555定时器延时电路 555延时电路的时间计算
\u5982\u4f55\u7528555\u5b9a\u65f6\u5668\u8bbe\u8ba1\u4e00\u4e2a\u5ef6\u65f6\u4e00\u79d2\u7684\u7535\u8def\u4e0e\u4e00\u822c\u7684555\u5355\u7a33\u7535\u8def\u4e0d\u540c\u7684\u662f\u5728\u7b2c5\u811a\u63a5\u6709\u4e00\u53ea\u4e8c\u6781\u7ba1VD1\uff0c\u5c06\u8be5\u811a\u4e0e\u7535\u6e90\u7535\u538b+6V\u63a5\u901a\u3002\u8be5\u811a\u662f555\u7684\u63a7\u5236\u7aef\uff0c\u4e0e\u5185\u90e82/3\u7535\u6e90\u5206\u538b\u70b9\u76f8\u63a5\uff0c\u63a5\u5165VD1\u540e\uff0c\u5219\u8be5\u70b9\u5c06\u88ab\u7b9d\u4f4d\u57285.3V\uff080.6-0.7=5.3V\uff09\uff0c\u5176\u4e2d0.7V\u662fVD1\u7684\u5bfc\u901a\u538b\u964d\u3002
\u8fd9\u6837\u5c31\u4f7f\u5f97\u9608\u503c\u7535\u538b\u4e5f\u76f8\u5e94\u63d0\u9ad8\u52305.3V\uff0c\u4ece\u800c\u4f7f\u5f97C1\u7684\u5145\u7535\u65f6\u95f4\u6709\u8f83\u5927\u5ef6\u957f\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u53ef\u4ee5\u5728\u76f8\u540cR\u3001C\u65f6\u95f4\u5e38\u6570\u4e0b\u4f7f\u5b9a\u65f6\u65f6\u95f4\u589e\u5927\u6570\u500d\u3002
\u8ba1\u65f6\u5f00\u59cb\u524d\uff0c\u5148\u6309\u52a8\u4e00\u4e0bS1\uff0c\u8ba1\u65f6\u5f00\u59cb\uff0c\u5b9a\u65f6\u65f6\u95f4\u5230\u65f6\uff0c555\u7b2c3\u811a\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u7ee7\u7535\u5668K\u7ebf\u5708\u5931\u7535\u65ad\u5f00\uff0c\u5b9e\u73b0\u88ab\u63a7\u8d1f\u8f7d\u5ef6\u65f6\u5173\u65ad\u7684\u529f\u80fd\u3002
\u589e\u5927C1\u7684\u5bb9\u91cf\u53ef\u4ee5\u83b7\u5f97\u66f4\u957f\u7684\u5ef6\u65f6\u65f6\u95f4\u3002
\u6269\u5c55\u8d44\u6599\u5206\u6bb5\u5f0f\u5b9a\u65f6\u5668
\u672c\u7535\u8def\u75312\u53ea555\u7535\u8def\u7ec4\u6210\uff0cU1\u3001R1\u3001RP1\u3001C1\u7b49\u7ec4\u6210\u7b2c\u4e00\u7ea7\u5355\u7a33\u6001\u5b9a\u65f6\u7535\u8def\uff0cU2\u3001R2\u3001RP2\u3001C3\u7b49\u7ec4\u6210\u7b2c\u4e8c\u7ea7\u5355\u7a33\u6001\u7535\u8def\uff0c\u4e24\u6781\u7535\u8def\u6784\u6210\u5206\u6bb5\u5b9a\u65f6\u7535\u8def\u3002
\u5206\u6bb5\u5f0f\u5b9a\u65f6\u5668\u539f\u7406\u56fe
\u539f\u7406\u4ecb\u7ecd
\u5f53\u6309\u4e0bS1\uff0c\u6301\u7eed1\u30012\u79d2\u949f\uff0cC1\u5145\u6ee1\u7535\u8377\uff0cU1\u7684\u7b2c2\u30016\u811a\u4e3a\u9ad8\u7535\u5e73\uff0c\u6545U1\u590d\u4f4d\uff0c\u7b2c3\u811a\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u901a\u8fc7R2\u3001RP2\u4f7fU2\u7f6e\u4f4d\uff0c\u7b2c3\u811a\u8f93\u51fa\u9ad8\u7535\u5e73\uff0c\u7ee7\u7535\u5668K\u7ebf\u5708\u5f97\u7535\u5438\u5408\uff0c\u5b9a\u65f6\u65f6\u95f4\u5f00\u59cb\u3002\u4e4b\u540e\uff0cC1\u901a\u8fc7RP1\u653e\u7535\uff0c\u5f53C1\u4e24\u7aef\u7535\u538b\u653e\u7535\u81f31/3\u76846V\u65f6\uff0cU1\u7ffb\u8f6c\uff0c\u7b2c3\u811a\u8f93\u51fa\u9ad8\u7535\u5e73\uff0c\u7b2c\u4e00\u9636\u6bb5\u65f6\u95f4\u7ed3\u675f\uff0c\u5176\u65f6\u957f\u4e3aT1=1.1xRP1xC1\u3002
\u63a5\u4e0b\u6765\uff0c\u7b2c\u4e8c\u9636\u6bb5\u5b9a\u65f6\u5f00\u59cb\uff0cU1\u7b2c3\u811a\u7684\u9ad8\u7535\u5e73\u901a\u8fc7R2\u3001RP2\uff0c\u5411C3\u5145\u7535\uff0c\u4f7f\u5f97\u7b2c6\u811a\u7535\u4f4d\u9010\u6e10\u4e0a\u5347\uff0c\u5347\u81f36V\u76842/3\u65f6\uff0cU2\u590d\u4f4d\uff0c\u7b2c3\u811a\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u7ee7\u7535\u5668K\u91ca\u653e\uff0c\u7b2c\u4e8c\u9636\u6bb5\u5b9a\u65f6\u65f6\u95f4\u5230\u3002\u8be5\u6bb5\u65f6\u957f\u4e3a\uff1aT2=1.1x(R2+RP2)xC3.
\u56e0\u6b64\uff0c\u603b\u65f6\u957f\u5c31\u4e3a\uff1aT\u603b=T1+T2\u3002\u672c\u7535\u8def\u53ef\u4ee5\u5b9e\u73b0\u7528\u8f83\u5c0f\u7684\u963b\u5bb9\u5143\u4ef6\u5b9e\u73b0\u8f83\u957f\u7684\u5b9a\u65f6\u65f6\u95f4\u3002
\u516c\u5f0f\uff1aT=1.1R1*C1
R1=36K\uff0cC1=100u \u7ea6\u4e3a4\u79d2\uff0c
\u5728R1\u5904\u4e32\u4e2a50K\u7684\u53ef\u8c03\u7535\u963b\u5373\u53ef\u53d8\u4e3a4-9.5\u79d2
2脚下降沿触发信号，3脚输出，触发後输出高电平，1秒後回复低电平。
其中C1=0.01uF,RT,CT自己取值算。
如同如同讨厌讨厌讨厌讨厌他
绛旓細瀹氭椂鏄敱澶栧洿鐨凴C鍏冧欢鍐冲畾鐨勶紝绠鍗曠殑璇达紝灏辨槸鏃堕棿甯告暟T锛漅 脳C锛屽綋C锛100uF锛孯锛200K鏃讹紝寤舵椂灏卞彲浠ヨ揪鍒20S銆傚湪缃戜笂鍙互杞绘槗鐨勬壘鍒555鐨勭浉鍏冲簲鐢紝姣斿锛歨ttp://www.ttet.cn/Article/JICHENDIANLU/LM555/200605/107.html 555鐨勪竴浜涘簲鐢ㄣ
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