Ake sibone indlela esingabambisana ukubala resistors ngoba LED

Ukubalwa resistors ngoba LED - lena operation kubaluleke kakhulu ukuthi kumele kwenziwe ngaphambi ukuxhuma LED emthombeni wamandla. Lokhu kuzokwenza ukucacisa ukusebenza kokubili diode futhi wonke wesifunda. I Resistor kumele kufakwe wesifunda ngo uchungechunge nge LED. Lo msuka yakhelwe kukhawulwe zamanje egeleza ngokusebenzisa diode. Uma Resistor has a ukumelana okuzisholo ngaphansana edingekayo ke LED izohluleka (zishe), futhi uma inani lale ipharamitha kuyoba ephakeme kunaleyo edingekayo, ukukhanya isici Semiconductor kuyoba dim kakhulu.

Ukubalwa resistors ngokuba LED kufanele kwenziwe ifomula R elandelayo = (US - UL) / mina, lapho:

• US - supply voltage;
• UL - voltage amandla diode (ngokuvamisile 2 volts futhi 4);
• Mina - samanje diode.

Qiniseka ukuqinisekisa ukuthi ukubaluleka ekhethiwe kagesi lincane esiphezulu Inani lamanje le-elementi Semiconductor. Ngaphambi kokuqhubeka ukubala, kumele usetha le Inani Amps. Ngokuvamile kuba idatha ipasipoti elicacisiwe milliamps. Ngakho, ngenxa izibalo sitholwa value of ukumelana okuzisholo we Resistor e ohms. Uma ukubaluleka okuholela ngeke okufanayo nge Resistor ejwayelekile, kufanele ukhethe ihlelo abaseduze ezinkudlwana. Noma kungenzeka ukuxhuma ku uchungechunge ezincane okuzisholo izakhi eziningana ukumelana ukuze Imininingwane lilingana ukumelana target.

Isibonelo, lokhu yindlela esibala resistors ngoba LED. Ake ucabange ukuthi sinawo amandla supply nge voltage okukhiphayo of 12 volts, futhi LED (UL = 4 V). Lamanje obudingekayo 20 ma. Thina kwisi ukuthola 0.02 Amps futhi A. Manje singakwazi ukuqhubekela ekubalweni R = (12 - 4) / 0.02 = 400 ohms.

Manje cabanga ngalokho okushiwo ukubala kumele kwenziwe ngesikhathi uchungechunge uxhumano a sebuningini izakhi Semiconductor. Lokhu kuyiqiniso ikakhulu lapho esebenza emapheshana LED. Uxhumano uchungechunge kunciphisa ukusetshenziswa amandla futhi kwenza ukuba kanyekanye ukuxhuma inqwaba izakhi. Nokho, phawula ukuthi zonke LED uchungechunge axhunywe kumele kube yohlobo olufanayo, futhi ugesi - ngokwanele enamandla. Yileyondlela kufanele abale resistors ngoba LED e uchungechunge uxhumano. Bamane bacabange ukuthi ube nomgexo izakhi 3 (voltage ngamunye 4 volts) kanye 15 engama-volt angu ugesi. Sinquma voltage UL. Ukuze lokhu kumele kwengezwe kwi ngayinye diodes izibalo 4 + 4 + 4 = 12 volts. Iphasiphothi yase-LED Inani lamanje 0.02 A, esibala R = (15-12) / 0,02 = 150 ohms.

Kubalulekile ukukhumbula ukuthi uxhumano okucishe kufane nalokhu LED, ukubeka kahle, umbono ongalungile. Into wukuthi lezi zinto kufanele ukushintshashintsha nemingcele, ngamunye edinga voltages ezahlukene. Lokhu kuholela yokuthi ekubalweni LED - kuyinto umsebenzi iyize. Nale uxhumano, element ngayinye kuyoba agcwale ukukhanya yayo. Isimo kungaba basindiswe kuphela Resistor nokukhawulela ngoba diode ngalinye ngokuhlukile.

Ekuphetheni, siye sinezele ukuthi ngokuvumelana nalesi simiso kubalwa yonke inhlangano LED kuhlanganise izibani ne LED. Uma ufuna self-abuthe sezakhiwo ezinjalo, idatha izibalo ngawe kuyoba efanele.