我用555做的振荡器输出4V多脉冲给CD4017BE的14脚 ，然而只有3脚输出高电平，其他引脚均为低电平。为什么？ 这是一个555的脉冲，谁知道原理可以解释一下，最好附带公式，...
CD4017BE \u7684\u95ee\u9898\u4f30\u8ba1\u4f60\u7684\u7535\u8def\u8fde\u5f97\u4e0d\u5bf9\u3002\u5efa\u8bae\u7528\u4e0bEWB\u8f6f\u4ef6\u4eff\u771f\u4e0b\uff01\u8fd9\u4e2a\u8f6f\u4ef6\u4eff\u771f\u6570\u5b57\u82af\u7247\u592a\u597d\u7528\u4e86\uff01\u4f60\u5230\u7f51\u4e0a\u4e0b\u4e0b\u6765\u5b9e\u9a8c\u5c31\u77e5\u9053\u4e86\uff01\uff01\u4e5f\u5f88\u7b80\u5355\u76f4\u89c2\uff01\u6bd4\u52a8\u624b\u710a\u677f\u5b50\u7b80\u5355\u3002
\u8fd9\u662f\u4e00\u4e2a\u7531NE555\u6784\u6210\u7684\u591a\u8c10\u632f\u8361\u5668\uff0c\u5176\u7b2c8\u811a\u548c\u7b2c1\u811a\u63a5\u5165\u76f4\u6d41\u7535\u6e90\u6b63\u3001\u8d1f\u6781\uff0c\u7b2c3\u811a\u8f93\u51fa\u65b9\u6ce2\u8109\u51b2\u7535\u538b\uff0c\u7b2c4\u811a\u4e3a\u590d\u4f4d\u7aef\uff08\u7b2c4\u811a\u63a5\u4f4e\u7535\u5e73\u5219555\u505c\u6b62\u5de5\u4f5c\u65e0\u8f93\u51fa\uff0c\u63a5\u9ad8\u7535\u5e73\u6b63\u5e38\u5de5\u4f5c\uff09\uff0c\u7b2c5\u811a\u63a5\u9000\u8026\u7535\u5bb9\uff080.01\u03bcF\u5373\u53ef\uff09\u3002
\u63a5\u901a\u7535\u8def\u540e\uff0c\u5b9a\u65f6\u7535\u5bb9C1\u901a\u8fc7R1\u3001R6\u548cR7\u5f00\u59cb\u5145\u7535\uff0c\u5f53C1\u7684\u7535\u538b\u5145\u52302Vcc/3\u4e4b\u524d\uff0c555\u7684\u7b2c2\u548c6\u811a\u7535\u538b\u4f4e\u4e8e2Vcc/3\uff0c\u6b64\u65f6555\u7684\u7b2c3\u811a\u548c\u7b2c7\u811a\u8f93\u51fa\u9ad8\u7535\u5e73\u3002\u5f53C1\u7535\u538b\uff08\u7b2c2\u548c6\u811a\u7535\u538b\uff09\u5145\u81f32Vcc/3\u4e4b\u540e\uff0c555\u72b6\u6001\u7ffb\u8f6c\uff0c\u7b2c3\u811a\u548c\u7b2c7\u811a\u8f93\u51fa\u4f4e\u7535\u5e73\uff0cC1\u5f00\u59cb\u901a\u8fc7R6\u548cR7\u548c555\u7684\u7b2c7\u811a\u5bf9\u5730\u653e\u7535\uff0c\u76f4\u81f3C1\u7535\u538b\u964d\u4f4e\u81f3Vcc/3\u65f6555\u72b6\u6001\u518d\u6b21\u7ffb\u8f6c\uff0c\u7b2c3\u811a\u548c7\u811a\u518d\u6b21\u8f93\u51fa\u9ad8\u7535\u5e73\uff0cC1\u91cd\u65b0\u901a\u8fc7R1\u3001R6\u548cR7\u5145\u7535\uff0c\u7136\u540e\u4e0d\u65ad\u91cd\u590d\u4e0a\u8ff0\u8fc7\u7a0b\uff0c555\u4e0d\u65ad\u7ffb\u8f6c\uff0c\u7b2c3\u811a\u5c31\u4f1a\u8f93\u51fa\u65b9\u6ce2\u8109\u51b2\u3002
\u8109\u51b2\u7684\u9ad8\u7535\u5e73\u5bbd\u5ea6 tH=0.693(R1+R6+R7)C1
\u4f4e\u7535\u5e73\u5bbd\u5ea6 tL=0.693(R6+R7)C1
\u8109\u51b2\u5468\u671f T=tH+tL=0.693(R1+2R6+2R7)C1
\u8109\u51b2\u9891\u7387 f=1/T=1.44 /\u30100.693(R1+2R6+2R7)C1\u3011
\u5360\u7a7a\u6bd4\u4e3a (R1+R6+R7)/(R1+2R6+2R7)\u3002
\u901a\u8fc7\u8c03\u8282\u53d8\u963b\u5668\uff08\u7535\u4f4d\u5668\uff09R7\u7684\u963b\u503c\uff0c\u5c31\u53ef\u4ee5\u8c03\u8282\u8f93\u51fa\u8109\u51b2\u7684\u9891\u7387\u4ee5\u53ca\u5360\u7a7a\u6bd4\u3002
555只有8个引脚，556有14个引脚，14脚接VCC，7脚接GND，1、2脚是OUT，自激振荡不需接脉冲
CD4017,十进制计数器,工作时要把复位脚15脚置为低电平,时钟禁止脚13脚置为低电平.此两个脚你置了没有,没置不能正常工作.
不知你怎么接的
绛旓細555鍙湁8涓紩鑴氾紝556鏈14涓紩鑴氾紝14鑴氭帴VCC锛7鑴氭帴GND锛1銆2鑴氭槸OUT锛岃嚜婵鎸崱涓嶉渶鎺ヨ剦鍐
绛旓細寰堢畝鍗曠殑鍟,鐢555鏃跺熀鐢佃矾鍋氫竴涓10MHZ鐨勬柟娉杈撳嚭,鍚庨潰鎺ヤ竴涓皠鏋佽窡闅忓櫒,璋冩暣杈撳嚭鐢靛帇涓4V.鍦ㄦ帴涓涓Н鍒嗙數璺氨鏄敮榻挎尝浜.
绛旓細浣犵數婧愮數鍘嬫槸澶氬皯锛5鑴氭槸鎺у埗鐢靛帇锛屽湪鍐呴儴5鑴氱數鍘嬫槸2/3VCC锛屽鏋滆繖鐢靛帇鍙樹簡浼氬奖鍝2鑴氬拰6鑴氱殑闃鍊
绛旓細鎴戜篃閬囧埌杩囧拰浣犱竴鏍风殑闂锛屾渶缁堝彂鐜版槸鐢甸樆璁剧疆寰楀お澶э紝浣犲彲浠ュ弬鑰冧笅鎴戠殑鐢佃矾鍥惧氨鏄庣櫧浜
绛旓細鐢555瀹氭椂鍣ㄥ埗浣滅殑10Hz鏂规尝鍙戠敓鍣ㄧ數璺粨鏋勫強鍙傛暟濡備笅銆
绛旓細鐢555鏋勫缓鍛ㄦ湡0.2绉鐨勫璋鎸崱鍣锛3鑴杈撳嚭缁4017CP绔紝绗竴鍛ㄦ湡鍏惰緭鍑0楂樼數骞筹紝鍏跺畠杈撳嚭鐢靛钩浣庯紝绗簩鍛ㄦ湡鍏惰緭鍑1楂樼數骞筹紝鍏跺畠杈撳嚭鐢靛钩浣庯紝鈥︹︾浜斿懆鏈熷綋杈撳嚭4楂樼數骞虫椂锛岃繛鎺ュ洓涓伅锛岀鍏懆鏈熸椂锛岃繛鎺ユ竻闆剁鍗冲彲鍥炲埌杈撳嚭1楂樼數骞筹紝鐢变簬锛岃緭鍑洪渶瑕侀┍鍔ㄧ數娴佸ぇ锛屾墍浠ワ紝闇瑕佺敤涓夋瀬绠9013澧炲姞椹卞姩鑳藉姏锛屽熀鏋...
绛旓細鐢555澶璋鎸崱鍣瑕佷骇鐢熻剦鍐查鐜囧湪1~1000HZ鍐呭彲璋, 555闇囪崱鍣ㄧ殑涓涓渿鑽″懆鏈熶负 T=0.693锛圧1+R2)C 鎸変綘鐨勯鐜 1 ~ 1K锛屾煡浜嗕竴涓嬫洸绾匡紝鐢靛搴斿彇鍊10寰硶锛孯1+R2鐨勫彇鍊煎簲涓 1M娆с備及璁′笉鑳界ǔ瀹氥
绛旓細鍥犱负涓鑸殑涓囩敤琛ㄦ祴閲忎氦娴佺數鍘嬶紝瑕佹眰鏄25HZ~500HZ鐨勬寮︾數鍘嬶紝浣犺繖涓浘鏄敱555鏃跺熀鐢佃矾缁勬垚鐨勬尟鑽″櫒锛屽畠鍑烘潵鐨勬尝褰㈠彲鑳芥槸鏂规尝锛岃屼笉鏄寮︽尝锛堟垜娌℃湁浠旂粏鍒嗘瀽锛岀寽鎯崇殑锛夛紝鑰屼笖浣犺鐨勭敤1nF鐢靛鏃跺乏杈硅〃鐨勯鐜囧兼槸58KHZ锛屽凡缁忚秴杩囦竾鐢ㄨ〃娴嬮噺鏉′欢鐨勫崄鍊嶄互涓娿3銆佷竴涓槸鏂规尝锛屽彟涓涓槸棰戠巼涓58KHZ锛屾棭宸...
绛旓細鐢74LS161灏嗗競鐢典俊鍙10鍒嗛,浠庤繘浣杈撳嚭灏卞彲寰5HZ鑴夊啿浜.瑙佸浘:
绛旓細555鎺ユ垚澶氳皭鎸崱鍣锛孷cc=12V锛屽綋鐢靛寮濮嬪厖鐢碉紝2銆6绔數鍘嬩粠4V鍗囪嚦8V鏃讹紝555杈撳嚭鐘舵佺炕杞紝鐢"1"鍙樻垚鈥0鈥濄
