555定时器怎么定时 如何用555定时器定时3秒钟
\u7528555\u5b9a\u65f6\u5668\u600e\u6837\u5b9e\u73b015\u79d2\u8ba1\u65f6\u7535\u8def\uff1f\u6025\u7528555\u5b9a\u65f6\u5668\u65f6\u95f4T=1.1*(R1+R2)*C\uff08\u79d2\uff09\uff0c\u5982\u679c\u53d6c=47uF=0.000047F
15\u79d2=1.1*(R1+R2)*0.000047
R1+R2=290k
\u518d\u53d6R1=100K
R2\u4e3a\u4e00\u4e2a220K\u53ef\u8c03\u7535\u4f4d\u5668\u5c31\u884c\u5c31\u53ef\u4ee5\u5b9e\u73b015\u79d2\u8ba1\u65f6\u7535\u8def\u3002
\u4e0d\u540c\u7684\u5236\u9020\u5546\u751f\u4ea7\u7684555\u82af\u7247\u6709\u4e0d\u540c\u7684\u7ed3\u6784\uff0c\u6807\u51c6\u7684555\u82af\u7247\u96c6\u6210\u670925\u4e2a\u6676\u4f53\u7ba1\uff0c2\u4e2a\u4e8c\u6781\u7ba1\u548c15\u4e2a\u7535\u963b\u5e76\u901a\u8fc78\u4e2a\u5f15\u811a\u5f15\u51fa(DIP-8\u5c01\u88c5)\u3002555\u7684\u6d3e\u751f\u578b\u53f7\u5305\u62ec556\uff08\u96c6\u6210\u4e86\u4e24\u4e2a555\u7684DIP-14\u82af\u7247\uff09\u548c558\u4e0e559\u3002
\u6269\u5c55\u8d44\u6599\uff1a
555\u5b9a\u65f6\u5668\u5de5\u4f5c\u6a21\u5f0f
1\u3001\u5355\u7a33\u6001\u6a21\u5f0f\uff1a\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c555\u529f\u80fd\u4e3a\u5355\u6b21\u89e6\u53d1\u3002\u5e94\u7528\u8303\u56f4\u5305\u62ec\u5b9a\u65f6\u5668\uff0c\u8109\u51b2\u4e22\u5931\u68c0\u6d4b\uff0c\u53cd\u5f39\u8df3\u5f00\u5173\uff0c\u8f7b\u89e6\u5f00\u5173\uff0c\u5206\u9891\u5668\uff0c\u7535\u5bb9\u6d4b\u91cf\uff0c\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236\uff08PWM\uff09\u7b49\u3002
2\u3001\u65e0\u7a33\u6001\u6a21\u5f0f\uff1a\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0c555\u4ee5\u632f\u8361\u5668\u7684\u65b9\u5f0f\u5de5\u4f5c\u3002\u8fd9\u4e00\u5de5\u4f5c\u6a21\u5f0f\u4e0b\u7684555\u82af\u7247\u5e38\u88ab\u7528\u4e8e\u9891\u95ea\u706f\u3001\u8109\u51b2\u53d1\u751f\u5668\u3001\u903b\u8f91\u7535\u8def\u65f6\u949f\u3001\u97f3\u8c03\u53d1\u751f\u5668\u3001\u8109\u51b2\u4f4d\u7f6e\u8c03\u5236\uff08PPM\uff09\u7b49\u7535\u8def\u4e2d\u3002\u5982\u679c\u4f7f\u7528\u70ed\u654f\u7535\u963b\u4f5c\u4e3a\u5b9a\u65f6\u7535\u963b\uff0c555\u53ef\u6784\u6210\u6e29\u5ea6\u4f20\u611f\u5668\uff0c\u5176\u8f93\u51fa\u4fe1\u53f7\u7684\u9891\u7387\u7531\u6e29\u5ea6\u51b3\u5b9a\u3002
3\u3001\u53cc\u7a33\u6001\u6a21\u5f0f\uff08\u6216\u79f0\u65bd\u5bc6\u7279\u89e6\u53d1\u5668\u6a21\u5f0f\uff09\uff1a\u5728DIS\u5f15\u811a\u7a7a\u7f6e\u4e14\u4e0d\u5916\u63a5\u7535\u5bb9\u7684\u60c5\u51b5\u4e0b\uff0c555\u7684\u5de5\u4f5c\u65b9\u5f0f\u7c7b\u4f3c\u4e8e\u4e00\u4e2aRS\u89e6\u53d1\u5668\uff0c\u53ef\u7528\u4e8e\u6784\u6210\u9501\u5b58\u5f00\u5173\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1-555\u5b9a\u65f6\u5668
\u4f7f\u7528\u5355\u7a33\u6001\u7535\u8def\u5373\u53ef\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a
\u6839\u636e\u4e0a\u56fe\u7535\u8def\uff0c\u6b63\u5e38\u65f6\uff0c3\u811a\u4e3a\u4f4e\u7535\u5e73\uff0c\u5f53S\u6309\u4e0b\u540e\uff0c3\u811a\u4e3a\u9ad8\u7535\u5e73\uff0c\u7ecf\u4e00\u5b9a\u5ef6\u65f6\u540e\u6062\u590d\u4f4e\u7535\u5e73\uff0c\u4ece\u800c\u5b9e\u73b0\u6240\u9700\u8981\u7684\u529f\u80fd\u3002
\u6269\u5c55\u8d44\u6599
555\u5b9a\u65f6\u5668\u662f\u4e00\u79cd\u96c6\u6210\u7535\u8def\u82af\u7247\uff0c\u5e38\u88ab\u7528\u4e8e\u5b9a\u65f6\u5668\u3001\u8109\u51b2\u4ea7\u751f\u5668\u548c\u9707\u8361\u7535\u8def\u3002555\u53ef\u88ab\u4f5c\u4e3a\u7535\u8def\u4e2d\u7684\u5ef6\u65f6\u5668\u4ef6\u3001\u89e6\u53d1\u5668\u6216\u8d77\u632f\u5143\u4ef6\u3002
555\u5b9a\u65f6\u5668\u7531Hans R. Camenzind\u4e8e1971\u5e74\u4e3a\u897f\u683c\u5c3c\u8482\u514b\u516c\u53f8\u8bbe\u8ba1\u3002\u897f\u683c\u5c3c\u8482\u514b\u516c\u53f8\u540e\u6765\u88ab\u98de\u5229\u6d66\u516c\u53f8\u6240\u5e76\u8d2d\u3002
\u4e0d\u540c\u7684\u5236\u9020\u5546\u751f\u4ea7\u7684555\u82af\u7247\u6709\u4e0d\u540c\u7684\u7ed3\u6784\uff0c\u6807\u51c6\u7684555\u82af\u7247\u96c6\u6210\u670925\u4e2a\u6676\u4f53\u7ba1\uff0c2\u4e2a\u4e8c\u6781\u7ba1\u548c15\u4e2a\u7535\u963b\u5e76\u901a\u8fc78\u4e2a\u5f15\u811a\u5f15\u51fa(DIP-8\u5c01\u88c5)\u3002555\u7684\u6d3e\u751f\u578b\u53f7\u5305\u62ec556\uff08\u96c6\u6210\u4e86\u4e24\u4e2a555\u7684DIP-14\u82af\u7247\uff09\u548c558\u4e0e559\u3002
NE555\u7684\u5de5\u4f5c\u6e29\u5ea6\u8303\u56f4\u4e3a0-70\u00b0C\uff0c\u519b\u7528\u7ea7\u7684SE555\u7684\u5de5\u4f5c\u6e29\u5ea6\u8303\u56f4\u4e3a−55\u5230+125 \u00b0C\u3002555\u7684\u5c01\u88c5\u5206\u4e3a\u9ad8\u53ef\u9760\u6027\u7684\u91d1\u5c5e\u5c01\u88c5\uff08\u7528T\u8868\u793a\uff09\u548c\u4f4e\u6210\u672c\u7684\u73af\u6c27\u6811\u8102\u5c01\u88c5\uff08\u7528V\u8868\u793a\uff09\uff0c\u6240\u4ee5555\u7684\u5b8c\u6574\u6807\u53f7\u4e3aNE555V\u3001NE555T\u3001SE555V\u548cSE555T\u3002\u4e00\u822c\u8ba4\u4e3a555\u82af\u7247\u540d\u5b57\u7684\u6765\u6e90\u662f\u5176\u4e2d\u7684\u4e09\u679a5K\u03a9\u7535\u963b\uff0c\u4f46Hans Camenzind\u5426\u8ba4\u8fd9\u4e00\u8bf4\u6cd5\u5e76\u58f0\u79f0\u4ed6\u662f\u968f\u610f\u53d6\u7684\u8fd9\u4e09\u4e2a\u6570\u5b57\u3002
555\u8fd8\u6709\u4f4e\u529f\u8017\u7684\u7248\u672c\uff0c\u5305\u62ec7555\u548c\u4f7f\u7528CMOS\u7535\u8def\u7684TLC555\u30027555\u7684\u529f\u8017\u6bd4\u6807\u51c6\u7684555\u4f4e\uff0c\u800c\u4e14\u5176\u751f\u4ea7\u5546\u5ba3\u79f07555\u7684\u63a7\u5236\u5f15\u811a\u5e76\u4e0d\u50cf\u5176\u4ed6555\u82af\u7247\u90a3\u6837\u9700\u8981\u63a5\u5730\u7535\u5bb9\uff0c\u540c\u65f6\u4f9b\u7535\u4e0e\u5730\u4e4b\u95f4\u4e5f\u4e0d\u9700\u8981\u6d88\u9664\u566a\u58f0\u7684\u53bb\u8026\u7535\u5bb9\u3002
\u53c2\u8003\u8d44\u6599555\u5b9a\u65f6\u5668 \u767e\u5ea6\u767e\u79d1
看这个图，以前画的，不太工整。
定时时间主要取决与R6和C1这两个取值大小。
理论上电阻越大，电容越大，定时时间也越长。
定时时间计算公式t=1.1R*C
假设电阻100k，电容100uf，定时时间约11秒
随便买本数字电路的书都有哦介绍555的。
555真是好东西，应用千变万化。
绛旓細555瀹氭椂鍣ㄦ椂闂碩=1.1*(R1+R2)*C锛堢锛锛屽鏋滃彇c=47uF=0.000047F 15绉=1.1*(R1+R2)*0.000047 R1+R2=290k 鍐嶅彇R1=100K R2涓轰竴涓220K鍙皟鐢典綅鍣ㄥ氨琛屽氨鍙互瀹炵幇15绉掕鏃剁數璺備笉鍚岀殑鍒堕犲晢鐢熶骇鐨555鑺墖鏈変笉鍚岀殑缁撴瀯锛屾爣鍑嗙殑555鑺墖闆嗘垚鏈25涓櫠浣撶锛2涓簩鏋佺鍜15涓數闃诲苟閫氳繃8涓紩鑴...
绛旓細杩炴帴鐢佃矾锛氬皢555瀹氭椂鍣鑺墖鎻掑叆鎻掑骇鎴栫剨鎺ュ湪鐢佃矾鏉夸笂锛岀劧鍚庢寜鐓т互涓嬫柟寮忚繛鎺ュ叾浠栧厓浠讹細杩炴帴鐢垫簮姝ｆ瀬锛圴CC锛夊埌555鑺墖鐨勬鏋佸紩鑴氾紙閫氬父鏄紩鑴8锛夈傝繛鎺ョ數婧愯礋鏋侊紙GND锛夊埌555鑺墖鐨勮礋鏋佸紩鑴氾紙閫氬父鏄紩鑴1锛夈傝繛鎺ヤ竴涓數瀹瑰櫒鐨勪竴绔埌555鑺墖鐨勮礋鏋佸紩鑴氾紙閫氬父鏄紩鑴1锛夈傝繛鎺ョ數瀹瑰櫒鐨勫彟涓绔埌555鑺墖鐨勬帶鍒剁數鍘...
绛旓細555鍜7555鏄崟瀹氭椂鍣锛556鍜7556鏄弻瀹氭椂鍣ㄣ傚弻鏋佸瀷鐨勭數鍘嬫槸+5V~+15V锛岃緭鍑虹殑鏈澶х數娴佸彲杈200mA锛孋MOS鍨嬬殑鐢垫簮鐢靛帇鏄+3V~+18V銆555鐢佃矾鐨勫唴閮ㄧ數璺柟妗嗗浘濡傚浘8-1鎵绀恒傚畠鍚湁涓や釜鐢靛帇姣旇緝鍣紝涓涓熀鏈琑S瑙﹀彂鍣紝涓涓斁鐢靛紑鍏砊锛屾瘮杈冨櫒鐨勫弬鑰冪數鍘嬬敱涓夊彧5K惟鐨勭數闃诲櫒鏋勬垚鍒嗗帇锛屽畠浠垎鍒娇楂樼數骞虫瘮杈...
绛旓細杩欎釜璁捐鏄瘮杈冪畝鍗曠殑锛屽湪鏁扮數妯＄數鐨勮鏈噷閮芥湁涓撻棬璁555瀹氭椂鍣鐨勶紝555瀹氭椂鍣ㄧ殑鍚勭浣跨敤鏂规硶涔熼兘鏈変粙缁嶃備笅闈㈡垜绠鍗曡涓涓嬭璁＄煩褰㈣剦浜х敓鐢佃矾锛堝彧鏄悊璁鸿璁′笉鑰冭檻瀹為檯鎯呭喌锛夛紝鐢憋細T=T1+T2=0.7(R1+2R2)C=1S锛汿1/(T1+T2)=2/3杩欎袱涓叕寮忥紝鍙В寰桼1+R2=952K惟锛孯2=476K惟锛屾寜鐓ц繖涓暟鍊煎幓璁...
绛旓細灏 555 瀹氭椂鍣ㄧ粍浠舵嫋鏀惧埌鐢佃矾鏉夸笂銆鍙屽嚮 555 瀹氭椂鍣ㄧ粍浠讹紝鎵撳紑瀹冪殑灞炴х獥鍙ｃ傚湪灞炴х獥鍙ｄ腑锛屾偍鍙互璁剧疆瀹氭椂鍣ㄧ殑鏃堕棿銆傚湪鈥淭iming鈥濋夐」鍗′腑锛屾偍鍙互璁剧疆瀹氭椂鍣ㄧ殑宸ヤ綔鏂瑰紡锛堝崟绋虫佹垨澶氳皭鎸級锛屼互鍙婄簿搴︼紙楂樸佷腑鎴栦綆锛夈傚湪鈥淭iming鈥濋夐」鍗＄殑鈥淭iming Parameters鈥濋儴鍒嗭紝鎮ㄥ彲浠ヨ缃畾鏃跺櫒鐨勬椂闂村父鏁般傝緭鍏...
绛旓細涓绘暟鎹簱閲岄潰鏈変釜Mixed锛屽湪杩欎釜缁勯噷闈㈢殑timer涓嬮潰灏辨槸555瀹氭椂鍣銆侼E555涓8鑴氭椂鍩洪泦鎴愮數璺痭e555鏃跺熀鐢佃矾灏佸舰寮忔湁涓ょ锛屼竴鏄痙ip鍙屽垪鐩存彃8鑴氬皝瑁咃紝鍙︿竴绉嶆槸sop-8灏忓瀷锛坰md锛夊皝瑁呭舰寮忋傚叾瀹僪a17555銆乴m555銆乧a555鍒嗗睘涓嶅悓鐨勫叕鍙哥敓浜х殑浜у搧銆傚唴閮ㄧ粨鏋勫拰宸ヤ綔鍘熺悊閮界浉鍚屻
绛旓細1.绉掕剦鍐插彂鐢熷櫒 绉掕剦鍐蹭骇鐢熺數璺敱555瀹氭椂鍤ｅ拰澶栨帴鍏冧欢R1銆丷2銆丆鏋勬垚澶氳皭鎸崱鍣ㄣ傝緭鍑鸿剦鍐茬殑棰戠巼涓猴細缁忚繃璁＄畻寰楀埌f鈮1Hz鍗1绉掋2.璁℃暟鍣 璁℃暟鍣ㄧ敱涓ょ墖74LS192鍚屾鍗佽繘鍒跺彲閫嗚鏁板櫒鏋勬垚銆傚埄鐢ㄥ噺璁℃暟Rd=0锛屽弽鍚=0锛孋Pd=1锛屽疄鐜拌鏁板櫒鎸8421鐮侀掑噺杩涜鍑忚鏁般傚埄鐢ㄥ熶綅杈撳嚭绔弽鍚態O涓庝笅涓绾х殑CPd杩炴帴...
绛旓細浣跨敤鍗曠ǔ鎬佺數璺嵆鍙傚涓嬪浘鎵绀猴細鏍规嵁涓婂浘鐢佃矾锛屾甯告椂锛3鑴氫负浣庣數骞筹紝褰揝鎸変笅鍚庯紝3鑴氫负楂樼數骞筹紝缁忎竴瀹氬欢鏃跺悗鎭㈠浣庣數骞筹紝浠庤屽疄鐜版墍闇瑕佺殑鍔熻兘銆
绛旓細1銆侀鍏堥渶瑕侀夋嫨鈥滆彍鍗曟爮鈥->鈥滃伐鍏封->"555瀹氭椂鍣鍚戝"閫夐」锛屽鍥炬墍绀恒2銆佹帴涓嬫潵闇瑕佽缃綘闇瑕佺殑鍙傛暟锛屽鍥炬墍绀猴紝瀹屾垚鍚庣偣鍑烩滄惌寤虹數璺濋夐」銆3銆佹帴涓嬫潵闇瑕佹斁缃埌鍥句腑鍚庯紝閫夋嫨鈥滅ず娉㈠櫒鈥濆伐鍏疯蒋浠讹紝濡傚浘鎵绀恒4銆佺偣鍑诲彸涓婅鐨勨滀笁瑙掆濈鍙凤紝杩愯鎴戜滑璁捐鐨勭數璺紝鍙屽嚮绀烘尝鍣紝璺冲嚭娉㈠舰鏄剧ず妗嗭紝濡傚浘...
绛旓細555瀹氭椂鍣鏄竴绉嶇數瀛璁℃椂鍣IC锛堥泦鎴愮數璺級锛屽畠鍙互鐢熸垚鍑嗙‘鐨勬椂闂撮棿闅旀垨棰戠巼銆傚畠鐢变笁涓富瑕侀儴鍒嗙粍鎴愶細涓涓Е鍙戝櫒锛屼竴涓Е鍙戝櫒鏀惧ぇ鍣ㄥ拰涓涓帶鍒跺櫒銆傝Е鍙戝櫒鏄竴涓ǔ瀹氱殑鎸崱鐢佃矾锛屽畠鍙互浜х敓涓涓珮棰戠殑鑴夊啿淇″彿銆傝Е鍙戝櫒鏀惧ぇ鍣ㄦ妸杩欎釜鑴夊啿淇″彿鏀惧ぇ锛屽苟閫氳繃鎺у埗鍣ㄦ潵璋冭妭鑴夊啿棰戠巼銆傞氳繃杩炴帴涓嶅悓鐨勫閮ㄥ厓鍣ㄤ欢鏉...
