{"id":275,"date":"2014-08-17T09:15:02","date_gmt":"2014-08-17T07:15:02","guid":{"rendered":"http:\/\/jvelektronika.cz\/?page_id=275"},"modified":"2015-02-14T16:35:29","modified_gmt":"2015-02-14T15:35:29","slug":"hledac-elektrickeho-vedeni","status":"publish","type":"page","link":"https:\/\/jvelektronika.cz\/?page_id=275","title":{"rendered":"Hleda\u010d elektrick\u00e9ho veden\u00ed"},"content":{"rendered":"
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Hleda\u010d elektrick\u00e9ho veden\u00ed<\/h1>\n<\/div>\n
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01.05.2013 08:57<\/ins><\/p>\n

Hleda\u010d elektrick\u00e9ho veden\u00ed<\/h1>\n
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V\u00edce zd<\/div>\n<\/div>\n

Toto sch\u00e9ma nen\u00ed p\u0159evzat\u00e9 z jin\u00e9ho webu apod.<\/h4>\n

Dal\u0161\u00ed \u0161\u00ed\u0159en\u00ed bez m\u00e9ho souhlasu je zak\u00e1z\u00e1no!!!<\/p>\n

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<\/div>\n<\/div>\n

Detektor el. veden\u00ed ve zdi<\/h3>\n

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Toto za\u0159\u00edzen\u00ed jsem vyrobyl ji\u017e na z\u00e1kladn\u00ed \u0161kole a tehdy se mi v\u017edy tranzistor typu JFET BF245 odp\u00e1lil a j\u00e1 p\u0159i\u0161el na to, \u017ee ho lze nahradit germaniov\u00fdm tranzistorem. Bohu\u017eel si ji\u017e nepamatuji na typ toho tranzistoru, ale v\u00edm to, \u017ee byl \u010dern\u00fd s pozlacen\u00fdmy v\u00fdvody. Bohu\u017eel se mi toto za\u0159\u00edzen\u00ed nedochovalo a ji\u017e ho nem\u00e1m.<\/p>\n

Na hrot m\u016f\u017eet\u00e9 pou\u017e\u00edt klasick\u00fd h\u0159eb\u00edk dlouh\u00fd cca. 5cm co\u017e jsem pou\u017eil i j\u00e1.<\/p>\n

Ve sch\u00e9matu je sice zna\u010dka reproduktoru, ale ten lze pou\u017e\u00edt jedin\u011b v p\u0159\u00edpad\u011b, \u017ee by jste p\u0159ed n\u011bj dali zesilova\u010d. Mus\u00edte pou\u017e\u00edt klasick\u00e9 sluch\u00e1tko, t\u0159eba od st\u00e1r\u00e9ho p\u0159ehr\u00e1va\u010de, nebo u \u010d\u00ed\u0148an\u016f se d\u00e1 sehnad za cca. 20k\u010d stereo sluch\u00e1tka s konektorem jack 3,5mm.<\/p>\n

Toto za\u0159\u00edzen\u00ed je vysoce citliv\u00e9, ale nelze ho ladit. Je\u0161t\u011b p\u0159ipomenu, \u017ee na tranzistor BF245 by se nem\u011blo \u0161ahat rukama a p\u00e1jet trafop\u00e1je\u010dkou, ale pouze mikrop\u00e1jkou, jinak ho odp\u00e1l\u00edte.<\/p>\n

V\u00fdstup JFET tranzistoru nen\u00ed chr\u00e1n\u011bn a proto bych se ant\u00e9ny ( hrotu ) nedot\u00fdkal.<\/p>\n

P\u0159i detekci el. veden\u00ed ve sluch\u00e1tku usly\u0161\u00edte brum co\u017e znamen\u00e1, \u017ee jste na\u0161li veden\u00ed, nebo t\u0159eba jste u z\u00e1suvky. Brum usly\u0161\u00edte tak\u00e9 u televize a dal\u0161\u00edch v\u011bc\u00ed, m\u011b to fungovalo i na karmu, ale ta byla nap\u00e1jeno elekt\u0159inou, ale jinak byla plynov\u00e1.<\/p>\n

Za\u0159\u00edzen\u00ed odeb\u00edr\u00e1 cca. 5,4mA a je n\u00e1p\u00e1jeno 9V bateri\u00ed.<\/p>\n

 <\/p>\n

\"detektel\"<\/a><\/p>\n

 <\/p>\n

Za p\u0159\u00edpadn\u00e9 \u0161kody na majetku, nebo ujm\u011b na zdrav\u00ed nenesu \u017e\u00e1dnou odpov\u011bdnost!!!<\/p>\n<\/div>\n<\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Hleda\u010d elektrick\u00e9ho veden\u00ed 01.05.2013 08:57 Hleda\u010d elektrick\u00e9ho veden\u00ed V\u00edce zd Toto sch\u00e9ma nen\u00ed p\u0159evzat\u00e9 z jin\u00e9ho webu apod. Dal\u0161\u00ed \u0161\u00ed\u0159en\u00ed bez m\u00e9ho souhlasu je zak\u00e1z\u00e1no!!! Detektor el. veden\u00ed ve zdi   Toto za\u0159\u00edzen\u00ed jsem vyrobyl ji\u017e na z\u00e1kladn\u00ed \u0161kole a tehdy se mi v\u017edy tranzistor typu JFET BF245 odp\u00e1lil a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":254,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/275"}],"collection":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=275"}],"version-history":[{"count":3,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/275\/revisions"}],"predecessor-version":[{"id":870,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/275\/revisions\/870"}],"up":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/254"}],"wp:attachment":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}