{"id":277,"date":"2023-08-25T00:49:06","date_gmt":"2023-08-24T23:49:06","guid":{"rendered":"https:\/\/www.tuxik.cz\/?p=277"},"modified":"2023-08-26T02:55:31","modified_gmt":"2023-08-26T01:55:31","slug":"kalkulacky-elektronickych-velicin","status":"publish","type":"post","link":"http:\/\/tuxik.cz\/?p=277","title":{"rendered":"Kalkula\u010dky elektronick\u00fdch veli\u010din"},"content":{"rendered":"\n<p>Ob\u010das se hod\u00ed spo\u010d\u00edtat r\u016fzn\u00e9 veli\u010diny, a i kdy\u017e je na internetu podobn\u00fdch kalkula\u010dek plno, l\u00edbilo by se mi je m\u00edt po ruce na jednom m\u00edst\u011b. Proto jich sem p\u00e1r postupn\u011b vlo\u017e\u00edm, prim\u00e1rn\u011b pro sebe, ale nebojte se je pou\u017e\u00edt taky.<\/p>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">dBm\/Watt<\/span><\/strong><\/p>\n\n\n\n<script type=\"text\/javascript\">\nfunction dBm_mW (y){\n x = Math.pow(10,y\/10);\n  return x\n}\nfunction spoctidbmw(){\n\n  var dBm = document.all.dBm.value;\n\n  var mWatt = document.getElementById(\"mWatt\");\n  var Watt = document.getElementById(\"Watt\");\nconsole.log(dBm_mW(dBm));\n  mWatt.innerHTML = dBm_mW(dBm);\n  Watt.innerHTML = mW_Watt(dBm);\n}\nfunction mW_Watt (x){\n  q = dBm_mW(x)\/1000;\n  return q\n}\n<\/script>\n<table border=\"0\">\n<form>\n<tr><th>dBm\/W<\/th><\/tr>\n<tr><td>dBm<\/td><td><input name=\"dBm\" type=\"text\" \/><\/td><\/tr>\n<tr><td>V\u00fdkon (mW):<\/td><td><span id=\"mWatt\">&nbsp;<\/span><\/td><\/tr>\n<tr><td>V\u00fdkon (W):<\/td><td><span id=\"Watt\">&nbsp;<\/span><\/tr>\n<tr><td colspan=\"2\"><input type=\"button\" onclick=\"spoctidbmw();\" value=\"Spo\u010d\u00edtej\" \/><\/td><\/tr>\n<\/form>\n<\/table>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">Rezonan\u010dn\u00ed kmito\u010det LC obvodu<\/span><\/strong><\/p>\n\n\n\n<script type=\"text\/javascript\">\nfunction spoctilc(){\ncivka = document.all.lx.value;\nkondenzator = document.all.cx.value;\npi = Math.PI;\nfreq = eval(1\/(2*pi*Math.sqrt(civka*kondenzator))*1000);\n\n\ndocument.getElementById(\"f0\").innerHTML=freq;\n}\n<\/script>\n\n<table border=\"0\">\n<form>\n<tr><th>LC<\/th><\/tr>\n<tr><td>Induk\u010dnost c\u00edvky (v mikrohenry)<\/td><td><input name=\"lx\" type=\"text\" \/><\/td><\/tr>\n<tr><td>Kapacita kondenz\u00e1toru (v pikofaradech):<\/td><td><input name=\"cx\" type=\"text\" \/><\/tr>\n<tr><td>F0:<\/td><td><span id=\"f0\">&nbsp;<\/span>MHz<\/tr>\n<tr><td colspan=\"2\"><input type=\"button\" onclick=\"spoctilc();\" value=\"Spo\u010d\u00edtej\" \/><\/td><\/tr>\n<\/form>\n<\/table>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">Vlnov\u00e1 d\u00e9lka z frekvence<\/span><\/strong><\/p>\n\n\n\n<script type=\"text\/javascript\">\nfunction spoctilambda(){\nfrekvence = document.all.fx.value;\nlambdaval = eval(300\/frekvence);\n\n\ndocument.getElementById(\"lambda\").innerHTML=lambdaval;\n}\n<\/script>\n\n<table border=\"0\">\n<form>\n<tr><th>&lambda;<\/th><\/tr>\n<tr><td>Frekvence v MHz<\/td><td><input name=\"fx\" type=\"text\" \/><\/td><\/tr>\n<tr><td>Vlnov\u00e1 d\u00e9lka v metrech:<\/td><td><span id=\"lambda\">&nbsp;<\/span><\/tr>\n<tr><td colspan=\"2\"><input type=\"button\" onclick=\"spoctilambda();\" value=\"Spo\u010d\u00edtej\" \/><\/td><\/tr>\n<\/form>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Ob\u010das se hod\u00ed spo\u010d\u00edtat r\u016fzn\u00e9 veli\u010diny, a i kdy\u017e je na internetu podobn\u00fdch kalkula\u010dek plno, l\u00edbilo by se mi je m\u00edt po ruce na jednom m\u00edst\u011b. Proto jich sem p\u00e1r postupn\u011b vlo\u017e\u00edm, prim\u00e1rn\u011b pro sebe, ale nebojte se je pou\u017e\u00edt &hellip; <a href=\"http:\/\/tuxik.cz\/?p=277\">Cel\u00fd p\u0159\u00edsp\u011bvek <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1],"tags":[],"_links":{"self":[{"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/posts\/277"}],"collection":[{"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tuxik.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=277"}],"version-history":[{"count":27,"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/posts\/277\/revisions"}],"predecessor-version":[{"id":309,"href":"http:\/\/tuxik.cz\/index.php?rest_route=\/wp\/v2\/posts\/277\/revisions\/309"}],"wp:attachment":[{"href":"http:\/\/tuxik.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tuxik.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=277"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tuxik.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}