD3\u5c06VD3\u53f3\u4fa7\u4e0b\u62c9\u52300V\uff0cVT\u4e0d\u5bfc\u901a\uff0cVS\u4e0d\u5bfc\u901a\uff0c\u706f\u4e0d\u4eae\u3002
\u6b64\u65f6\uff0cIII\u3001IV\u8fd9\u6761\u8def\u5f84\u4e5f\u4e00\u6837\uff0cIII\u5de6\u8fb9\u8f93\u51651\uff0c\u53f3\u8fb9\u8f93\u51fa0\uff0cC2\u7535\u5bb9\u4e0a\u7535\u65f6\u4e24\u7aef\u7535\u538b\u4e3a0\uff0cIV\u5de6\u8fb9\u8f93\u51650\uff0c\u53f3\u8fb9\u8f93\u51fa1\uff0c\u4e0eII\u63d0\u4f9b\u7684\u8f93\u51fa\u543b\u5408\u3002
=====
\u6309\u52a8SB\u518d\u653e\u5f00\uff0c\u56e0\u6b64\u65f6C1\u4e24\u7aef\u7535\u538b\u4e3a0\uff0c\u4f7f\u539f\u6765I\u5de6\u8fb9\u76841\u88ab\u77ed\u8def\u52300\uff0cI\u3001II\u7ffb\u8f6c\u5e76\u4fdd\u6301\u4f4f\uff0c\u6b64\u65f6II\u53f3\u8fb9\u8f93\u51fa0\uff0cI\u53f3\u8fb9\u8f93\u51fa1\uff0c\u7ecfR2\u5bf9C1\u7f13\u6162\u5145\u7535\uff0cC1\u4e24\u7aef\u7535\u538b\u5f00\u59cb\u4e0a\u5347\u3002II\u53f3\u8fb9\u8f93\u51fa\u76840\u4f7fVD2\u5de6\u8fb9\u4e3a0\uff0cVD2\u8fd9\u6761\u652f\u8def\u8865\u5728\u9a71\u52a8V\u3001VI\u3002\u770bIII\u3001IV\u8fd9\u6761\u652f\u8def\uff1aIII\u5de6\u8fb9\u8f93\u51650\uff0c\u53f3\u8fb9\u8f93\u51fa1\uff0cC2\u521a\u624d\u4e24\u7aef\u7535\u538b\u4e3a0\uff0c\u7535\u5bb9\u4e24\u7aef\u7535\u538b\u4e0d\u80fd\u7a81\u53d8\uff0c\u5de6\u8fb9\u8df3\u53d8\u62101\u4f7f\u5f97\u5176\u53f3\u4fa7\u7535\u538b\u4e5f\u968f\u4e4b\u4e3a1\uff0cIV\u5de6\u8fb9\u8f93\u51651\uff0c\u53f3\u8fb9\u8f93\u51fa0\u3002\u53ef\u89c1\u6b64\u65f6V\u3001VI\u5de6\u8fb9\u4e24\u6761\u652f\u8def\u7535\u538b\u90fd\u4e3a0\uff0c\u56e0\u6b64V\u3001VI\u8f93\u51fa1\uff0cVD3\u5de6\u8fb9\uff08\u9634\u6781\uff09\u4e3a1\uff0c\u4e0d\u5bfc\u901a\uff0c\u91ca\u653e\u4e86\u5bf9R5\u3001R6\u5206\u538b\u8282\u70b9\u7684\u63a7\u5236\uff0c\u8be5\u8282\u70b9\u76843.3V\u534a\u6ce2\u7535\u538b\u9a71\u52a8VT\u5bfc\u901a\uff0c\u4ece\u800cVT\u9a71\u52a8VS\u5bfc\u901a\uff0c\u706f\u4eae\u3002
======
\u65f6\u95f4\u6d41\u6dcc\uff1a
\u521a\u624d\u8bf4\u8fc7\uff0c\u7535\u5bb9\u4e24\u7aef\u7535\u538b\u4e0d\u80fd\u7a81\u53d8\uff0c\u4f46\u662f\u53ef\u4ee5\u7ecfR\u5145\u653e\u7535\u800c\u7f13\u6162\u53d8\u5316\u3002\u56de\u5934\u770b\u4e0bC1\u3001C2\u3002C1\u7535\u538b\u56e0R2\u5145\u7535\u800c\u4e0a\u5347\uff0c\u65f6\u95f4\u5e38\u6570t=R1\u00d7C1=1e6 \u6b27\u00d70.1e-6 uF=0.1\u79d2\uff0c\u5c31\u662f\u8bf4\u5dee\u4e0d\u591a\u51e0\u5341\u6beb\u79d2\uff0cC1\u4e24\u7aef\u7535\u538b\u5c31\u5145\u5230\u903b\u8f911\u4e86\u3002C2\u5de6\u8fb9\u521a\u624d\u53d8\u4e3a1\uff0c\u53f3\u8fb9\u4e5f\u4e3a1\uff0cR3\u5bf9\u5176\u5145\u7535\uff0c\u4f7f\u5f97\u5176\u53f3\u4fa7\u7535\u538b\u4e0b\u964d\uff0c\u7ecf\u8fc7t2=R3\u00d7C2=1e6\u00d71000e-6=1000\u79d2\uff0c\u5dee\u4e0d\u591aC2\u53f3\u7aef\u7535\u538b\u4e0b\u964d\u4e3a0\uff08\u5176\u5b9e\u53ea\u8981\u4e0b\u964d\u52300.3VCC\u4ee5\u4e0b\uff0c\u5373\u7ea60.3\u00d76=1.8V\u4ee5\u4e0b\uff0c\u5c31\u5230\u4e86CMOS\u903b\u8f91\u95e8\u7684\u4f4e\u7535\u5e73\u9608\u503c\uff0cIV\u5de6\u8fb9\u539f\u6765\u4e3a1\uff0c\u73b0\u5728\u4e3a0\uff0cIV\u8f93\u51fa\u8df3\u53d8\u4e3a1\uff0c\u7ecfR4\uff0c\u9a71\u52a8V\u3001VI\u5de6\u4fa7\u4e3a1\uff0c\u53f3\u4fa7\u8f93\u51fa0\uff0c\u53c8\u628a\u706f\u5173\u6389\u4e86\u3002
======
\u706f\u7184\u706d\u540e\u7b2c\u4e00\u6b21\u6309SB\uff1a
\u6309\u4e4b\u524dI\u5de6\u8fb9\u4e3a0\uff0c\u800cC1\u4e0a\u7535\u538b\u5df2\u7ecf\u4e3a1\uff0c\u518d\u6309SB\uff0c\u5f88\u5feb\u5c06I\u5de6\u8fb9\u77ed\u8def\u62101\uff08II\u7684\u8f93\u51fa\u9a71\u52a8\u80fd\u529b\u4e0d\u53caC1\u7684\u77ed\u8def\u4f5c\u7528\uff0cC1\u7535\u538b\u4e0d\u7a81\u53d8\uff0c\u53ea\u8981\u4e00\u77ac\u95f4I\u5de6\u8fb9\u4e3a1\uff0cI\u3001II\u5c31\u518d\u6b21\u7ffb\u8f6c\u5e76\u9501\u4f4f\uff09\u3002\u8fd9\u6837\u5bfc\u81f4I\u5de6\u8fb9\u4e3a1\u3001\u53f3\u8fb9\u4e3a0\uff0c\u7ecfR2\u5bf9C1\u653e\u7535\uff0c\u5927\u6982\u51e0\u5341\u6beb\u79d2C1\u5c31\u4f1a\u6062\u590d\u5230\u4e0a\u7535\u90a3\u662f\u76840\u7535\u538b\u3002\u8fd9\u4e2a\u72b6\u6001\u662fI\u3001II\u4e0a\u7535\u65f6\u7684\u72b6\u6001\u3002
\u518d\u770bC2\uff0c\u521a\u624dC2\u5de6\u8fb9\u4e3a1\uff0c\u53f3\u8fb9\u4e3a0\uff0c\u56e0\u4e3aII\u8f93\u51fa\u7ffb\u8f6c\u4e3a1\uff0c\u6240\u4ee5III\u8f93\u51fa\u7ffb\u8f6c\u4e3a0\uff0c\u76f8\u5f53\u4e8e\u5c06C2\u5de6\u8fb9\u63a5\u5730\uff08\u4e5f\u5c31\u662fVD1\u7684\u9633\u6781\uff09\uff0c\u800cC2\u53e6\u4e00\u7aef\u53ef\u662f\u63a5\u4e86VD1\u7684\u9634\u6781\uff0c\u6b64\u65f6VD1\u6d3e\u4e0a\u7528\u573a\u4e86\uff0c\u8fc5\u901f\u7684\u5c061000uF\u7684C2\u653e\u7535\u52300\uff0c\u6b64\u65f6C2\u6062\u590d\u5230\u4e0a\u7535\u7684\u72b6\u6001\u3002
\u8fd9\u6837\uff0c\u6574\u4e2a\u7535\u8def\u5728\u81ea\u52a8\u7184\u706f\u540e\u7b2c\u4e00\u6b21\u6309SB\uff0c\u5b8c\u5168\u6062\u590d\u4e0a\u7535\u65f6\u7684\u521d\u59cb\u72b6\u6001\u3002
====
\u7184\u706f\u540e\u7b2c2\u6b21\u6309SB\u5c31\u548c\u4e0a\u7535\u65f6\u6309SB\u5de5\u4f5c\u6d41\u7a0b\u4e00\u6837\u4e86\u3002
=====
\u706f\u4eae\u65f6\u6309SB\uff0c\u548c\u521a\u624d\u8bf4\u7684\u81ea\u52a8\u7184\u706f\u540e\u7b2c\u4e00\u6b21\u6309SB\u7684\u5de5\u4f5c\u6d41\u7a0b\u4e00\u6837\uff0c\u4e5f\u662f\u8ba9\u7535\u8def\u8fc5\u901f\u6062\u590d\u4e0a\u7535\u521d\u59cb\u72b6\u6001\u3002
=====
\u5bf9\u7740\u6211\u4e0a\u9762\u8bf4\u7684\u8fc7\u7a0b\u4e00\u6b65\u6b65\u770b\u770b\uff0c\u5c31\u80fd\u660e\u767d\uff0c\u6709\u95ee\u9898\u518d\u63a5\u7740\u95ee\u3002\u5e0c\u671b\u5199\u7684\u6ca1\u7b14\u8bef\u3002\u8fd8\u662f\u7528\u5355\u7247\u673a\u505a\u6bd4\u8f83\u7701\u94b1\u4e14\u529f\u80fd\u7075\u6d3b\uff0c\u6309\u4e00\u6b21\u5f00\u3001\u5ef6\u65f6\u7184\u706d\uff0c\u518d\u6309\u4e00\u6b21\u53c8\u5f00\u4e86\u3002\u7b80\u5355\u51e0\u5341\u884c\u7a0b\u5e8f\u3002
\u8fd9\u4e2a\u5206\u6790\u5176\u5b9e\u662f\u542f\u52a8\u7535\u8def\u4f60\u53ef\u4ee5\u770b\u4e0bMIP2C2\u7684\u5185\u90e8\u7ed3\u6784\u56fe\uff0c\u4e0a\u7535\u540eD\u811a\u7ed9\u82af\u7247\u5de5\u4f5c\uff0c\u82af\u7247\u5de5\u4f5c\u4ee5\u540e\u901a\u8fc7\u53d8\u538b\u5668\u6b21\u7ea7\u7ed9VCC\u4f9b\u7535 D\u7ea7\u4f9b\u7535\u65ad\u5f00 \u82af\u7247\u6b63\u5e38\u5de5\u4f5c
哈哈，最为关键的地方就是I-V转换电路，你都已经说了，其他的都与MCU有关，没什么可说的了。比如，按下POW，会让Q3、Q2导通，同时通过Q5给单片机一个信号，估计单片机随即会输出一个信号让Q4导通，从而保持Q2导通，实现对POW键的自锁；不过，这个图大概是个示意框图吧，因为运放是工作在単电源状态下，按图如果没有提供偏置，是不能正常工作的；
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