{"id":62291,"date":"2023-04-21T12:43:22","date_gmt":"2023-04-21T17:43:22","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/diy-frequency-generator\/"},"modified":"2025-01-27T06:02:58","modified_gmt":"2025-01-27T11:02:58","slug":"diy-frequency-generator","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/diy-frequency-generator\/","title":{"rendered":"Gener\u00e1tor frekvenc\u00ed: DIY n\u00e1vod a konstrukce"},"content":{"rendered":"

Gener\u00e1tor frekvenc\u00ed si m\u016f\u017eete postavit i doma. Zn\u00ed to slo\u017eit\u011b? Nen\u00ed to tak zl\u00e9, jak se zd\u00e1. Tento \u010dl\u00e1nek v\u00e1m poskytne podrobn\u00e9 informace o tom, jak si vyrobit jednoduch\u00fd gener\u00e1tor frekvenc\u00ed, a\u0165 u\u017e pro experiment\u00e1ln\u00ed \u00fa\u010dely, nebo pro specifick\u00e9 hobby projekty. Pochop\u00edte z\u00e1kladn\u00ed principy a nau\u010d\u00edte se vybrat vhodn\u00e9 sou\u010d\u00e1stky. <\/p>\n

Z\u00e1kladn\u00ed principy a typy gener\u00e1tor\u016f<\/h3>\n

Gener\u00e1tor frekvenc\u00ed je za\u0159\u00edzen\u00ed, kter\u00e9 produkuje elektrick\u00e9 sign\u00e1ly s definovanou frekvenc\u00ed. Existuje mnoho typ\u016f gener\u00e1tor\u016f, od jednoduch\u00fdch RC oscil\u00e1tor\u016f a\u017e po slo\u017eit\u00e9 gener\u00e1tory s \u0159\u00edzenou frekvenc\u00ed pomoc\u00ed mikrokontrol\u00e9r\u016f. Pro DIY projekty jsou nejvhodn\u011bj\u0161\u00ed jednoduch\u00e9 obvody, kter\u00e9 vy\u017eaduj\u00ed minimum sou\u010d\u00e1stek a znalost\u00ed elektroniky. Z\u00e1kladn\u00ed principy fungov\u00e1n\u00ed se op\u00edraj\u00ed o vlastnosti pasivn\u00edch a aktivn\u00edch elektronick\u00fdch sou\u010d\u00e1stek, jako jsou rezistory, kondenz\u00e1tory, induktory a opera\u010dn\u00ed zesilova\u010de. Jednoduch\u00e9 gener\u00e1tory frekvenc\u00ed se obvykle d\u011bl\u00ed na tyto typy: RC oscil\u00e1tory (nap\u0159. Wien\u016fv m\u016fstek), LC oscil\u00e1tory (nap\u0159. Colpitts\u016fv oscil\u00e1tor) a gener\u00e1tory s krystalem.<\/p>\n

V\u00fdb\u011br sou\u010d\u00e1stek pro jednoduch\u00fd RC oscil\u00e1tor<\/h3>\n

Pro za\u010d\u00e1te\u010dn\u00edky je nejvhodn\u011bj\u0161\u00ed RC oscil\u00e1tor, kter\u00fd se skl\u00e1d\u00e1 z minim\u00e1ln\u00edho po\u010dtu sou\u010d\u00e1stek. Z\u00e1kladn\u00edmi sou\u010d\u00e1stkami jsou opera\u010dn\u00ed zesilova\u010d (nap\u0159. 741), dva rezistory a dva kondenz\u00e1tory. Frekvence generovan\u00e9ho sign\u00e1lu je ur\u010dena hodnotami rezistor\u016f a kondenz\u00e1tor\u016f. N\u00ed\u017ee naleznete tabulku s p\u0159\u00edklady hodnot a v\u00fdsledn\u00fdch frekvenc\u00ed.<\/p>\n\n\n\n\n\n\n\n\n
Hodnota R1 (\u03a9)<\/th>\nHodnota R2 (\u03a9)<\/th>\nHodnota C1 (\u00b5F)<\/th>\nHodnota C2 (\u00b5F)<\/th>\nFrekvence (Hz) (p\u0159ibli\u017en\u00e1)<\/th>\n<\/tr>\n<\/thead>\n
10k<\/td>\n10k<\/td>\n0.1<\/td>\n0.1<\/td>\n159<\/td>\n<\/tr>\n
1k<\/td>\n1k<\/td>\n1<\/td>\n1<\/td>\n1590<\/td>\n<\/tr>\n
10k<\/td>\n10k<\/td>\n0.01<\/td>\n0.01<\/td>\n1590<\/td>\n<\/tr>\n
100k<\/td>\n100k<\/td>\n0.01<\/td>\n0.01<\/td>\n15.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pozn\u00e1mka:<\/strong> Frekvence je pouze p\u0159ibli\u017en\u00e1 a z\u00e1vis\u00ed na toleranci sou\u010d\u00e1stek.<\/p>\n

Zapojen\u00ed a konstrukce gener\u00e1toru<\/h3>\n

Po v\u00fdb\u011bru sou\u010d\u00e1stek je nutn\u00e9 je spr\u00e1vn\u011b zapojit podle sch\u00e9matu. Existuje mnoho online zdroj\u016f s podrobn\u011bj\u0161\u00edmi sch\u00e9maty zapojen\u00ed RC oscil\u00e1tor\u016f. Po sestaven\u00ed obvodu je nutn\u00e9 jej otestovat pomoc\u00ed multimetru nebo osciloskopu. Pro za\u010d\u00e1te\u010dn\u00edky se doporu\u010duje pou\u017eit\u00ed prototypovac\u00ed desky pro snaz\u0161\u00ed zapojen\u00ed a zm\u011bny.<\/p>\n

Pokro\u010dilej\u0161\u00ed gener\u00e1tory a mo\u017enosti roz\u0161\u00ed\u0159en\u00ed<\/h3>\n

Pro generov\u00e1n\u00ed p\u0159esn\u011bj\u0161\u00edch frekvenc\u00ed a \u0161ir\u0161\u00edho rozsahu frekvenc\u00ed je mo\u017en\u00e9 pou\u017e\u00edt mikrokontrol\u00e9ry (Arduino, ESP32). Tyto umo\u017e\u0148uj\u00ed digit\u00e1ln\u00ed \u0159\u00edzen\u00ed frekvence a generov\u00e1n\u00ed r\u016fzn\u00fdch tvar\u016f sign\u00e1l\u016f. Pro generov\u00e1n\u00ed ultrazvukov\u00fdch frekvenc\u00ed je nutn\u00e9 pou\u017e\u00edt specifick\u00e9 sou\u010d\u00e1stky a obvody, kter\u00e9 jsou schopny pracovat s t\u011bmito vysok\u00fdmi frekvencemi. V takov\u00fdch p\u0159\u00edpadech m\u016f\u017ee b\u00fdt nutn\u00e9 zv\u00e1\u017eit pou\u017eit\u00ed specializovan\u00fdch komponent\u016f, ale pro z\u00e1kladn\u00ed DIY projekty to nen\u00ed nutn\u00e9.<\/p>\n

Bezpe\u010dnostn\u00ed opat\u0159en\u00ed<\/h3>\n

P\u0159i pr\u00e1ci s elektronikou je v\u017edy d\u016fle\u017eit\u00e9 dodr\u017eovat bezpe\u010dnostn\u00ed opat\u0159en\u00ed. V\u017edy se ujist\u011bte, \u017ee m\u00e1te odpov\u00eddaj\u00edc\u00ed znalosti a zku\u0161enosti s elektronikou, ne\u017e za\u010dnete s konstrukc\u00ed gener\u00e1toru frekvenc\u00ed. P\u0159i pr\u00e1ci s vysok\u00fdmi nap\u011bt\u00edmi a proudy se doporu\u010duje pou\u017e\u00edvat ochrann\u00e9 pom\u016fcky.<\/p>\n

Jednoduch\u00fd gener\u00e1tor frekvenc\u00ed je skv\u011bl\u00fd projekt pro za\u010d\u00e1te\u010dn\u00edky, kter\u00fd umo\u017e\u0148uje pochopit z\u00e1kladn\u00ed principy elektroniky a experimentovat s generov\u00e1n\u00edm r\u016fzn\u00fdch frekvenc\u00ed. Dodr\u017eov\u00e1n\u00ed bezpe\u010dnostn\u00edch opat\u0159en\u00ed a postupn\u00e9 zvl\u00e1d\u00e1n\u00ed n\u00e1ro\u010dnosti projektu v\u00e1m zaru\u010d\u00ed \u00fasp\u011bch a spoustu z\u00e1bavy p\u0159i objevov\u00e1n\u00ed sv\u011bta elektroniky.<\/p>\n","protected":false},"excerpt":{"rendered":"

Gener\u00e1tor frekvenc\u00ed si m\u016f\u017eete postavit i doma. Zn\u00ed to slo\u017eit\u011b? Nen\u00ed to tak zl\u00e9, jak se zd\u00e1. Tento \u010dl\u00e1nek v\u00e1m poskytne podrobn\u00e9 informace o tom, jak si vyrobit jednoduch\u00fd gener\u00e1tor frekvenc\u00ed, a\u0165 u\u017e pro experiment\u00e1ln\u00ed \u00fa\u010dely, nebo pro specifick\u00e9 hobby projekty. Pochop\u00edte z\u00e1kladn\u00ed principy a nau\u010d\u00edte se vybrat vhodn\u00e9 sou\u010d\u00e1stky. Z\u00e1kladn\u00ed principy a typy gener\u00e1tor\u016f<\/p>\n","protected":false},"author":1,"featured_media":19348,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=62291"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62291\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19348"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}