Jacobs Posted February 22, 2013 Share Posted February 22, 2013 Salut , am vrut sa probez un led sa vad daca mai functioneaza si l-am conectat cateva secunde la o baterie de 9 V. A luminat putin dupa care nu a mai functionat , am mai incercat inca un led si aceeasi poveste , intrebarea mea e : S-a ars nu? trebuia sa pun si o rezistenta ca sa nu-l ard :| Link to comment
leoncris Posted February 22, 2013 Share Posted February 22, 2013 Cum sa bagi intr'un LED de 3V , 9V ?Evident ca l'ai ars.Poti alimenta la 9V printr'o rezistenta de 470 ohmi.R = U - Ul / Il Link to comment
miron1947 Posted February 22, 2013 Share Posted February 22, 2013 S-a ars nu? trebuia sa pun si o rezistenta ca sa nu-l ardDa, vedeti aici http://www.hebeiltd.com.cn/?p=zz.led.resistor.calculator cum se dimensioneaza aceasta. Link to comment
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