{"id":52516,"date":"2023-04-21T12:46:01","date_gmt":"2023-04-21T17:46:01","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/diy-high-frequency-sound-generator\/"},"modified":"2025-01-21T07:07:54","modified_gmt":"2025-01-21T12:07:54","slug":"diy-high-frequency-sound-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/diy-high-frequency-sound-generator\/","title":{"rendered":"T\u1ef1 ch\u1ebf m\u00e1y t\u1ea1o \u00e2m thanh t\u1ea7n s\u1ed1 cao"},"content":{"rendered":"<p>\u00c2m thanh t\u1ea7n s\u1ed1 cao, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 si\u00eau \u00e2m, c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c, t\u1eeb \u0111u\u1ed5i c\u00f4n tr\u00f9ng \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 trang s\u1ee9c.  Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t d\u1ef1 \u00e1n \u0111i\u1ec7n t\u1eed th\u00fa v\u1ecb m\u00e0 c\u00f2n gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng \u00e2m. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao \u0111\u01a1n gi\u1ea3n b\u1eb1ng nh\u1eefng linh ki\u1ec7n d\u1ec5 t\u00ecm.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>M\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd dao \u0111\u1ed9ng c\u1ee7a c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed, c\u1ee5 th\u1ec3 l\u00e0 s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ch dao \u0111\u1ed9ng \u0111\u1ec3 t\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n xoay chi\u1ec1u v\u1edbi t\u1ea7n s\u1ed1 cao. T\u00edn hi\u1ec7u n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i v\u00e0 \u0111\u01b0a v\u00e0o m\u1ed9t b\u1ed9 ph\u1eadn ph\u00e1t \u00e2m, th\u01b0\u1eddng l\u00e0 m\u1ed9t loa piezo, \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh s\u00f3ng \u00e2m. T\u1ea7n s\u1ed1 c\u1ee7a s\u00f3ng \u00e2m \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00e1c th\u00e0nh ph\u1ea7n trong m\u1ea1ch dao \u0111\u1ed9ng, ch\u1ee7 y\u1ebfu l\u00e0 t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m.<\/p>\n<h3>Linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\n<p>\u0110\u1ec3 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t, b\u1ea1n s\u1ebd c\u1ea7n nh\u1eefng linh ki\u1ec7n sau:<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Linh ki\u1ec7n<\/th>\n<th>M\u00f4 t\u1ea3<\/th>\n<th>S\u1ed1 l\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>IC 555<\/td>\n<td>B\u1ed9 \u0111\u1ecbnh th\u1eddi 555<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n tr\u1edf<\/td>\n<td>1k\u03a9, 10k\u03a9<\/td>\n<td>1 m\u1ed7i lo\u1ea1i<\/td>\n<\/tr>\n<tr>\n<td>T\u1ee5 \u0111i\u1ec7n<\/td>\n<td>10nF, 100nF<\/td>\n<td>1 m\u1ed7i lo\u1ea1i<\/td>\n<\/tr>\n<tr>\n<td>Loa Piezo<\/td>\n<td>Loa g\u1ed1m \u00e1p \u0111i\u1ec7n<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>Ngu\u1ed3n \u0111i\u1ec7n<\/td>\n<td>9V<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3ng m\u1ea1ch<\/td>\n<td><\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>D\u00e2y n\u1ed1i<\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>S\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/h3>\n<p>S\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n cho m\u00e1y ph\u00e1t kh\u00e1 \u0111\u01a1n gi\u1ea3n. Ch\u00e2n 1 c\u1ee7a IC 555 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi \u0111\u1ea5t, ch\u00e2n 8 n\u1ed1i v\u1edbi ngu\u1ed3n d\u01b0\u01a1ng. Ch\u00e2n 2 v\u00e0 6 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi nhau v\u00e0 n\u1ed1i v\u1edbi m\u1ed9t \u0111\u1ea7u c\u1ee7a t\u1ee5 \u0111i\u1ec7n 10nF, \u0111\u1ea7u c\u00f2n l\u1ea1i c\u1ee7a t\u1ee5 n\u00e0y n\u1ed1i v\u1edbi \u0111\u1ea5t.  Ch\u00e2n 7 n\u1ed1i v\u1edbi \u0111i\u1ec7n tr\u1edf 10k\u03a9, \u0111\u1ea7u c\u00f2n l\u1ea1i c\u1ee7a \u0111i\u1ec7n tr\u1edf n\u00e0y n\u1ed1i v\u1edbi ngu\u1ed3n d\u01b0\u01a1ng v\u00e0 ch\u00e2n 3.  Gi\u1eefa ch\u00e2n 3 v\u00e0 \u0111\u1ea5t, n\u1ed1i loa piezo. T\u1ee5 \u0111i\u1ec7n 100nF \u0111\u01b0\u1ee3c n\u1ed1i song song v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ec3 l\u1ecdc nhi\u1ec5u.<\/p>\n<h3>Quy tr\u00ecnh l\u1eafp r\u00e1p<\/h3>\n<p>\u0110\u1ea7u ti\u00ean, g\u1eafn c\u00e1c linh ki\u1ec7n l\u00ean b\u1ea3ng m\u1ea1ch.  Sau \u0111\u00f3, h\u00e0n c\u00e1c ch\u00e2n linh ki\u1ec7n theo s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n \u0111\u00e3 m\u00f4 t\u1ea3.  C\u1ea7n ch\u00fa \u00fd h\u00e0n \u0111\u00fang c\u1ef1c c\u1ee7a t\u1ee5 \u0111i\u1ec7n v\u00e0 loa piezo. Cu\u1ed1i c\u00f9ng, ki\u1ec3m tra l\u1ea1i c\u00e1c m\u1ed1i h\u00e0n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 l\u1ed7i.<\/p>\n<h3>Ki\u1ec3m tra v\u00e0 hi\u1ec7u ch\u1ec9nh<\/h3>\n<p>Sau khi ho\u00e0n th\u00e0nh vi\u1ec7c l\u1eafp r\u00e1p, k\u1ebft n\u1ed1i ngu\u1ed3n \u0111i\u1ec7n 9V.  N\u1ebfu m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang, b\u1ea1n s\u1ebd nghe th\u1ea5y ti\u1ebfng k\u00eau t\u1ea7n s\u1ed1 cao ph\u00e1t ra t\u1eeb loa piezo. N\u1ebfu kh\u00f4ng nghe th\u1ea5y \u00e2m thanh, h\u00e3y ki\u1ec3m tra l\u1ea1i c\u00e1c m\u1ed1i h\u00e0n v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c l\u1eafp \u0111\u00fang v\u1ecb tr\u00ed.  B\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i gi\u00e1 tr\u1ecb c\u1ee7a t\u1ee5 \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n tr\u1edf \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 c\u1ee7a \u00e2m thanh.  V\u00ed d\u1ee5, n\u1ebfu c\u1ea7n t\u1ea7n s\u1ed1 cao h\u01a1n cho \u1ee9ng d\u1ee5ng \u0111u\u1ed5i c\u00f4n tr\u00f9ng nh\u1ea5t \u0111\u1ecbnh, vi\u1ec7c gi\u1ea3m gi\u00e1 tr\u1ecb t\u1ee5 \u0111i\u1ec7n c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p.<\/p>\n<h3>L\u01b0u \u00fd an to\u00e0n<\/h3>\n<p>\u00c2m thanh t\u1ea7n s\u1ed1 cao c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 ch\u1ecbu ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y h\u1ea1i cho th\u00ednh gi\u00e1c n\u1ebfu ti\u1ebfp x\u00fac trong th\u1eddi gian d\u00e0i v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 l\u1edbn.  V\u00ec v\u1eady, h\u00e3y h\u1ea1n ch\u1ebf th\u1eddi gian ti\u1ebfp x\u00fac v\u00e0 kh\u00f4ng \u0111\u1ec3 loa piezo g\u1ea7n tai khi m\u00e1y ph\u00e1t \u0111ang ho\u1ea1t \u0111\u1ed9ng.  \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 nh\u01b0 l\u00e0m s\u1ea1ch b\u1eb1ng si\u00eau \u00e2m, n\u1ebfu c\u01b0\u1eddng \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng an to\u00e0n, c\u1ea7n tham kh\u1ea3o c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng v\u00e0 tu\u00e2n th\u1ee7 h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng.  M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng si\u00eau \u00e2m chuy\u00ean bi\u1ec7t, v\u00ed d\u1ee5 nh\u01b0 trong l\u0129nh v\u1ef1c y t\u1ebf hay c\u00f4ng nghi\u1ec7p, \u0111\u00f2i h\u1ecfi thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c v\u00e0 an to\u00e0n h\u01a1n.  N\u1ebfu c\u1ea7n thi\u1ebft ph\u1ea3i s\u1eed d\u1ee5ng si\u00eau \u00e2m v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 cao, c\u1ea7n tham kh\u1ea3o \u00fd ki\u1ebfn chuy\u00ean gia v\u00e0 c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t uy t\u00edn nh\u01b0 Beijing Ultrasonic n\u1ebfu \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn l\u00e0m s\u1ea1ch si\u00eau \u00e2m c\u00f4ng nghi\u1ec7p.<\/p>\n<p>Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao l\u00e0 m\u1ed9t tr\u1ea3i nghi\u1ec7m th\u00fa v\u1ecb v\u00e0 b\u1ed5 \u00edch.  Tuy nhi\u00ean, c\u1ea7n tu\u00e2n th\u1ee7 c\u00e1c l\u01b0u \u00fd an to\u00e0n \u0111\u1ec3 tr\u00e1nh nh\u1eefng t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn s\u1ee9c kh\u1ecfe.  Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 b\u1eaft \u0111\u1ea7u kh\u00e1m ph\u00e1 th\u1ebf gi\u1edbi \u00e2m thanh t\u1ea7n s\u1ed1 cao.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c2m thanh t\u1ea7n s\u1ed1 cao, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 si\u00eau \u00e2m, c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u00fa v\u1ecb v\u00e0 thi\u1ebft th\u1ef1c, t\u1eeb \u0111u\u1ed5i c\u00f4n tr\u00f9ng \u0111\u1ebfn l\u00e0m s\u1ea1ch \u0111\u1ed3 trang s\u1ee9c. Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u1ed9t m\u00e1y ph\u00e1t \u00e2m thanh t\u1ea7n s\u1ed1 cao kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t d\u1ef1 \u00e1n \u0111i\u1ec7n t\u1eed th\u00fa v\u1ecb m\u00e0 c\u00f2n gi\u00fap<\/p>\n","protected":false},"author":1,"featured_media":26476,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-52516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/52516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=52516"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/52516\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26476"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=52516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=52516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=52516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}