Makhe sibone indlela ukubala resistors for LED

Ukubalwa resistors ze-LED - oku ngumsebenzi ebaluleke kakhulu ekufuneka yenziwe phambi kokuba ukuqhagamshela LED umthombo wamandla. Oku kuya kuqinisekisa ukusebenza zombini diode kwaye yonke wesekethe. Le resistor kufuneka zibandakanywe kwisiphaluka kuthotho kunye LED. Le element yenzelwe ukunciphisa lwangoku ayahamba na diode. Ukuba resistor siyakwazi ukumelana ngegama ngaphantsi kufuneka, ngoko ke LED ziya kucinywa (ecima), kwaye ukuba ixabiso le parameter iya kuba ngaphezu kuyimfuneko, ukukhanya element semiconductor liya kuba norhatyazo kakhulu.

resistors Calculation ngokuba LED kufuneka lwenziwe yi-R ilandelayo ifomula = (US - ul) / mna, apho:

• US - supply ombane;
• Ul - ombane diode amandla (njenge volts 2 kunye 4);
• I - yangoku diode.

Qiniseka ukuba ukuqinisekisa ukuba ixabiso ekhethiweyo yangoku yombane mncinci kuno kwexabiso eliphezulu yangoku element semiconductor. Ngaphambi kokuqhubeka ekubaleni, kufuneka usete eli xabiso ku amps. Ngokuqhelekileyo oku data yokundwendwela esichazwe milliamps. Ngenxa yoko, ngenxa izibalo ifunyenwe ixabiso yenkcaso olutyunjwe resistor in ohms. Ukuba ixabiso ngenxa akayi kuba efanayo kunye resistor eqhelekileyo, kufuneka ukhethe ihlelo elikhulu ekufuphi. Okanye kuyenzeka ukudibanisa kwi kuthotho elements nokumelana wesiqhelo ezincinci eziliqela ukuze iyonke ilingana ukuxhathisa target.

Umzekelo, oku indlela ukubala resistors for LED. Makhe sicinge ukuba sibe unikezelo amandla ombane yemveliso volts-12, kunye LED (ul = 4 V). I ekhoyo yi-20 Ma. Siguqula ngayo ukufumana 0,02 amps kunye I. ngoku ukuqhubeka nendlela ekubalwa ngayo R = (12 - 4) / 0,02 = 400 ohms.

Ngoku cinga yokubala kufuneka kwenziwe njani endaweni uqhagamshelwano uthotho ezininzi kuThixo lweziqalelo semiconductor. Oku kuyinyaniso ngakumbi xa usebenza imicu LED. Uxhulumaniso series kunciphisa ukusetyenziswa kwamandla kwaye yenza ukuba ngaxeshanye ukudibanisa inani elikhulu lweziqalelo. Qaphela, noba kunjani, ukuba zonke ii-LED series-elidityaniswe kufuneka zibe ngohlobo olufanayo, kwaye umbane - enamandla ngokwaneleyo. Nantso indlela kufuneka ukubala resistors for LED ngokunxulumene series. Zicingele ukuba nomxokelelwane lweziqalelo-3 (ombane ngalinye volts-4) kunye unikezelo lwamandla 15-volt. Siza kuqinisekisa ombane ul. Ukuze oku kufuneka zongezwe nganye ilight manani aphezulu 4 + 4 + 4 = volts-12. Passport LED ixabiso langoku 0,02 A, siya ukubala R = (15-12) / 0,02 = 150 ohms.

Kubalulekile ukukhumbula ukuba udibaniso engumzekelo LED, makayixhome ngokuzolileyo, luluvo embi. Eyona nto kukuba ezi zinto kuba ongenabuyambo yemida, nganye efuna yombane ezahlukeneyo. Oku kukhokelela ekubeni ukubala LED - kuyinto kulilize. Ngesi uxhulumaniso, isiqalelo ngasinye baya kukhazimla nobumhlophe yayo. Le meko ukusindiswa kuphela resistor ngokunciphisa diode ngasinye ngokwahlukeneyo.

Xa ndiqukumbela, sidibanisa ukuba ngokwale mgaqo kubalwa lonke ibandla LED kuquka izibane kunye LED. Ukuba ufuna self-bahlanganise isakhiwo enjalo, izibalo data ngokuba niya kuba ezifanelekileyo.