Lub ntsiab tseem ceeb ntawm LED kuj yog PN kev sib tshuam, tab sis tom qab lub LED tau qhib, nws qhov hluav taws xob poob feem ntau yog 2V, thiab qee qhov LED tuaj yeem ncav cuag 3V. Qhov voltage poob ntawm cov diodes zoo tib yam yog hais txog 0.5V, xws li Schottky diodes.
Lub teeb emitting diodes feem ntau yog siv los ua cov ntsuas. Piv txwv li, qhov taw qhia lub zog thiab qhov taw qhia kev sib txuas lus, piv txwv li, thaum lub chaw nres nkoj serial xa thiab tau txais cov ntaub ntawv, LED flashes qhia tias cov ntaub ntawv raug xa thiab tau txais.
Hauv kev tsim hluav taws xob, ib qho kev txwv tam sim no yuav tsum tau txuas nrog hauv series. Yuav ua li cas txiav txim siab tus nqi ntawm qhov kev txwv tam sim no? Ua ntej, peb yuav tsum paub qhov voltage thiab tam sim no ntawm LED. Qhov hluav taws xob rau pem hauv ntej ntawm ib qho LED yog 2.5V, thiab lub zog tam sim no yog 5mA. Qhov tam sim no rau pem hauv ntej muaj tus nqi ntau. Yog tias qhov tam sim no loj dhau, lub diode yuav raug hlawv. Yog tias qhov tam sim no me dhau, qhov ci ntawm LED tsis txaus.
Cov kev ntsuas no tuaj yeem pom nyob rau hauv Phau Ntawv Qhia LED.
Nco ntsoov tias DC voltage yog 5V. Tshem tawm lub diode voltage poob ntawm 2.5V ntawm 5V. Qhov seem 2.5V muab faib los ntawm qhov tam sim no ntawm 5mA. Qhov tsis kam yog sib npaug li 500 ohms.
Yog li ntawd, 500 ohm kuj yuav tsum tau nyob rau hauv series nyob rau hauv lub Circuit Court.
