Umda weI-LEDukwanda ngenxa yezizathu ezahlukeneyo zokusetyenziswa. Ngeli xesha, amanyathelo okukhusela kufuneka athathwe ukuze kuqinisekiswe ukuba i-LED ayiyi konakaliswa ngenxa yokuba ukunyuka kwangoku kudlula ixesha elithile kunye ne-amplitude. Ukusebenzisa izixhobo zokukhusela iisekethe yeyona ndlela isisiseko kunye neyoqoqosho. Eyona nto isetyenziswa ngokuqhelekileyo ukukhuselaIsibane se-LEDukukhuselwa kwesekethe yi-varistor.

I-Varistor isetyenziselwa ukukhusela izibane ze-LED. Kunokuthiwa kungakhathaliseki ukuba yintoni ukunikezelwa kwamandla, ukunikezelwa kwamandla okutshintsha kunye nombane wombane osetyenziselwa izibane ze-LED, ukhuseleko olunjalo luyafuneka. Isetyenziselwa ukukhusela amandla ombane avela rhoqo kuthungelwano lwamandla kamasipala. Oko kubizwa ngokuba yi-voltage ye-surge ikakhulu yi-pulse yexesha elifutshane ephezulu ye-voltage ebangelwa ukubetha kombane okanye ukuqala kunye nokumisa izixhobo zombane eziphezulu. Ukubetha kombane sesona sizathu. Ukubetha kombane kunokohlulwa kube sisibetho sombane esithe ngqo kunye nombane ongathanga ngqo. Uqhankqalazo oluthe ngqo lombane luthetha ukuba umbane ubetha umbane wombane ngokuthe ngqo, nto leyo enqabileyo, kwaye uninzi lweenkqubo zonikezelo lwamandla ombane zinemilinganiselo yokhuseleko lombane ngokwazo. Ukubetha kombane okungathanga ngqo kubhekiselele kumbane osasazwa kwigridi yamandla ebangelwa ngumbane. Olu lwando lunokwenzeka kakhulu, kuba iindudumo ezingama-1800 kunye nemibane engama-600 zenzeka kwihlabathi lonke umzuzu ngamnye. Ukubetha kombane ngakunye kuya kubangela ukunyuka kwamandla ombane kwigridi yamandla ekufutshane. Ububanzi be-pulse ye-surge ngokuqhelekileyo buncinci okanye bufutshane, kwaye i-amplitude ye-pulse ingaba phezulu ukuya kumawaka amaninzi e-volts. Ikakhulu ngenxa ye-amplitude yayo ephezulu, inempembelelo enkulu kumonakalo wezixhobo zombane. Ngaphandle kokhuseleko, zonke iintlobo zezixhobo zombane kulula ukuba zonakaliswe. Ngethamsanqa, ukhuseleko lokutya lulula kakhulu. Yongeza nje i-varistor ye-anti surge, edla ngokudityaniswa ngokuhambelanayo ngaphambi kokulungiswa.

Umgaqo wale varistor umi ngolu hlobo lulandelayo: kukho i-resistor nonlinear ogama lokumelana nalo lusondele kwisekethe evulekileyo ngaphakathi kwinqanaba elichaziweyo, kwaye emva kokuba i-voltage esetyenzisiweyo idlula umqobo, ukuchasana kwayo kusondele kwi-zero ngokukhawuleza. Oku kwenza kube lula ukufunxa utyando. Ngaphezu koko, i-varistor sisixhobo esinokubuyiswa. Emva kokufunxa utyando, inokudlala indima yokukhusela.