一、 Umthamo webhodi yesekethe ye-LED yonakele
Ukungaphumeleli okubangelwa umonakalo we-capacitor yeyona nto iphezulu kwizixhobo zombane, ngakumbi umonakalo we-electrolytic capacitor.Umonakalo we-Capacitor ubonakaliswa njenge: 1. ukunciphisa umthamo;2. Ukulahlekelwa ngokupheleleyo kwamandla;3. Ukuvuza;4. Isiphaluka esifutshane.
二、 Ukumelana nomonakalo
Kuqhelekile ukubona abaninzi abaqalayo bexhamla kunye ne-resistors ngelixa belungisa iibhodi zeesekethe, mhlawumbi zidiliza okanye zidibanise.Enyanisweni, ngokulungiswa okungakumbi, nje ukuba uqonda iimpawu zomonakalo we-resistors, awudingi ukukhathazeka kakhulu.Ukuchasana lelona candelo lininzi kwizixhobo zombane, kodwa akusiyo icandelo elinomlinganiselo ophezulu womonakalo.Umonakalo wokuchasa uxhaphake kakhulu kwiisekethe ezivulekileyo, kunye nokunyuka kwamaxabiso okuxhathisa kunqabile kwaye ukuhla kwamaxabiso okuxhathisa kunqabile.Iintlobo eziqhelekileyo zibandakanya i-carbon film resistors, i-resistors yefilimu yensimbi, i-resistors yenxeba yocingo, kunye ne-fuse resistors.Sinokuqala ukujonga ukuba kukho naziphi na iimpawu zokutshisa umnyama kwi-low resistance resistance kwibhodi yesiphaluka.Ngokusekelwe kwiimpawu zeesekethe ezininzi ezivulekileyo okanye ukunyuka kokuchasana xa ukuxhathisa konakalisiwe, kunye nokuthambekela kokuchasana okuphezulu ukonakala lula, sinokusebenzisa i-multimeter ukulinganisa ngokuthe ngqo amaxabiso okumelana kuzo zombini iziphelo zokuxhathisa okuphezulu. ibhodi yesekethe.Ukuba ixabiso lokuchasana elilinganisiweyo likhulu kunexabiso eliqhelekileyo lokuchasana, Ukuba ukuchasana konakaliswe ngokuqinisekileyo (kufuneka kuqatshelwe ukulinda de ixabiso lokumelana libonisa ukuzinza ngaphambi kokwenza isigqibo, njengoko kunokubakho inkqubo yokutshaja kunye nokukhupha ngokuhambelana ne-capacitor. amacandelo kwisekethe), ukuba ixabiso elilinganisiweyo lokumelana lincinci kunexabiso eliqhelekileyo lokuchasa, ngokuqhelekileyo alihoywa.Ngale ndlela, yonke i-resistor kwibhodi yesekethe ilinganiswa kanye, kwaye nokuba ubulala ngengozi iwaka, awuyi kuphosa i-resistor enye.
三、 Indlela yokugweba uMgangatho weZikhulisi zokuSebenza
I-Amplifaya zineempawu "ze-virtual short" kunye "nekhefu elibonakalayo", eziluncedo kakhulu ekuhlalutyeni iisekethe zeamplifier ezisebenzayo.Ukuqinisekisa isicelo somgca, i-amplifier yokusebenza kufuneka isebenze kwi-loop evaliweyo (impendulo embi).Ukuba akukho ngxelo ingalunganga, i-amplifier esebenzayo phantsi kwe-open-loop amplification iba ngumthelekisi.Ukuba ufuna ukugweba umgangatho wesixhobo, kufuneka uqale ukwahlula ukuba isixhobo sisetyenziswe njenge-amplifier okanye umqhathanisi kwisekethe.Ngokomgaqo we-amplifier virtual short, oko kukuthi, ukuba i-amplifier yokusebenza isebenza ngokufanelekileyo, i-voltage kwi-input efanayo kunye ne-reverse input terminals kufuneka ilingane, nokuba kukho umahluko, isekho kwinqanaba le-mv. .Ewe kunjalo, kwezinye iisekethe eziphezulu ze-impedance, ukuchasana kwangaphakathi kwe-multimeter kunokuba nefuthe elincinci kuvavanyo lombane, kodwa ngokuqhelekileyo aludluli i-0.2V.Ukuba kukho umahluko we-0.5V okanye ngaphezulu, iamplifier ngokuqinisekileyo iya kusilela!Ukuba isixhobo sisetyenziswa njengesithelekisi, sivumelekile ukuba sibe neetheminali zegalelo ezingalinganiyo kwicala elinye kunye nezalathiso ezibuyela umva.Ukuba i-voltage efanayo inkulu kune-voltage ye-reverse, i-voltage ephumayo isondele kwixabiso eliphezulu elihle;Ukuba i-voltage efanayo
四、Ingcebiso yokuvavanya amacandelo e-SMT nge-multimeter
Amanye amacandelo e-SMD mancinci kakhulu, okwenza kube nzima ukusebenzisa iiprobes eziqhelekileyo ze-multimeter kuvavanyo kunye nokugcinwa.Okokuqala, zinokubangela ngokulula iisekethe ezimfutshane, kwaye okwesibini, akulunganga ukuba iibhodi zeesekethe ezigqunywe nge-insulation zidibane neenxalenye zetsimbi zezikhonkwane zecandelo.Nantsi indlela elula eya kuzisa lula kakhulu kuvavanyo.Thatha iinaliti ezimbini ezincinci zokuthunga, (iKholamu yeTekhnoloji yoLawulo oluNzulu lweShishini) kwaye uzibeke ngokuqinileyo ngokuchasene ne-multimeter pen.Emva koko, thatha ucingo oluncinci lobhedu kwintambo ye-multi-strand, ubophe ipeni kunye nenaliti yokuthunga kunye nocingo oluhle lobhedu, kwaye uzithengise ngokuqinileyo.Ngale ndlela, xa ulinganisa amacandelo e-SMT nge-stylus enencam yenaliti encinci, akusekho mngcipheko weesekethe ezimfutshane, kwaye incam yenaliti inokugqobhoza i-insulation coating kwaye ibethe ngokuthe ngqo iindawo eziphambili, ukuphelisa imfuno yokukhathazeka ngokukrala ifilimu.
五、Indlela yokuGcinwa kweFasi yeSekethe eFutshane yeBhodi yeSekethe
Ekugcinweni kwebhodi yesekethe, ukuba kukho isiphaluka esifutshane kunikezelo lwamandla oluqhelekileyo, kudla ngokuba yeyona mpazamo ixhaphakileyo, kuba izixhobo ezininzi zabelana ngonikezelo lwamandla afanayo, kwaye isixhobo ngasinye esisebenzisa lo mbane sikrokrela ukuba sisixhobo esifutshane.Ukuba akukho zixhobo ezininzi ebhodini, ukusebenzisa indlela ye "hoe the earth" inokufikelela ekugqibeleni kwi-short circuit point.Ukuba kukho amacandelo amaninzi kakhulu, nokuba "i-hoe umhlaba" inokukhuba imeko ixhomekeke kwithamsanqa.Nantsi indlela ecetyiswayo esebenza kakuhle.Ngokusebenzisa le ndlela, unokufumana isiphumo esiphindwe kabini ngesiqingatha somzamo kwaye kaninzi ufumana ngokukhawuleza iphoso.Kufuneka kubekho umbane oguquguqukayo kunye nombane, kunye ne-voltage ye-0-30V kunye ne-0-3A yangoku.Olu nikezelo lwamandla alubizi kwaye luxabisa malunga neeyuan ezingama-300.Lungisa i-voltage yesekethe evulekileyo kwinqanaba lombane wombane wesixhobo.Okokuqala, lungisa ikhoyo ngoku kuncinci.Faka lo mbane kwiindawo zobonelelo lwamandla ombane wesekethe, njengeetheminali ze-5V kunye ne-0V ze-chip ye-74 series.Ngokuxhomekeke kwiqondo lesiphaluka esifutshane, ngokuthe ngcembe ukwandisa ngoku.Bamba isixhobo ngesandla sakho.Xa isixhobo esithile sishushu kakhulu, sisoloko siyinto eyonakeleyo.Ungayisusa ukuze ufumane umlinganiselo ongaphezulu kunye nokuqinisekiswa.Ngokuqinisekileyo, i-voltage ngexesha lokusebenza akufanele idlule umbane osebenzayo wesixhobo, kwaye akufanele iguqulwe, ngaphandle koko iya kutshisa ezinye izixhobo ezilungileyo.
六、Irabha encinci yokusombulula iingxaki ezinkulu
Inani leebhodi ezisetyenziswa kulawulo lwemizi-mveliso liyanda, kwaye iibhodi ezininzi zisebenzisa indlela yokufaka iminwe yegolide kwiindawo zokubeka.Ngenxa yemekobume yemizi-mveliso erhabaxa, enothuli, efumileyo, kwaye idlakadlaka, kulula ukuba iibhodi zibe neziphene zokudibana.Abahlobo abaninzi basenokuba bayisombulule le ngxaki ngokutshintsha iibhodi, kodwa ixabiso lokuthenga iibhodi likhulu kakhulu, ingakumbi kwiibhodi zezixhobo ezisuka kwamanye amazwe.Enyanisweni, wonke umntu unokusebenzisa i-eraser ukuze asule ngokuphindaphindiweyo ukungcola kumnwe wegolide amaxesha ambalwa, ahlambulule, kwaye uzame umatshini kwakhona.Mhlawumbi ingxaki iza kusonjululwa!Indlela ilula kwaye iyasebenza.
七, Uhlalutyo lweempazamo zombane kunye nexesha elilungileyo nelibi
Ngokwezinto ezinokwenzeka, iziphene zombane ezahlukeneyo ezinamaxesha amahle kunye namabi zinokubandakanya ezi meko zilandelayo:
1. Uqhagamshelwano olubi phakathi kwebhodi kunye ne-slot, ukusilela ukudibanisa xa intambo iphukile ngaphakathi, uqhagamshelwano olubi phakathi kweplagi yocingo kunye ne-terminal, kunye ne-solder ephosakeleyo yamacandelo onke alolu hlobo;
2. Kwiisekethe zedijithali, ukungasebenzi kakuhle kwenzeka kuphela phantsi kweemeko ezithile ngenxa yokuphazamiseka komqondiso.Kunokwenzeka ukuba ukuphazamiseka okugqithisileyo kuye kwachaphazela ngokwenene inkqubo yokulawula kwaye kubangele ukuba yenze iimpazamo, kwaye kukho utshintsho kwiiparitha zecandelo ngalinye okanye iiparitha zokusebenza ezipheleleyo zebhodi yesekethe, ekhokelela kwindawo ebaluleke kakhulu kwikhono lokuchasana nokuphazamiseka kunye nesiphumo ukungasebenzi kakuhle;
3. Ukuzinza okungahambi kakuhle kwe-thermal yamacandelo Ukusuka kwinani elikhulu lezenzo zokulondoloza, ukuzinza kwe-thermal ye-electrolytic capacitor yokuqala kubi, kulandelwa ngamanye ama-capacitors, i-triodes, i-diodes, i-IC, i-resistors, njl.
4. Kukho umswakama, ukuqokelela uthuli, njl njl kwibhodi yesekethe.Ubumanzi kunye nothuli luya kuqhuba umbane kunye nefuthe lokumelana, kwaye ixabiso lokumelana liya kutshintsha ngexesha lokwandiswa kwe-thermal.Eli xabiso lokumelana nefuthe elihambelanayo kunye namanye amacandelo.Ukuba esi siphumo sinamandla, iiparamitha zesekethe ziya kutshintshwa, zibangele iimpazamo;
5. Isoftware yenye yezinto ekufuneka ziqwalaselwe.Iiparamitha ezininzi kwisekethe zihlengahlengiswa kusetyenziswa isoftware, kwaye umda wezinye iiparameters ubekwe phantsi kakhulu, ophakathi koluhlu olubalulekileyo.Xa iimeko zokusebenza zomatshini zidibana nesizathu sokuba isofthiwe inqume impazamo, i-alamu iya kuvela.
Ixesha lokuposa: Jun-21-2023
