{"id":4076,"date":"2025-07-05T15:48:09","date_gmt":"2025-07-05T07:48:09","guid":{"rendered":"https:\/\/led.amasly.com\/?page_id=4076"},"modified":"2025-07-05T15:48:14","modified_gmt":"2025-07-05T07:48:14","slug":"den-led-khong-sang-nguyen-nhan-pho-bien-va-cach-khac-phuc","status":"publish","type":"page","link":"https:\/\/led.amasly.com\/vi\/kien-thuc\/kien-thuc-ve-den-led\/den-led-khong-sang-nguyen-nhan-pho-bien-va-cach-khac-phuc\/","title":{"rendered":"\u0110\u00e8n LED kh\u00f4ng s\u00e1ng? Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c"},"content":{"rendered":"
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\u0110\u00e8n LED kh\u00f4ng s\u00e1ng? Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/strong><\/strong><\/h1>\n\n\n\n
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Khi \u0111\u00e8n LED \u0111\u1ed9t ng\u1ed9t ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, ph\u1ea3n \u1ee9ng \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ea1n c\u00f3 ph\u1ea3i l\u00e0 mua m\u1ed9t c\u00e1i m\u1edbi kh\u00f4ng? Tuy nhi\u00ean, \u0111\u00f4i khi v\u1ea5n \u0111\u1ec1 kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf ch\u00ednh \u0111\u00e8n LED. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch c\u00e1c nguy\u00ean nh\u00e2n v\u00e0 gi\u1ea3i ph\u00e1p cho s\u1ef1 c\u1ed1 \u0111\u00e8n LED. Sau khi \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng m\u1eb9o th\u1ef1c t\u1ebf \u0111\u1ec3 t\u1ef1 m\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u00e8n LED kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng!<\/p>\n\n\n\n

\u0110\u00e8n LED c\u00f3 ngu\u1ed3n \u0111i\u1ec7n nh\u01b0ng kh\u00f4ng s\u00e1ng; m\u1ed9t s\u1ed1 \u0111\u00e8n LED s\u00e1ng trong khi ph\u1ea7n c\u00f2n l\u1ea1i kh\u00f4ng s\u00e1ng; v\u1ea5n \u0111\u1ec1 nh\u1ea5p nh\u00e1y g\u00e2y ra hi\u1ec7u \u1ee9ng \u00e1nh s\u00e1ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh; \u0111\u00e8n LED v\u1eabn ph\u00e1t ra \u00e1nh s\u00e1ng y\u1ebfu ngay c\u1ea3 sau khi \u0111\u00e3 t\u1eaft; v\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u00e8n LED; \u0111\u00e8n LED c\u00f3 ngu\u1ed3n \u0111i\u1ec7n nh\u01b0ng kh\u00f4ng s\u00e1ng.<\/strong><\/p>\n\n\n\n

\u0110\u1ea3o ng\u01b0\u1ee3c c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m c\u1ee7a \u0111\u00e8n LED: <\/strong>N\u00f3i chung, \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111o sau khi \u0111\u1ea3o chi\u1ec1u l\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng t\u1ea3i. N\u1ebfu \u0111\u00fang nh\u01b0 v\u1eady, ch\u1ec9 c\u1ea7n k\u1ebft n\u1ed1i l\u1ea1i c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m c\u1ee7a \u0111\u00e8n LED.<\/p>\n\n\n\n

D\u00e2y d\u1eabn \u0111\u1ea7u ra kh\u00f4ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn: <\/strong>\u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ea1ch h\u1edf trong LED v\u00e0 \u0111i\u1ec7n \u00e1p \u0111o \u0111\u01b0\u1ee3c s\u1ebd hi\u1ec3n th\u1ecb \u0111i\u1ec7n \u00e1p kh\u00f4ng t\u1ea3i. B\u1ea1n c\u1ea7n k\u1ebft n\u1ed1i l\u1ea1i c\u00e1c \u0111\u1ea7u ra.<\/p>\n\n\n\n

S\u1ef1 kh\u00f4ng kh\u1edbp gi\u1eefa t\u1ea3i th\u1ef1c t\u1ebf v\u00e0 c\u00f4ng su\u1ea5t \u0111\u1ea7u ra: <\/strong>N\u1ebfu c\u00f4ng su\u1ea5t th\u1ef1c t\u1ebf cao h\u01a1n ho\u1eb7c th\u1ea5p h\u01a1n c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c, m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n LED c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng.<\/p>\n\n\n\n

M\u1ea1ch ng\u1eafn ho\u1eb7c m\u1ea1ch h\u1edf: <\/strong>\u0110i\u1ec1u n\u00e0y s\u1ebd khi\u1ebfn c\u00e1c \u0111\u00e8n LED kh\u00f4ng s\u00e1ng. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, b\u1ea1n c\u1ea7n li\u00ean h\u1ec7 v\u1edbi m\u1ed9t chuy\u00ean gia \u0111\u1ec3 s\u1eeda ch\u1eefa m\u1ea1ch \u0111i\u1ec7n.<\/p>\n\n\n\n

\u0110\u00e8n LED b\u1ecb h\u1ecfng: <\/strong>Theo th\u1eddi gian, c\u00e1c \u0111\u00e8n LED c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 linh ki\u1ec7n \u0111i\u1ec7n t\u1eed n\u00e0o kh\u00e1c. N\u1ebfu v\u1ea5n \u0111\u1ec1 kh\u00f4ng n\u1eb1m \u1edf ngu\u1ed3n \u0111i\u1ec7n ho\u1eb7c m\u1ea1ch \u0111i\u1ec7n, h\u00e3y ki\u1ec3m tra xem c\u00f3 \u0111\u00e8n LED b\u1ecb h\u1ecfng hay kh\u00f4ng. M\u1ed9t c\u00e1ch \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y l\u00e0 th\u1ef1c hi\u1ec7n \u201cki\u1ec3m tra so s\u00e1nh\u201d, trong \u0111\u00f3 \u0111\u00e8n LED nghi ng\u1edd b\u1ecb h\u1ecfng \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi m\u1ed9t \u0111\u00e8n LED b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n

V\u1ea5n \u0111\u1ec1 v\u1ec1 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u1ee5 \u0111i\u1ec7n: <\/strong>N\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u1ee5 \u0111i\u1ec7n kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u00e8n LED, \u0111\u00e8n LED s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch. M\u1ed9t kh\u1ea3 n\u0103ng kh\u00e1c l\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u1ee5 \u0111i\u1ec7n b\u1ecb h\u1ecfng. N\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n b\u1ecb h\u1ecfng, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ee7a n\u00f3 th\u01b0\u1eddng kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra y\u00eau c\u1ea7u c\u1ee7a \u0111\u00e8n. N\u1ebfu t\u1ee5 \u0111i\u1ec7n b\u1ecb h\u1ecfng, c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n c\u00e1c v\u1ebft ph\u1ed3ng, r\u00f2 r\u1ec9 \u0111i\u1ec7n gi\u1ea3i ho\u1eb7c v\u1ebft ch\u00e1y tr\u00ean b\u1ec1 m\u1eb7t. Ngo\u00e0i ra, gi\u00e1 tr\u1ecb \u0111i\u1ec7n dung s\u1ebd kh\u00f4ng n\u1eb1m trong ph\u1ea1m vi \u0111\u1ecbnh m\u1ee9c. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, b\u1ea1n n\u00ean thay th\u1ebf b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u1ee5 \u0111i\u1ec7n. Khi thay th\u1ebf b\u1ed9 \u0111i\u1ec1u khi\u1ec3n, h\u00e3y ch\u1ecdn ngu\u1ed3n \u0111i\u1ec7n t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u00e8n LED. Khi thay th\u1ebf t\u1ee5 \u0111i\u1ec7n, h\u00e3y ch\u1ecdn t\u1ee5 \u0111i\u1ec7n c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt t\u01b0\u01a1ng t\u1ef1 nh\u01b0 t\u1ee5 \u0111i\u1ec7n g\u1ed1c ho\u1eb7c c\u00f3 gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng cao h\u01a1n.<\/p>\n\n\n\n

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T\u1ea1i sao ch\u1ec9 c\u00f3 m\u1ed9t n\u1eeda s\u1ed1 \u0111\u00e8n LED c\u1ee7a t\u00f4i s\u00e1ng l\u00ean?<\/strong><\/strong><\/h2>\n\n\n\n

S\u1ef1 c\u1ed1 c\u1ee7a m\u1ed9t \u0111\u00e8n LED trong m\u00f4-\u0111un \u0111\u00e8n LED s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u0111\u00e8n LED kh\u00e1c, nh\u01b0ng s\u1ebd khi\u1ebfn \u00e1nh s\u00e1ng m\u1edd \u0111i. C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y h\u1ecfng \u0111\u00e8n LED bao g\u1ed3m:<\/p>\n\n\n\n

\u0110\u1ed9 \u1ea9m: <\/strong>C\u00e1c h\u1ea1t LED \u1ea9m \u01b0\u1edbt kh\u00f4ng th\u1ec3 ph\u00e1t s\u00e1ng ho\u1eb7c kh\u00f4ng \u0111\u1ee7 s\u00e1ng. \u0110\u00e2y l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 l\u01b0u tr\u1eef ph\u1ed5 bi\u1ebfn \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ea1t \u0111\u00e8n LED. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng h\u01b0\u1edbng d\u1eabn kh\u00e1ch h\u00e0ng nung c\u00e1c h\u1ea1t LED hai l\u1ea7n tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng l\u1ea1i.<\/p>\n\n\n\n

H\u1ea0I: <\/strong>C\u00e1c h\u1ea1t \u0111\u00e8n b\u1ecb ch\u00e1y s\u1ebd c\u00f3 c\u00e1c v\u1ebft \u0111en tr\u00ean b\u1ec1 m\u1eb7t. N\u1ebfu ch\u1ec9 c\u00f3 m\u1ed9t ho\u1eb7c hai h\u1ea1t \u0111\u00e8n b\u1ecb h\u1ecfng, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t mua c\u00f9ng lo\u1ea1i h\u1ea1t \u0111\u00e8n \u0111\u1ec3 thay th\u1ebf. N\u1ebfu c\u00f3 nhi\u1ec1u h\u1ea1t \u0111\u00e8n b\u1ecb h\u1ecfng, to\u00e0n b\u1ed9 b\u1ea3ng \u0111\u00e8n n\u00ean \u0111\u01b0\u1ee3c thay th\u1ebf.<\/p>\n\n\n\n

D\u1ea3i \u0111\u00e8n LED th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u \u0111o\u1ea1n. C\u00e1c h\u1ea1t \u0111\u00e8n trong m\u1ed7i \u0111o\u1ea1n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i theo chu\u1ed7i, trong khi c\u00e1c \u0111o\u1ea1n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i song song. N\u1ebfu m\u1ed9t trong c\u00e1c h\u1ea1t \u0111\u00e8n trong m\u1ed9t \u0111o\u1ea1n b\u1ecb h\u1ecfng, n\u00f3 s\u1ebd khi\u1ebfn \u0111o\u1ea1n \u0111\u00f3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, \u0111o\u1ea1n kh\u00f4ng s\u00e1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa ho\u1eb7c c\u1eaft b\u1ecf.<\/p>\n\n\n\n

T\u1ea1i sao \u0111\u00e8n LED c\u1ee7a t\u00f4i nh\u1ea5p nh\u00e1y?<\/strong><\/strong><\/h2>\n\n\n\n

N\u1ebfu th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a \u0111\u00e8n LED v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng t\u01b0\u01a1ng th\u00edch, \u0111\u00e8n c\u00f3 th\u1ec3 kh\u00f4ng ch\u1ecbu \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n cao, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 nh\u1ea5p nh\u00e1y c\u1ee7a \u0111\u00e8n LED do kh\u00f4ng t\u01b0\u01a1ng th\u00edch? Thay th\u1ebf \u0111\u00e8n b\u1eb1ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n

\u0110\u00e8n LED c\u00f3 th\u1ec3 h\u1ecfng sau m\u1ed9t th\u1eddi gian s\u1eed d\u1ee5ng v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng. Thay th\u1ebf b\u1ed9 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng m\u1ed9t b\u1ed9 m\u1edbi c\u00f3 th\u1ec3 gi\u00fap kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 v\u1edbi \u0111\u00e8n LED.<\/p>\n\n\n\n

N\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 nhi\u1ec7t, n\u00f3 s\u1ebd b\u1ea3o v\u1ec7 m\u1ea1ch khi c\u00e1c \u0111\u00e8n LED kh\u00f4ng t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y c\u1ee7a \u0111\u00e8n. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, b\u1ea1n n\u00ean c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u1ea3n nhi\u1ec7t c\u1ee7a thi\u1ebft b\u1ecb b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh v\u1ecf ngo\u00e0i, th\u00eam c\u00e1c th\u00e0nh ph\u1ea7n l\u00e0m m\u00e1t, v.v.<\/p>\n\n\n\n

\u0110\u00e8n LED c\u00f3 th\u1ec3 nh\u1ea5p nh\u00e1y khi s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt. Theo th\u1eddi gian, m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng cho \u0111\u00e8n v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n. N\u1ebfu b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ea1n ch\u1ed1ng n\u01b0\u1edbc, b\u1ea1n c\u00f3 th\u1ec3 thay th\u1ebf b\u00f3ng \u0111\u00e8n LED.<\/p>\n\n\n\n

S\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch c\u1ee7a b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng: <\/strong>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng th\u00f4ng th\u01b0\u1eddng, n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u00e8n LED, g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, b\u1ea1n n\u00ean ch\u1ecdn m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho \u0111\u00e8n LED, th\u01b0\u1eddng h\u1ed7 tr\u1ee3 c\u00e1c thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng th\u1ea5p, kh\u00f4ng g\u00e2y nhi\u1ec5u cho b\u1ed9 \u0111i\u1ec1u khi\u1ec3n v\u00e0 c\u00f3 d\u1ea3i \u0111i\u1ec1u ch\u1ec9nh r\u1ed9ng.<\/p>\n\n\n\n

Dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p: <\/strong>\u0110\u00e8n LED c\u00f3 th\u1ec3 nh\u1ea5p nh\u00e1y n\u1ebfu g\u1eb7p ph\u1ea3i s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p th\u01b0\u1eddng xuy\u00ean ho\u1eb7c ngu\u1ed3n \u0111i\u1ec7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh. B\u1ea1n c\u00f3 th\u1ec3 l\u1eafp \u0111\u1eb7t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p ho\u1eb7c ch\u1ecdn b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u1eed l\u00fd hi\u1ec7n t\u01b0\u1ee3ng \u00e1nh s\u00e1ng c\u00f2n l\u1ea1i c\u1ee7a \u0111\u00e8n LED?<\/strong><\/strong><\/h2>\n\n\n\n

Hi\u1ec7n t\u01b0\u1ee3ng \u00e1nh s\u00e1ng c\u00f2n l\u1ea1i c\u1ee7a \u0111\u00e8n LED \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c \u0111\u00e8n LED v\u1eabn ph\u00e1t ra \u00e1nh s\u00e1ng y\u1ebfu sau khi \u0111\u00e3 t\u1eaft. Nguy\u00ean nh\u00e2n v\u00e0 gi\u1ea3i ph\u00e1p cho hi\u1ec7n t\u01b0\u1ee3ng \u00e1nh s\u00e1ng c\u00f2n l\u1ea1i c\u1ee7a \u0111\u00e8n LED nh\u01b0 sau:<\/p>\n\n\n\n

M\u1ed9t nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn l\u00e0 c\u00f4ng t\u1eafc \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i sai. C\u00f4ng t\u1eafc n\u00ean \u0111i\u1ec1u khi\u1ec3n d\u00e2y pha (fire wire), kh\u00f4ng ph\u1ea3i d\u00e2y trung t\u00ednh (zero wire). Khi c\u00f4ng t\u1eafc \u0111\u01b0\u1ee3c t\u1eaft, thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi d\u00e2y pha s\u1ebd ph\u00e1t ra \u00e1nh s\u00e1ng y\u1ebfu. Gi\u1ea3i ph\u00e1p l\u00e0 thay \u0111\u1ed5i c\u00e1ch \u0111\u1ea5u n\u1ed1i sao cho c\u00f4ng t\u1eafc \u0111i\u1ec1u khi\u1ec3n d\u00e2y pha.<\/p>\n\n\n\n

M\u1ed9t s\u1ed1 \u0111\u00e8n LED \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng c\u00e1c linh ki\u1ec7n gi\u00e1 r\u1ebb c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1. V\u00ed d\u1ee5, m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m c\u00f3 th\u1ec3 b\u1ecb r\u00f2 r\u1ec9, khi\u1ebfn \u0111\u00e8n nh\u1ea5p nh\u00e1y ho\u1eb7c v\u1eabn s\u00e1ng sau khi t\u1eaft. Ngo\u00e0i ra, c\u00e1c t\u1ea5m n\u1ec1n ph\u1ee7 \u0111\u1ed3ng v\u00e0 hi\u1ec7u \u1ee9ng \u0111i\u1ec7n dung c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 \u00e1nh s\u00e1ng. B\u1ea1n c\u1ea7n mua c\u00e1c thi\u1ebft b\u1ecb m\u1edbi c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o.<\/p>\n\n\n\n

M\u1ed9t s\u1ed1 \u0111\u00e8n LED \u0111\u01b0\u1ee3c trang b\u1ecb c\u00f4ng t\u1eafc \u0111i\u1ec7n t\u1eed c\u00f3 \u0111\u00e8n b\u00e1o. Ngay c\u1ea3 khi c\u00f4ng t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1eaft, nh\u1eefng \u0111\u00e8n n\u00e0y v\u1eabn c\u00f3 th\u1ec3 s\u00e1ng v\u00ec v\u1eabn c\u00f3 m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u00f4ng t\u1eafc. Thay th\u1ebf c\u00f4ng t\u1eafc ho\u1eb7c \u0111\u1eb7t m\u1ed9t \u0111i\u1ec7n tr\u1edf song song v\u1edbi c\u00e1c d\u00e2y d\u1eabn v\u00e0o \u0111\u00e8n l\u00e0 hai gi\u1ea3i ph\u00e1p kh\u1ea3 thi.<\/p>\n\n\n\n

C\u00e1ch x\u1eed l\u00fd v\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t c\u1ee7a \u0111\u00e8n LED?<\/strong><\/strong><\/h2>\n\n\n\n

\u0110\u00e8n LED c\u00f3 th\u1ec3 b\u1ecb qu\u00e1 nhi\u1ec7t do nhi\u1ec1u nguy\u00ean nh\u00e2n, bao g\u1ed3m thi\u1ebft k\u1ebf k\u00e9m, nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 b\u1ea1n c\u00f3 th\u1ec3 xem x\u00e9t \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t c\u1ee7a \u0111\u00e8n LED:<\/p>\n\n\n\n

\u0110\u1ea7u ti\u00ean, t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf t\u1ea3n nhi\u1ec7t. Khi mua \u0111\u00e8n LED, b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 thi\u1ebft k\u1ebf t\u1ea3n nhi\u1ec7t \u01b0u vi\u1ec7t, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1eefng s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng b\u1ed9 t\u1ea3n nhi\u1ec7t b\u1eb1ng h\u1ee3p kim nh\u00f4m v\u00e0 c\u00f3 c\u00e1c l\u1ed7 t\u1ea3n nhi\u1ec7t l\u1edbn. Trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t, h\u00e3y gi\u1eef m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh gi\u1eefa \u0111\u00e8n v\u00e0 t\u01b0\u1eddng ho\u1eb7c c\u00e1c v\u1eadt th\u1ec3 kh\u00e1c \u0111\u1ec3 gi\u00fap t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3. Thi\u1ebft k\u1ebf t\u1ea3n nhi\u1ec7t \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u00e8n LED ngo\u00e0i tr\u1eddi (ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u00e8n \u0111\u01b0\u1eddng LED).<\/p>\n\n\n\n

Ti\u1ebfp theo, \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng. Khi l\u1eafp \u0111\u1eb7t \u0111\u00e8n LED, h\u00e3y tr\u00e1nh \u0111\u1eb7t ch\u00fang \u1edf n\u01a1i c\u00f3 \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp ho\u1eb7c trong kh\u00f4ng gian k\u00edn n\u00f3ng. N\u1ebfu nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao, h\u00e3y s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb l\u00e0m m\u00e1t nh\u01b0 m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed ho\u1eb7c qu\u1ea1t \u0111\u1ec3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n

Ngo\u00e0i ra, vi\u1ec7c v\u1ec7 sinh \u0111\u00e8n \u0111\u1ecbnh k\u1ef3 l\u00e0 m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng nhi\u1ec7t sinh ra. B\u1ee5i b\u1ea9n b\u00e1m tr\u00ean b\u1ec1 m\u1eb7t \u0111\u00e8n l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 t\u1ea3n nhi\u1ec7t, do \u0111\u00f3 vi\u1ec7c v\u1ec7 sinh \u0111\u00e8n l\u00e0 c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1eb7t l\u1ea1i \u0111\u00e8n LED?<\/strong><\/strong><\/h2>\n\n\n\n

B\u1ed9 \u0111i\u1ec1u khi\u1ec3n d\u1ea3i LED th\u01b0\u1eddng c\u00f3 n\u00fat reset tr\u00ean \u0111\u00f3. Sau khi nh\u1ea5n v\u00e0 gi\u1eef n\u00fat reset trong 5-10 gi\u00e2y, c\u00e1c \u0111\u00e8n LED s\u1ebd b\u1eaft \u0111\u1ea7u nh\u1ea5p nh\u00e1y. Sau khi reset, d\u1ea3i LED s\u1ebd tr\u1edf v\u1ec1 m\u00e0u s\u1eafc ban \u0111\u1ea7u. M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p reset kh\u00e1c l\u00e0 ng\u1eaft k\u1ebft n\u1ed1i ngu\u1ed3n \u0111i\u1ec7n v\u00e0 ch\u1edd 10-15 gi\u00e2y tr\u01b0\u1edbc khi k\u1ebft n\u1ed1i l\u1ea1i.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi \u0111\u00e8n LED th\u00f4ng minh, b\u1ea1n c\u00f3 th\u1ec3 reset ch\u00fang th\u00f4ng qua \u1ee9ng d\u1ee5ng t\u01b0\u01a1ng \u1ee9ng. V\u00ec c\u00e1c th\u01b0\u01a1ng hi\u1ec7u \u0111\u00e8n kh\u00e1c nhau c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p reset kh\u00e1c nhau, b\u1ea1n n\u00ean tham kh\u1ea3o h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ebft chi ti\u1ebft.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/strong><\/p>\n\n\n\n

C\u00e2u h\u1ecfi: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u00e8n LED?<\/strong><\/p>\n\n\n\n

A: <\/strong>Khi \u0111\u00e8n LED c\u1ee7a b\u1ea1n kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng, tr\u01b0\u1edbc ti\u00ean h\u00e3y ki\u1ec3m tra k\u1ebft n\u1ed1i ngu\u1ed3n \u0111i\u1ec7n. Ki\u1ec3m tra b\u00f3ng \u0111\u00e8n xem c\u00f3 b\u1ecb bi\u1ebfn m\u00e0u ho\u1eb7c h\u01b0 h\u1ecfng v\u1eadt l\u00fd kh\u00f4ng. \u0110\u1ec3 ti\u1ebfp t\u1ee5c ki\u1ec3m tra s\u1ef1 c\u1ed1, b\u1ea1n c\u00f3 th\u1ec3 th\u1eed b\u00f3ng \u0111\u00e8n b\u1eb1ng c\u00e1ch k\u1ebft n\u1ed1i n\u00f3 v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb kh\u00e1c v\u00e0 sau \u0111\u00f3 mua m\u1ed9t b\u00f3ng \u0111\u00e8n m\u1edbi \u0111\u1ec3 x\u00e1c nh\u1eadn v\u1ea5n \u0111\u1ec1.<\/p>\n\n\n\n

C\u00e2u h\u1ecfi: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft \u0111\u00e8n LED c\u1ee7a t\u00f4i \u0111\u00e3 b\u1ecb h\u1ecfng?<\/strong><\/p>\n\n\n\n

A: <\/strong>Khi b\u00f3ng \u0111\u00e8n LED h\u1ecfng, n\u00f3 s\u1ebd ng\u1eebng ph\u00e1t s\u00e1ng ho\u00e0n to\u00e0n ho\u1eb7c nh\u1ea5p nh\u00e1y ng\u1eaft qu\u00e3ng, v\u00e0 tr\u00ean b\u1ec1 m\u1eb7t s\u1ebd xu\u1ea5t hi\u1ec7n c\u00e1c v\u00f9ng b\u1ecb ch\u00e1y. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u0111\u1ec3 ki\u1ec3m tra xem b\u00f3ng \u0111\u00e8n LED c\u00f3 duy tr\u00ec d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c hay kh\u00f4ng. N\u1ebfu b\u00f3ng \u0111\u00e8n kh\u00f4ng qua \u0111\u01b0\u1ee3c c\u00e1c ki\u1ec3m tra n\u00e0y, th\u00ec r\u1ea5t c\u00f3 th\u1ec3 n\u00f3 \u0111\u00e3 b\u1ecb ch\u00e1y.<\/p>\n\n\n\n

Q: T\u1ea1i sao \u0111\u00e8n LED c\u1ee9 h\u1ecfng li\u00ean t\u1ee5c?<\/strong><\/p>\n\n\n\n

A: <\/strong>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng \u0111\u1ee7 c\u1ee7a \u0111\u00e8n LED c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn qu\u00e1 nhi\u1ec7t h\u1ec7 th\u1ed1ng v\u00e0 l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 l\u00e3o h\u00f3a c\u1ee7a s\u1ea3n ph\u1ea9m. \u0110\u00e8n LED c\u00f3 th\u1ec3 h\u1ecfng do \u0111i\u1ec1u ki\u1ec7n \u0111i\u1ec7n \u00e1p b\u1ea5t th\u01b0\u1eddng, v\u1ea5n \u0111\u1ec1 l\u1eafp \u0111\u1eb7t v\u00e0 l\u1ed7i s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

K\u1ebft lu\u1eadn<\/strong><\/strong><\/h2>\n\n\n\n

Trong b\u00e0i vi\u1ebft tr\u00ean, ch\u00fang ta \u0111\u00e3 th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1c l\u1ed7i th\u01b0\u1eddng g\u1eb7p c\u1ee7a \u0111\u00e8n LED, bao g\u1ed3m \u0111\u00e8n LED kh\u00f4ng s\u00e1ng, nh\u1ea5p nh\u00e1y, hi\u1ec7n t\u01b0\u1ee3ng s\u00e1ng d\u01b0 v\u00e0 v\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t. Ch\u00fang ta c\u0169ng \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t s\u1ed1 m\u1eb9o h\u1eefu \u00edch \u0111\u1ec3 t\u1ef1 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u00e8n LED. Tuy nhi\u00ean, c\u00f3 m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 m\u00e0 b\u1ea1n kh\u00f4ng th\u1ec3 t\u1ef1 gi\u1ea3i quy\u1ebft v\u00e0 v\u1eabn c\u1ea7n ph\u1ea3i t\u00ecm ki\u1ebfm s\u1ef1 tr\u1ee3 gi\u00fap chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n

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S\u1ea3n ph\u1ea9m li\u00ean quan<\/h2>\n\n\n\n
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\u0110\u00e8n LED ch\u1ed1ng ch\u00e1y n\u1ed5<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n LED ch\u1ed1ng n\u01b0\u1edbc, ch\u1ed1ng b\u1ee5i v\u00e0 ch\u1ed1ng va \u0111\u1eadp<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n LED chi\u1ebfu s\u00e1ng r\u1ed9ng<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n \u0111\u01b0\u1eddng LED<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n\n\n\n
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