Ngatione kuti isu overenga resistors kuti akatungamirira

Kukarukureta kuti resistors nokuda LEDs - iri rinokosha chaizvo kushanda kuti yaifanira usati kubatanidza kwakaita kuti simba kunobva. Izvi achasarudza chokupika zvose diode uye redunhu rose. The resistor inofanira kushandiswa mudunhu ngaatevedzane imwe akatungamirira. chaikosha ichi chakagadzirirwa kutirambidza magetsi ruchiyerera napakati diode. Kana resistor ane aizviti nemishonga yakaderera pane zvaida, ipapo akatungamirira achakundikana (kutsva), uye kana kukosha parameter ichi chichava kupfuura zvakafanira, chiedza kubva semiconductor chinhu uchakomborerwawo haachaoni.

Kukarukureta resistors nokuti LEDs kunofanira kuitwa kubudikidza mutoo R = (US - Ul) / I, apo:

• US - zvitengeswa voltage;
• Ul - voltage diode simba (yemanyorero 2 volts uye 4);
• I - kuitika pamusoro diode.

Iva nechokwadi kuti nechokwadi chokuti vakasarudzwa kukosha Magetsi idukusa kufadza kuitika kukosha semiconductor maatomu akafanana. Asati achipfuura kuti kuverenga, unofanira kuisa kukosha iyi amps. Kazhinji zviri pasipoti Data raanotaura milliamps. Saka, sezvo pamusana Masvomhu achatorwa kukosha yacho aizviti kurwisa yacho resistor mu ohms. Kana zvichiita kukosha haangagari zvakafanana ane mwero resistor, unofanira kusarudza dzepedyo hombe sangano. Kana zvichibvira kubatanidza iri dzinotevedzana dzakawanda maduku chezita nemishonga zvinhu kuitira kuti nhamba vakaenzana kubaya nemishonga.

Somuenzaniso, izvi ndizvo zvatinoziva overenga resistors kuti LEDs. Ngationei kufunga kuti tine simba wedzerai ane goho voltage 12 volts, uye akatungamirira (Ul = 4 V). The inodiwa Kuyerera 20 Ma. We kurishandura kuwana 0.02 amps uye A. Tinogona ikozvino mberi kuti kuverenga pamusoro R = (12 - 4) / 0.02 = 400 ohms.

Zvino funga kuti kuverenga yaifanira pane dzakatevedzana kubatana ane muzvizhinji kuti semiconductor zvinhu. Izvi ndezvechokwadi kunyanya kana kushanda akatungamirira rinoparadza. Akatevedzana kubatana kunoderedza simba zvinodyiwa uye zvinoita kuti panguva batanidza vakawanda zvinhu. Zvisinei, cherechedza kuti ose akatevedzana-chokuita LEDs kunge zvakafanana mhando, uye simba zvisingasviki - zvakakwana simba. Ndiyo nzira inofanira overenga resistors kuti LEDs mu dzakatevedzana chokuita. Kufunga kuti tine ngetani 3 zvinhu (neimwe voltage ndiro 4 volts) uye 15-volt simba zvitengeswa. We kuona voltage Ul. To ichi inofanira kuwedzerwa nechimwe diodes manhamba 4 + 4 + 4 = 12 volts. Pasipoti akatungamirira kukosha kwazvino 0.02 A, isu exchange R = (15-12) / 0,02 = 150 ohms.

Zvakakosha kuyeuka kuti yakafanana kubatana kwakaita LEDs, kuti akariisa zvinyoronyoro, pfungwa yakaipa. The ndechokuti zvinhu izvi vane kusiyana parameters, rimwe nerimwe zvinoda voltages siyana. Izvi zvinotungamirira ndechokuti kuverenga pamusoro LEDs - chinhu maturo maekisesaizi. With ikoku, nechimwe chine maatomu akafanana vachapenya nechiedza chawo. Mamiriro acho ezvinhu anogona kuponeswa chete vakaomerwa resistor neimwe diode yoga.

In mhedziso, tinoisa kuti maererano nenheyo ichi vari dzaona zvose zvakaita gungano kusanganisira mwenje pamwe LEDs. Kana uchida pakuzvinyengera kuungana chivakwa yakadaro, Data Masvomhu nokuti muchava akakodzera.