Tiyeni tione mmene kuwerengera resistors kwa LED

Mawerengedwe a resistors kwa LEDs - ichi ndi ntchito yofunika kwambiri imene iyenera kuchitidwa musanayambe kugwirizana LED kuti gwero mphamvu. Izi kudziwa ntchito kwa diode ndi dera lonse. resistor ayenera m'gulu la dera mndandanda ndi anatsogolera. mchitidwe lakonzedwa kuti achepetse panopa likuyenderera mu diode lapansi. Ngati resistor ali mwadzina kukana poyerekeza chofunika, ndiye ankatsogolera adzalephera (kunyeka), ndipo ngati mtengo wa chizindikiro ichi adzakhala kuposa zofunika, kuwala ndi mchitidwe michenga yopangira zida zamagetsi adzakhala kwambiri mdima.

Yowerengera resistors kwa LEDs ayenera kupangidwa ndi zotsatirazi chilinganizo R = (US - up) / Ine, komwe:

• US - kotunga voteji;
• Up - voteji diode mphamvu (amangoona 2 volts and 4);
• Ine - panopa diode lapansi.

Onetsetsani kuonetsetsa kuti anasankha mtengo wa magetsi n'chochepa kuposa pazipita mtengo panopa zinthu michenga yopangira zida zamagetsi. Akuyendera kuti mawerengedwe, inu muyenera mtengo izi mikuza mawu. Kawirikawiri mu deta pasipoti zafotokozeredwa milliamps. Choncho, chifukwa cha anapezazo ndi analandira mtengo wa kukana mwadzina wa resistor mu ohms. Ngati phindu chifukwa sadzakhala chimodzimodzi ndi resistor muyezo, muyenera kusankha wapafupi chipembedzo zikuluzikulu. Kapena n'zotheka kulumikiza mu mndandanda angapo ang'onoang'ono mwadzina kukana zinthu kotero kuti onse wofanana chandamale kukana.

Mwachitsanzo, umu ndi mmene ife kuwerengetsa resistors kwa LEDs. Tiyeni tinene kuti tili ndi magetsi ndi linanena bungwe voteji wa volts 12, ndi kutsogozedwa (up = 4 V). Chofunika panopa ndi 20 MA. Timamasulira kuti alandire 0.02 mikuza mawu ndi A. zikutizindikiritsa chitani ndi mawerengedwe a R = (12 - 4) / 0.02 = 400 ohms.

Tsopano tiyeni tione mmene mawerengedwe ayenera ikuchitika pa mndandanda kugwirizana ndi kuchuluka kwa zinthu michenga yopangira zida zamagetsi. Zimenezi ndi zoona makamaka pamene akugwira n'kupanga LED. Kugwirizana mndandanda amachepetsa mowa mphamvu ndi kulola kuti imodzi kulumikiza ambiri zinthu. Komabe, onani kuti onse mndandanda-olumikizidwa LEDs ziyenera yofanana, ndipo magetsi - mokwanira amphamvu. Ndiyo njira aziwerenga resistors kwa LEDs mu mndandanda kugwirizana. Kuganiza kuti tili ndi unyolo wa zinthu 3 (chilichonse voteji ndi 4 volts) ndi 15 Volt magetsi. Ife kudziwa voteji up. Kuti izi ziyenera kuwonjezeredwa aliyense diodes ziwerengero 4 + 4 + 4 = 12 volts. Pasipoti LED mtengo panopa 0,02 A, ife kuwerengetsa R = (15-12) / 0,02 = 150 ohms.

Nkofunika kukumbukira kuti kugwirizana yomweyi LEDs, kuziyika izo modekha, lingaliro zoipa. Chinthu ndi zinthu izi ndi kusuntha magawo, omwe amafuna voltages osiyana. Zimenezi zimabweretsa chakuti mawerengedwe a LEDs - ndi zolimbitsa kanthu. Ndi kugwirizana, aliyense mchitidwe adzawala ndi kuwala kwake. zinthu angathe kupulumutsidwa pokhapokha ndi resistor Kuchepetsa aliyense diode payokha.

Pomaliza, kuwonjezera kuti malinga ndi mfundo imeneyi mopitirira khamu lonse LED kuphatikizapo nyali ndi LEDs. Ngati mukufuna kudzimvera kusonkhanitsa dongosolo chotero, kuwerengetsera deta chifukwa mudzakhala zogwirizana.