å¯è°ç¨³åçµè·¯çæ ¸å¿ä¸ºä¸ç«¯å¯è°ç¨³ååLM317ãä»LM317çè¾åºçµåä¸ååååºåºåçµåï¼ç»VT1çå°æéåè¿åLM317ççµååºå端ï¼ä»èæ¹åLM317çè¾åºçµåãå¾2 - 64 ä¸å ±æ10个çµåå¼å ³ï¼å¼å ³IC4 ï¼KO~K9ï¼å¤äºäºéç¶æï¼åªè½æä¸ä¸ªå¼å ³éåï¼ä»èè¾åºæä¸åºå®çµåãæå¾2-64ä¸çµé»è£ é ï¼åLM317çè¾åºçµåä»5Vè³14Vï¼å ±å10æ¡ï¼ æ¯æ¡å¢å 1Vã
ããçµåå¼å ³çå¼å¯éåç±ä¸çCD4017æ§å¶ãå¼æºæ¶CD4017å¤ä½ï¼VS1亮ï¼æ示çµè·¯å·¥ä½ï¼. CD4017ç3èï¼Q0ï¼è¾åºé«çµå¹³ï¼å¯¹åºçK0éåï¼LM317è¾åº5VçµåãIC3ç4个ä¸éé¨ææRS触åå¨ï¼æ¤æ¶IC3aè¾åºé«çµå¹³ï¼IC3bè¾åºä½çµå¹³ï¼æ ¹æ®RS触åå¨çç¹æ§ï¼IC3cè¾åºä½çµå¹³ãVS1ãVS2åVS4-~VS7 6个åå äºæ管æåå¦å¾2-65æ示ï¼VS1ãVS2åç为5,VS4-VS7åå«ä¸º+1Vã+2Vã+3Vã+4Vã LM317è¾åº5Væ¶ï¼VS1亮ï¼å ¶ä½åçï¼è¯»å¾è¾åºçµå为5Vã
ããå½æä¸SBä¸æ¬¡ï¼CD4017çQ0为ä½çµå¹³ï¼Q1为é«çµå¹³ï¼K1éåãæ¤å¯¸VS1ãVS4亮ï¼ä»æ示ç¯ä¸å¯è¯»è¾åºçµå为5å1=6V,å次æä¸SBï¼åCD4017çQ2 为é«çµå¹³ï¼K2å¸åãæ¤æ¶VS1ãVS5亮ï¼ä»æ示ç¯ä¸å¯è¯»å¾è¾åºçµå为5 + 2 = 7Vã
ããå½CD4017çQ5è¾åºé«çµå¹³æ¶ï¼K5éåãIC3aè¾åºä½çµå¹³ï¼IC3b è¾åºé«çµå¹³ãæ ¹æ®RS触åå¨ç¹æ§ï¼å¯ç¥IC3cè¾åºé«çµå¹³ï¼æ¤æ¶åå äºäºæè·ç®¡VS1ãVS2亮ï¼VS4-VS7çï¼å¯è¯»åº1LM317è¾åºçµå为5 + 5 = 10Vãå ¶ä½ç¶æå¯ä»è¡¨2-5ä¸æ»åºã
ããå½VD4017çè¾åºå¾ªç¯ä¸ééåè¿åQ0端ï¼å³Q0è¾åºä½çµå¹³æ¶ï¼K0éåï¼åæ¶è¿«ä½¿ç±IC3 ç4个ä¸éé¨ç»¢æçRS触åå¨å¤ä½ï¼VS2çï¼æ示ç¯ä¸åªæVS1亮ï¼æ示LM317è¾åºçµå为5Vã
ããæ´ä¸ªçµè·¯çä¼¼å¤æï¼å ¶å®å¶ä½èµ·æ¥å¾ç®åãTç¨Eå14mmx14mméæ°§ä½ç£è¯ï¼å级ç¨ç´å¾0,35mmæ¼å 线平ç»290åï¼æ¬¡çº§ç¨ç´å¾0.8mmçæ¼å 线å线并ç»ï¼ä¸ç»ä¸º26åï¼ä¸ç»ä¸º14åï¼å次级ä¹é´åºæ³¨æç»ç¼ãå¾2-64ä¸çR1~R11åºéç¨éå±èçµé»ï¼å¯ç¨ä¸²å¹¶èæ¹å¼è¾¾å°è§å®å¼ã
ãã使ç¨æ¶ï¼éå½è°æ´R3é»å¼ï¼ä½¿å¼å ³çµæºæ¬¡çº§è¾åºç´æµçµååå«ä¸º20Vå12Vï¼ä»¥æ»¡è¶³ç¨³åçµè·¯éæ±ã
从零学电子:LM317三端可调稳压器功能强大,用途广泛,你会用吗