{"id":47924,"date":"2023-04-21T23:48:58","date_gmt":"2023-04-22T04:48:58","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-homemade-ultrasonic-generator\/"},"modified":"2025-01-21T07:19:42","modified_gmt":"2025-01-21T12:19:42","slug":"how-to-make-homemade-ultrasonic-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-make-homemade-ultrasonic-generator\/","title":{"rendered":"T\u1ef1 ch\u1ebf m\u00e1y ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n t\u1ea1i nh\u00e0"},"content":{"rendered":"<p>Vi\u1ec7c t\u1ea1o ra m\u1ed9t m\u00e1y ph\u00e1t si\u00eau \u00e2m t\u1ef1 ch\u1ebf c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t d\u1ef1 \u00e1n th\u00fa v\u1ecb v\u00e0 mang t\u00ednh gi\u00e1o d\u1ee5c, gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m. Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec7n t\u1eed v\u00e0 c\u00f3 th\u1ec3 ti\u1ec1m \u1ea9n m\u1ed9t s\u1ed1 r\u1ee7i ro n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1ch. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n c\u00e1ch l\u00e0m m\u1ed9t m\u00e1y ph\u00e1t si\u00eau \u00e2m \u0111\u01a1n gi\u1ea3n.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ph\u00e1t si\u00eau \u00e2m<\/h3>\n<p>M\u00e1y ph\u00e1t si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, bi\u1ebfn \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u00e2m c\u00f3 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi (th\u01b0\u1eddng tr\u00ean 20kHz).  M\u1ed9t b\u1ed9 ph\u1eadn quan tr\u1ecdng trong m\u00e1y ph\u00e1t si\u00eau \u00e2m l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n. Khi \u0111\u01b0\u1ee3c k\u00edch th\u00edch b\u1eb1ng t\u00edn hi\u1ec7u \u0111i\u1ec7n xoay chi\u1ec1u \u1edf t\u1ea7n s\u1ed1 si\u00eau \u00e2m, v\u1eadt li\u1ec7u n\u00e0y s\u1ebd dao \u0111\u1ed9ng v\u00e0 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m.<\/p>\n<h3>Linh ki\u1ec7n c\u1ea7n thi\u1ebft<\/h3>\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<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n (transducer)<\/td>\n<td>Th\u00e0nh ph\u1ea7n ch\u00ednh t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m. Ch\u1ecdn lo\u1ea1i c\u00f3 t\u1ea7n s\u1ed1 ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng.<\/td>\n<\/tr>\n<tr>\n<td>M\u1ea1ch dao \u0111\u1ed9ng<\/td>\n<td>T\u1ea1o ra t\u00edn hi\u1ec7u \u0111i\u1ec7n xoay chi\u1ec1u \u1edf t\u1ea7n s\u1ed1 si\u00eau \u00e2m \u0111\u1ec3 k\u00edch th\u00edch b\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/td>\n<\/tr>\n<tr>\n<td>Ngu\u1ed3n \u0111i\u1ec7n<\/td>\n<td>Cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ea1ch dao \u0111\u1ed9ng.<\/td>\n<\/tr>\n<tr>\n<td>D\u00e2y n\u1ed1i, b\u1ea3ng m\u1ea1ch<\/td>\n<td>\u0110\u1ec3 k\u1ebft n\u1ed1i c\u00e1c linh ki\u1ec7n.<\/td>\n<\/tr>\n<tr>\n<td>V\u1ecf h\u1ed9p (t\u00f9y ch\u1ecdn)<\/td>\n<td>\u0110\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ch v\u00e0 t\u1ea1o t\u00ednh th\u1ea9m m\u1ef9.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>X\u00e2y d\u1ef1ng m\u1ea1ch dao \u0111\u1ed9ng<\/h3>\n<p>M\u1ea1ch dao \u0111\u1ed9ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng IC 555 ho\u1eb7c c\u00e1c m\u1ea1ch dao \u0111\u1ed9ng kh\u00e1c. C\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng cho ph\u00f9 h\u1ee3p v\u1edbi t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t.  Vi\u1ec7c thi\u1ebft k\u1ebf m\u1ea1ch dao \u0111\u1ed9ng y\u00eau c\u1ea7u ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec7n t\u1eed. B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c s\u01a1 \u0111\u1ed3 m\u1ea1ch c\u00f3 s\u1eb5n tr\u00ean internet ho\u1eb7c trong c\u00e1c t\u00e0i li\u1ec7u chuy\u00ean ng\u00e0nh.<\/p>\n<h3>K\u1ebft n\u1ed1i c\u00e1c linh ki\u1ec7n<\/h3>\n<p>K\u1ebft n\u1ed1i b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n v\u1edbi m\u1ea1ch dao \u0111\u1ed9ng theo \u0111\u00fang s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111\u00e3 ch\u1ecdn. \u0110\u1ea3m b\u1ea3o c\u00e1c k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn v\u00e0 \u0111\u00fang c\u1ef1c. Sau \u0111\u00f3, k\u1ebft n\u1ed1i m\u1ea1ch dao \u0111\u1ed9ng v\u1edbi ngu\u1ed3n \u0111i\u1ec7n.<\/p>\n<h3>Ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>Sau khi ho\u00e0n th\u00e0nh vi\u1ec7c l\u1eafp r\u00e1p, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ph\u00e1t si\u00eau \u00e2m b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t microphone si\u00eau \u00e2m ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00e1n ti\u1ebfp kh\u00e1c.  L\u01b0u \u00fd kh\u00f4ng \u0111\u1ec3 tai ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i khi \u0111ang ho\u1ea1t \u0111\u1ed9ng.  Vi\u1ec7c ki\u1ec3m tra t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 s\u00f3ng si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng.<\/p>\n<p>Vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t si\u00eau \u00e2m c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t tr\u1ea3i nghi\u1ec7m th\u00fa v\u1ecb, tuy nhi\u00ean, c\u1ea7n th\u1eadn tr\u1ecdng trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n v\u00e0 t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u0169ng nh\u01b0 c\u00e1c bi\u1ec7n ph\u00e1p an to\u00e0n.  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.  Lu\u00f4n nh\u1edb r\u1eb1ng, an to\u00e0n l\u00e0 tr\u00ean h\u1ebft.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c t\u1ea1o ra m\u1ed9t m\u00e1y ph\u00e1t si\u00eau \u00e2m t\u1ef1 ch\u1ebf c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t d\u1ef1 \u00e1n th\u00fa v\u1ecb v\u00e0 mang t\u00ednh gi\u00e1o d\u1ee5c, gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m. Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c t\u1ef1 ch\u1ebf t\u1ea1o m\u00e1y ph\u00e1t si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c<\/p>\n","protected":false},"author":1,"featured_media":19249,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-47924","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\/47924","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=47924"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/47924\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/19249"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=47924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=47924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=47924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}