Ukuphawula resistors - iindlela ezintathu eziphambili

Wonke ubani ababandakanyekayo nokulungisa izixhobo zombane, yazini ukuba ngamanye amaxesha kuyimfuneko ukumisela engaphandle Ngenxa resistor yokuba ihlelo lakhe. Indlela elula ukulinganisa umlo kunye ohmmeter, kodwa ingxaki akusoloko kusenzeka ukuba unsolder kuyo ngaphandle kokonakalisa ibhodi wesiphaluka, ingakumbi multi-sixhobo sekhombuya, kodwa kuyenzeka ukuba kukho amathandabuzo malunga ngengqibelelo abafowunelwa lwangaphakathi. Ukuba unayo kwisekethe, yinto elula - ungakhangela kuyo uze ubone ukuba R18 kukuthi, umzekelo, ohms 47. Ukuba ayiwenzi, kwaye kufuneka ukuqonda, nesigqibo seengcinga kuya kufuneka ukuba sisondele?

Ngethamsanqa, abenzi zamacandelo elektroniki-nye, kwaye kukho umgangatho resistors lokumakishela. Liyinyaniso elokuba, ukuba unenzondelelo utshintsho kumashumi eminyaka akutshanje.

Olona hlobo ngexesha lethu resistors umbala-coded. Kulula kakhulu, kwaye ufunde ihlelo, ephethe ikhadibhodi idikhowuda into elula lolokwexeshana. Esi sixhobo ifumaneka ngokubanzi, kukho na unomathotholo, kwaye kungabizi kakhulu, ngoko khumbula ukuba ixabiso umbala ayikho imfuneko. Ukuphawula resistors kukuba uxhathiso isicelo amakhonkco ipeyinti imibala eyahlukileyo, nganye ibonisa inombolo, yakha okanye nokuchaneka.

Imicwe ezikhoyo ukususela emithathu ukuya kwemihlanu. Funda ukuba ngowokuqala, kufutshane kwenye izigqibo. Umzekelo, iziqwengana ezine. Okokuqala - omdaka, enye - amnyama, eyesithathu - loo nto ibomvu, owesine - hina. Kuyimfuneko ukuba ukudayala idikhowuda ezi imibala, ayikho lesithathu (apho kufuneka ukhethe indawo "hayi"). Gqibezela kulo an ukuchaneka 1 kW 0, 05%. Ukuba ngezigaba ezintathu, ukuchaneka yi-20%.

Maxa wambi kukho imfuneko ukujongana ngeteknoloji Soviet omdala, nasasebenzayo nangoku zisasebenza. Xa kokuba wamthethisa, wayebonakala sine- emabi, kodwa ixesha banyamezela emangalisayo kwabanye zesampulu esi sixhobo, kwaye ngoku kude ngamanye amaxesha ubizwa ngokuba "kweediliya." Ukuphawula resistors Soviet-eyenziwe lula kwesa umbala, nanzo zibhaliwe nje ihlelo, umzekelo, 4K7 kuthetha 4700 ohms. Kuko konke. Ngokulula nangokucacileyo. Enye ethile - mbhalo isenokuba ezantsi, iSoviet RADIOZAVOD ayifane isetyenziswe "kuma-up 'ibandla yenkcaso, isuke isithandwa yi-Japanese ukugcina isithuba kwibhodi.

Le miniaturization labavelisi izixhobo elektroniki wayibeka phambi imfuneko zizakhele iindlela ezintsha yofakelo. resistors ngelotha Classical ngokusebenzisa imingxuma ebhodini kwi "emi" okanye "wayelele phantsi" indawo kuthatha isithuba kakhulu, yaye le yindlela entsha Wahlanganisa a microplate - smd. Kulo ungayiqondiyo IsiNgesi - songwanga amagama amathathu: «umphezulu» - umphezulu, «entabeni» - ufakelo «iteknoloji» - kucacile ukuba lithetha. namalungu amancinane ukuba soldered ngqo umphezulu umkhondo, ngaphandle zinemingxuma, kunye nemilenze. Kwathatha resistors ezintsha zokuphawula, kunye namanye amacandelo, njenge ilight kunye capacitors ngokunjalo.

Ukuphawula resistors smd thile embhoxo indlela elungileyo endala Soviet. Kwakhona eshicilelweyo amanani kunye neeleta. Umahluko lisekhona. Le leta akusoloko ayifumaneki, ukuba kuyimfuneko, «R» isetyenziswa njengendawo ungumqobo.

Umzekelo, 2183 kuthetha ukuba 218 kufuneka iphindaphindwe 1000, ujika 218 ohms. Resistance, angakwaziyo ukuya kwi-10% ziphawulwe elinemivo emine, ngelakamva kubhekisa kwiindlela apho ukwakha ezilishumi kwaye liphindaphindwe isiphumo inombolo enamanani ezintathu-akhiwa amanani ezimbini zokuqala.

resistors smd kancinci nzima neklasi umgangatho ophezulu, kunye nokunyamezela we-1%. Apha iqondo kwamashumi iiseti ncwadi, umzekelo, D - 10 cubed. Ukuba resistor sibhalwe 10D, oko ohms-10.

Phezu kokuba bethe bayifezekisa iitafile, yamagcisa kuya kufuneka iglasi, njengoko ezincinane kakhulu abalinganiswa!