{"id":15721,"date":"2026-01-06T19:54:19","date_gmt":"2026-01-06T11:54:19","guid":{"rendered":"http:\/\/www.erun-tech.com\/?post_type=dt_portfolio&p=15721"},"modified":"2026-01-06T19:54:19","modified_gmt":"2026-01-06T11:54:19","slug":"dianzigongyijinjiedianzixianludejichuzhishi","status":"publish","type":"dt_portfolio","link":"http:\/\/www.erun-tech.com\/vi\/project\/dianzigongyijinjiedianzixianludejichuzhishi","title":{"rendered":"N\u00e2ng cao k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed: Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 m\u1ea1ch \u0111i\u1ec7n t\u1eed"},"content":{"rendered":"
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N\u00e2ng cao k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed: Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/h1>\n
Ph\u00e2n t\u00edch m\u1ea1ch \u0111i\u1ec7n \u00b7 Th\u1ef1c h\u00e0nh m\u1ea1ch \u1ed5n \u00e1p v\u00e0 s\u1ea1c<\/div>\n<\/div>\n
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I. M\u1ea1ch \u0111i\u1ec7n t\u1eed \u0111\u01a1n gi\u1ea3n<\/h2>\n
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1. M\u1ea1ch t\u00edch h\u1ee3p \u1ed5n \u00e1p ba c\u1ef1c 7805<\/div>\n
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7805 l\u00e0 m\u1ed9t m\u1ea1ch t\u00edch h\u1ee3p \u1ed5n \u00e1p ba ch\u00e2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn, nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 14-2. Mi\u1ec5n l\u00e0 ch\u1ecdn linh ki\u1ec7n theo c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong s\u01a1 \u0111\u1ed3 v\u00e0 h\u00e0n \u0111\u00fang c\u00e1ch, m\u1ea1ch s\u1ebd cung c\u1ea5p \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh 5 V m\u00e0 kh\u00f4ng c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh. C\u00e1c linh ki\u1ec7n $C_1$ v\u00e0 $C_2$ trong h\u00ecnh \u0111\u1ec1u l\u00e0 t\u1ee5 l\u1ecdc ngu\u1ed3n, trong \u0111\u00f3 $C_1$ c\u00f3 \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u01b0\u1ee3c l\u00e0 10 V, c\u00f2n $C_2$ y\u00eau c\u1ea7u \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u01b0\u1ee3c \u226516 V. \u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ee7a m\u1ea1ch \u1ed5n \u00e1p n\u00e0y \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh \u1edf m\u1ee9c 5 V, d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra t\u1ed1i \u0111a l\u00e0 1,5 A.<\/p>\n

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\"859872047cd63c1c0fb0cb68b9cfd4c1\"<\/p>\n

H\u00ecnh 14-2: M\u1ea1ch t\u00edch h\u1ee3p \u1ed5n \u00e1p ba c\u1ef1c 7805<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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2. Ph\u00e2n t\u00edch m\u1ea1ch s\u1ea1c pin<\/div>\n
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M\u1ea1ch s\u1ea1c pin \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong H\u00ecnh 14-3. C\u00f4ng t\u1eafc ch\u1ecdn S \u0111i\u1ec1u khi\u1ec3n c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n s\u1ea1c, c\u00f3 hai v\u1ecb tr\u00ed l\u00e0 100 mA v\u00e0 50 mA; \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n LED \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u1ec3n th\u1ecb v\u1ecb tr\u00ed c\u1ee7a c\u00f4ng t\u1eafc S v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n s\u1ea1c. $R_5$ l\u00e0 \u0111i\u1ec7n tr\u1edf gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n cho \u0111\u00e8n LED, gi\u00fap gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n \u0111i qua \u0111\u00e8n LED \u1edf m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh.<\/p>\n

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Ph\u00e2n t\u00edch nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng:<\/strong><\/p>\n

Khi c\u00f4ng t\u1eafc S \u1edf v\u1ecb tr\u00ed 100 mA nh\u01b0 th\u1ec3 hi\u1ec7n trong H\u00ecnh 14-3, \u0111i\u1ec7n \u00e1p c\u1ef1c c\u01a1 s\u1edf c\u1ee7a b\u00f3ng b\u00e1n d\u1eabn T \u1ed5n \u0111\u1ecbnh \u1edf m\u1ee9c 6 V, \u0111i\u1ec7n \u00e1p c\u1ef1c ph\u00e1t c\u1ee7a n\u00f3 kho\u1ea3ng 5,4 V, v\u00e0 \u0111i\u1ec7n \u00e1p n\u00e0y \u0111\u01b0\u1ee3c chia cho t\u1ed5ng \u0111i\u1ec7n tr\u1edf c\u1ee7a $R_4$ v\u00e0 $R_2$ (d\u00f2ng \u0111i\u1ec7n qua LED n\u1ed1i ti\u1ebfp $R_5$ kho\u1ea3ng 5 mA, \u0111\u01b0\u1ee3c b\u1ecf qua khi t\u00ednh to\u00e1n), d\u00f2ng \u0111i\u1ec7n thu \u0111\u01b0\u1ee3c kho\u1ea3ng 100 mA, t\u1ee9c l\u00e0 d\u00f2ng s\u1ea1c c\u1ee7a pin l\u00e0 100 mA. T\u01b0\u01a1ng t\u1ef1, n\u1ebfu c\u00f4ng t\u1eafc S \u1edf v\u1ecb tr\u00ed 50 mA, th\u00ec d\u00f2ng s\u1ea1c c\u1ee7a pin l\u00e0 50 mA.<\/p>\n<\/div>\n

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\"ec0414ab7886bd08a5d718b88b954f84\"<\/p>\n

H\u00ecnh 14-3 M\u1ea1ch s\u1ea1c pin<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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II. Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m ho\u00e0n thi\u1ec7n<\/h2>\n
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(1) C\u00e1c ch\u00e2n linh ki\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c h\u00e0n vu\u00f4ng g\u00f3c v\u1edbi b\u1ea3ng m\u1ea1ch, kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ec7ch hay nghi\u00eang. C\u00e1c linh ki\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed h\u1ee3p l\u00fd, g\u1ecdn g\u00e0ng v\u00e0 th\u1ea9m m\u1ef9.<\/p>\n

(2) C\u00e1c \u0111i\u1ec3m h\u00e0n nh\u1eb5n m\u1ecbn, l\u01b0\u1ee3ng thi\u1ebfc v\u1eeba \u0111\u1ee7. D\u00f2ng thi\u1ebfc ch\u1ea3y \u0111\u1ec1u v\u00e0 g\u1ecdn g\u00e0ng.<\/p>\n

(3) C\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng m\u1ea1ch.<\/p>\n

(4) Sau khi h\u00e0n xong, c\u1ea7n \u0111\u1eb7t v\u00e0 b\u1ea3o qu\u1ea3n m\u1ecf h\u00e0n m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd.<\/p>\n

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  • <\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

    N\u00e2ng cao k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed: Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 m\u1ea1ch \u0111i\u1ec7n t\u1eed Ph\u00e2n t\u00edch m\u1ea1ch \u0111i\u1ec7n \u00b7 Th\u1ef1c h\u00e0nh m\u1ea1ch \u1ed5n \u00e1p v\u00e0 s\u1ea1c pin I. M\u1ea1ch \u0111i\u1ec7n t\u1eed \u0111\u01a1n gi\u1ea3n 1. 7805 ba ch\u00e2n \u1ed5n \u00e1p...<\/p>","protected":false},"author":1,"featured_media":15724,"comment_status":"open","ping_status":"closed","template":"","dt_portfolio_category":[891],"dt_portfolio_tags":[],"class_list":["post-15721","dt_portfolio","type-dt_portfolio","status-publish","has-post-thumbnail","hentry","dt_portfolio_category-dianzidianqiyuanshicaopinggukecheng","dt_portfolio_category-891","description-off"],"_links":{"self":[{"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio\/15721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio"}],"about":[{"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/types\/dt_portfolio"}],"author":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/comments?post=15721"}],"version-history":[{"count":1,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio\/15721\/revisions"}],"predecessor-version":[{"id":15725,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio\/15721\/revisions\/15725"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/media\/15724"}],"wp:attachment":[{"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=15721"}],"wp:term":[{"taxonomy":"dt_portfolio_category","embeddable":true,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio_category?post=15721"},{"taxonomy":"dt_portfolio_tags","embeddable":true,"href":"http:\/\/www.erun-tech.com\/vi\/wp-json\/wp\/v2\/dt_portfolio_tags?post=15721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}