ʻO ke kukui-emitting diode, a i ʻole LED no ka pōkole, he mea semiconductor e hoʻololi i ka ikehu uila i ikehu māmā.Ke hele kekahi au i mua ma ka paipu, hiki ke hoʻokuʻu ʻia ka ikehu ma ke ʻano o ka mālamalama.Ua like like ka nui o ka malamalama me ke au i mua.ʻO ke kala ʻālohilohi e pili ana i ka mea o ka paipu.
ʻO ka mea mua, nā hiʻohiʻona nui o LED
(1) He haʻahaʻa ka uila hana, a pono kekahi i ka 1.5-1.7V wale nō e hoʻohuli i ke kukui;(2) He liʻiliʻi ka hana o kēia manawa, ʻo ka waiwai maʻamau ma kahi o 10mA;(3) Loaʻa iā ia nā hiʻohiʻona unidirectional conductive e like me nā diodes maʻamau, akā ʻoi aku ka nui o ka ʻāpana make.(4) Loaʻa iā ia nā hiʻohiʻona hoʻopaʻa uila e like me nā diodes zener silika;(5) He wikiwiki ka manawa pane, ʻo 1-10ms wale nō ka manawa mai ka noi uila uila, a hiki i ka 100Hz ke alapine pane;a laila ua lōʻihi ke ola lawelawe, maʻamau a hiki i 100,000 mau hola a ʻoi aku paha.
I kēia manawa, ʻo nā diodes māmā ʻulaʻula a me ka ʻōmaʻomaʻo phosphorescent phosphor (GaP) LED, nona ka hāʻule uila mua o VF = 2.3V;ʻulaʻula phosphorescent arsenic phosphor (GaASP) LED, nona ka hāʻule o ka uila i mua ʻo VF = 1.5-1.7V;a no nā LED melemele a polū me ka hoʻohana ʻana i ka silikon carbide a me nā mea sapphire, e hāʻule ka uila i mua VF = 6V.
Ma muli o ka pihi volt-ampere i mua o ka LED, pono e hoʻopili ʻia kahi pale pale palena i kēia manawa i ka moʻo e pale i ka puhi ʻana i ka paipu.I loko o kahi kaapuni DC, hiki ke koho ʻia ke kūpaʻa palena o kēia manawa me ka hoʻohana ʻana i kēia ʻano:
R = (E-VF) / IF
Ma nā kaʻapuni AC, hiki ke koho ʻia ke kūʻokoʻa palena o kēia manawa R ma ke ʻano penei: R = (e-VF) / 2IF, kahi e ʻo ia ka waiwai kūpono o ka mana o ka mana AC.
ʻO ka lua, ʻo ka hoʻāʻo o nā diodes māmā
Inā ʻaʻohe mea hana kūikawā, hiki ke koho ʻia ke LED e kahi multimeter (eia ka MF30 multimeter i lawe ʻia ma ke ʻano he laʻana).ʻO ka mea mua, e hoʻonoho i ka multimeter i Rx1k a i ʻole Rx100, a ana i ke kūpaʻa i mua a i hope o ke LED.Inā emi ka pale i mua ma mua o 50kΩ, ʻaʻole palena ʻole ka pale ʻana, e hōʻike ana he maʻamau ka paipu.Inā ʻaʻole a pau ʻole ka ʻaoʻao mua a me ka ʻaoʻao hope, a i ʻole nā kumu kūʻē i mua a me ka hoʻohuli ʻana i kahi kokoke, ʻo ia ka hewa o ka paipu.
A laila, pono e ana i ka hoʻokuʻu kukui o ka LED.No ka mea, aia ma luna o 1.5V kona hāʻule uila mua, ʻaʻole hiki ke ana pololei ʻia me Rx1, Rx1O, Rx1k.ʻOiai ke hoʻohana nei ʻo Rx1Ok i kahi pākaukau 15V, ʻoi aku ka kiʻekiʻe o ke kūpaʻa kūloko, a ʻaʻole hiki ke hoʻāla ʻia ka paipu e hoʻomālamalama.Eia naʻe, hiki ke hoʻohana ʻia ke ʻano mika pālua no ka hoʻāʻo ʻana.Hoʻohui ʻia ʻelua multimeters i ka moʻo a hoʻonoho ʻia ʻelua i ke kūlana Rx1.Ma kēia ala, ʻo 3V ka nui o ka uila uila a ʻo 50Ω ka nui o ke kūpaʻa kūloko.ʻOi aku ka nui o ka manawa hana i hāʻawi ʻia i ka L-print ma mua o 10mA, ʻo ia ka lawa e hoʻohuli ai ka paipu a hoʻokuʻu i ka mālamalama.Inā ʻaʻole ʻā aʻe ka paipu i ka wā o ka hoʻāʻo ʻana, e hōʻike ana ia he hemahema ka paipu.
No ka VF = 6V LED, hiki iā ʻoe ke hoʻohana i kahi pā 6V ʻē aʻe a me ka pale pale palena o kēia manawa no ka hoʻāʻo.
Ka manawa hoʻouna: Mar-19-2020
