{"id":86,"date":"2011-08-28T23:55:36","date_gmt":"2011-08-28T21:55:36","guid":{"rendered":"http:\/\/blog.copcea.ro\/?p=86"},"modified":"2011-09-23T20:34:03","modified_gmt":"2011-09-23T18:34:03","slug":"frecven%c8%9bmetru-50-mhz","status":"publish","type":"post","link":"http:\/\/blog.copcea.ro\/?p=86","title":{"rendered":"Frecven\u021bmetru 50 MHz"},"content":{"rendered":"<div class=\"02a7dab7e6fe5a0fbf433999ff85f046\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script type=\"text\/javascript\"><!--\r\ngoogle_ad_client = \"ca-pub-2343103762362018\";\r\n\/* 336x280 *\/\r\ngoogle_ad_slot = \"8815738048\";\r\ngoogle_ad_width = 336;\r\ngoogle_ad_height = 280;\r\n\/\/-->\r\n<\/script>\r\n<script type=\"text\/javascript\"\r\nsrc=\"http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\">\r\n<\/script>\n<\/div>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p><strong>Frecven\u021bmetru 50 MHz<\/strong><\/p>\n<p>Schema de mai jos este cea a unui frecven\u021bmetru de 50 MHz cu afi\u0219aj digital, dup\u0103 o schem\u0103 clasic\u0103, creat exclusiv cu circuite TTL \u0219i CMOS.<br \/>\nFrecven\u021bmetrul poate fi utilizat \u0219i pentru a m\u0103sura direct quarz-uri dar poate fi utilizat \u0219i ca sond\u0103 logic\u0103 de nivel TTL prin intermediul afi\u0219ajului suplimentar de nivel logic (acesta afi\u0219eaz\u0103 &#8220;0&#8221; pentru nivel logic zero, &#8220;1&#8221; pentru nivel logic 1 \u0219i nu afi\u0219eaz\u0103 nimic dac\u0103 sonda este \u00een aer.<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p><strong>Fr\u00e9quencem\u00e8tre 50 MHz<\/strong><\/p>\n<p>Le sch\u00e9ma ci-dessous est celle d&#8217;un fr\u00e9quencem\u00e8tre de 50 MHz \u00e0 affichage num\u00e9rique, con\u00e7u apr\u00e8s un sch\u00e9ma classique, cr\u00e9e en exclusivit\u00e9 avec des circuits TTL et CMOS.<br \/>\nLe fr\u00e9quencem\u00e8tre peut \u00eatre utilis\u00e9 aussi pour mesurer directement des oscillateur \u00e0 quarz mais il peut \u00eatre utilis\u00e9 aussi en tant que sonde logique au niveau TTL par l&#8217;interm\u00e9diaire de l&#8217;affichage suppl\u00e9mentaire de niveau logique (celui-ci affiche &#8220;0&#8221; pour un niveau logique z\u00e9ro, &#8220;1&#8221; pour un niveau logique 1 et n&#8217;affiche rien si la sonde reste d\u00e9connect\u00e9e.<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p><strong>50 MHz Frequency-meter<\/strong><\/p>\n<p>The schematic below is that of a 50 MHz frequency-meter with digital display, made after a classic schematic, and uses exclusively TTL and CMOS ICs.<br \/>\nThe frequency-meter can be used to directly measure quarz oscillators but it can also be used as logical probe at TTL level by uing the supplementary logical display (it displays &#8220;0&#8221; for zero logical level, &#8220;1&#8221; for 1 logical level and does not display anything is the probe is not connected.<\/p>\n<\/div>\n<p><a rel=\"attachment wp-att-87\" href=\"http:\/\/blog.copcea.ro\/?attachment_id=87\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-87\" title=\"Schema frecventmetru digital\" src=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/frecventzmetru2-300x211.png\" alt=\"\" width=\"300\" height=\"211\" srcset=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/frecventzmetru2-300x211.png 300w, http:\/\/blog.copcea.ro\/wp-content\/uploads\/frecventzmetru2-1024x723.png 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p style=\"text-align: center;\">Schem\u0103 circuit<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p style=\"text-align: center;\">Sch\u00e9ma circuit<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p style=\"text-align: center;\">Circuit Schematic<\/p>\n<\/div>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p>Schema \u00een format PDF poate fi desc\u0103rcat\u0103 de <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.pdf\" target=\"_blank\">aici<\/a>.<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.sch\">Aici <\/a> pute\u021bi desc\u0103rca schema \u00een format Eagle iar <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.brd\">aici <\/a> cablajul \u00een acela\u0219i format (versiunea nou\u0103 cu 74LS390).<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.sch\">Aici <\/a> pute\u021bi desc\u0103rca schema \u00een format Eagle iar <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.brd\">aici <\/a> cablajul \u00een acela\u0219i format (versiunea veche cu 74LS90).<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p>Le sch\u00e9ma en format PDF peut \u00eatre t\u00e9l\u00e9charg\u00e9 <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.pdf\" target=\"blank\">ici<\/a>.<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.sch\">Ici <\/a> vous pouvez t\u00e9l\u00e9charg\u00e9r le sch\u00e9ma en format Eagle et <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.brd\">ici <\/a> le c\u00e2blage dans le m\u00eame format (nouvelle version avec 74LS390).<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.sch\">Ici <\/a> vous pouvez t\u00e9l\u00e9charg\u00e9r le sch\u00e9ma en format Eagle et <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.brd\">ici <\/a> le c\u00e2blage dans le m\u00eame format (ancienne version avec 74LS90).<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p>The PDF schematic can be downloaded <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.pdf\" target=\"blank\">here<\/a>.<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.sch\">Here<\/a> you can download the schematic in Eagle format and <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru2.brd\">here<\/a> the board in the same format (new version using 74LS390).<br \/>\n<a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.sch\">Here<\/a> you can download the schematic in Eagle format and <a href=\"http:\/\/blog.copcea.ro\/files\/Frecventzmetru1.brd\">here<\/a> the board in the same format (old version using 74LS90).<\/p>\n<\/div>\n<p><a rel=\"attachment wp-att-104\" href=\"http:\/\/blog.copcea.ro\/?attachment_id=104\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-104\" title=\"Poza spate\" src=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00099-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00099-300x225.jpg 300w, http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00099-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p style=\"text-align: center;\">Imagine spate<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p style=\"text-align: center;\">Image derri\u00e8re<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p style=\"text-align: center;\">Rear Image<\/p>\n<\/div>\n<p><a rel=\"attachment wp-att-103\" href=\"http:\/\/blog.copcea.ro\/?attachment_id=103\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-103\" title=\"poza fata\" src=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00098-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00098-300x225.jpg 300w, http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00098-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p style=\"text-align: center;\">Imagine fa\u021b\u0103<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p style=\"text-align: center;\">Image frontale<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p style=\"text-align: center;\">Front image<\/p>\n<\/div>\n<p><a rel=\"attachment wp-att-102\" href=\"http:\/\/blog.copcea.ro\/?attachment_id=102\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-102\" title=\"Poza sus\" src=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00097-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00097-300x225.jpg 300w, http:\/\/blog.copcea.ro\/wp-content\/uploads\/DSC00097-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<div class='ro' style='' lang='ro' dir='ltr'>\n<p style=\"text-align: center;\">Imagine sus<\/p>\n<\/div>\n<div class='fr' style='display:none;' lang='fr' dir='ltr'>\n<p style=\"text-align: center;\">Image dessus<\/p>\n<\/div>\n<div class='en' style='display:none;' lang='en' dir='ltr'>\n<p style=\"text-align: center;\">Top image<\/p>\n<\/div>\n<p style=\"text-align: center;\">\n<p style=\"text-align: center;\">\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Frecven\u021bmetru 50 MHz Schema de mai jos este cea a unui frecven\u021bmetru de 50 MHz cu afi\u0219aj digital, dup\u0103 o schem\u0103 clasic\u0103, creat exclusiv cu circuite TTL \u0219i CMOS. Frecven\u021bmetrul poate fi utilizat \u0219i pentru a m\u0103sura direct quarz-uri dar poate fi utilizat \u0219i ca sond\u0103 logic\u0103 de nivel TTL prin intermediul afi\u0219ajului suplimentar de <a href='http:\/\/blog.copcea.ro\/?p=86' class='excerpt-more'>[&#8230;]<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12,13],"tags":[137,139,138],"_links":{"self":[{"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/posts\/86"}],"collection":[{"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=86"}],"version-history":[{"count":47,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/posts\/86\/revisions"}],"predecessor-version":[{"id":338,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=\/wp\/v2\/posts\/86\/revisions\/338"}],"wp:attachment":[{"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=86"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=86"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.copcea.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=86"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}