{"id":1722,"date":"2018-11-04T15:46:20","date_gmt":"2018-11-04T13:46:20","guid":{"rendered":"http:\/\/racov.ro\/?p=1722"},"modified":"2018-11-15T11:06:44","modified_gmt":"2018-11-15T09:06:44","slug":"senzor-crepuscular-reglabil","status":"publish","type":"post","link":"https:\/\/racov.ro\/index.php\/2018\/11\/04\/senzor-crepuscular-reglabil\/","title":{"rendered":"Senzor crepuscular reglabil"},"content":{"rendered":"<p>Senzorul crepuscular aprinde lumina c\u00e2nd se las\u0103 seara \u0219i o stinge c\u00e2nd se face ziu\u0103. Automat.<br \/>\nAcum, pragul la care se face comutarea e de obicei fix la senzorii din comer\u021bul larg. C\u00e2t \u00eel face produc\u0103torul, at\u00e2t e.<\/p>\n<p>Ce te faci \u00eens\u0103 dac\u0103 nu \u00ee\u021bi place? Dac\u0103 vrei s\u0103 se aprind\u0103 c\u00e2nd s-a f\u0103cut foarte sear\u0103 \u0219i s\u0103 se sting\u0103 la prima raz\u0103 de soare? Tu vezi bine \u00een lumin\u0103 slab\u0103 \u0219i nu ai nevoie de bec \ud83d\ude00 .<\/p>\n<p>Iei senzorul \u0219i \u00eel demontezi.<\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/3d\/92\/d5\/3d92d585d8691b852ee023ef462cb2d8.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/9a\/d8\/ac\/9ad8ac55fd3a537176f6c38cea5707ec.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/c0\/cb\/f3\/c0cbf3830a9e6cdd93fe43c730aa2317.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p>Foto-rezisten\u021ba e un element semiconductor care \u00ee\u0219i mic\u0219oreaz\u0103 rezisten\u021ba ohmic\u0103 cu cre\u0219terea intensit\u0103\u021bii luminoase.<br \/>\nCu un pic de <em>reverse-engineering<\/em> am ob\u021binut asta:<\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/c7\/aa\/5a\/c7aa5a031dd17ed331ab14ef42a3f091.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p>\u0218i apoi schema.<\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/a7\/41\/19\/a741192f0bd1cd991f9d723855f2abdc.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p>Grupul R2-fotorezistor comand\u0103 primul tranzistor T1, deci cuplarea releului prin T2- aprinderea\/stingerea luminii. Am \u00eenlocuit rezisten\u021ba de 1M\u03a9 cu un semireglabil de aceea\u0219i valoare.<\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/8f\/d4\/c7\/8fd4c77d54bf03d7b3e4930d55a28d79.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/a8\/b6\/d5\/a8b6d52755bf324a85151a7f16d73066.jpg?w=840&#038;ssl=1\" \/><\/p>\n<p>Dup\u0103 c\u00e2teva reglaje fine, am reu\u0219it s\u0103-l fac s\u0103 cupleze\/decupleze la nivelul de lumin\u0103 ambiental\u0103 dorit de mine. Altfel, din fabric\u0103, se aprindea lumina \u0219i la un pic de umbr\u0103 \ud83d\ude0e .<\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>O ultim\u0103 observa\u021bie.<br \/>\n<\/strong><\/em><\/span>Se pare c\u0103 reac\u021bia negativ\u0103 prin R3, \u00eempreun\u0103 cu C1, formeaz\u0103 un circuit de stabilitate, adic\u0103 \u00eempiedic\u0103 montajul s\u0103 basculeze intr-una, atunci c\u00e2nd lumina ambiental\u0103 e chiar la pragul de comutare. Din p\u0103cate formeaz\u0103 un histerezis cam mare, adic\u0103 releul cupleaz\u0103 la un prag de \u00eentuneric, dar c\u00e2nd se face iar ziu\u0103, trebuie s\u0103 a\u0219tep\u021bi s\u0103 creasc\u0103 destul de mult lumina pentru ca releul s\u0103 decupleze la loc.<br \/>\nA\u0219 mic\u0219ora C1 la 10 sau chiar la 1\u03bcF, dac\u0103 a\u0219 avea <del>chef<\/del> timp&#8230; dar nu acum. Poate mai t\u00e2rziu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Senzorul crepuscular aprinde lumina c\u00e2nd se las\u0103 seara \u0219i o stinge c\u00e2nd se face ziu\u0103. Automat. Acum, pragul la care<\/p>\n","protected":false},"author":1,"featured_media":1723,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[2],"tags":[],"class_list":["post-1722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/racov.ro\/wp-content\/uploads\/2018\/11\/PerfectExposure-1.jpg?fit=700%2C350&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p75FkB-rM","jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/comments?post=1722"}],"version-history":[{"count":4,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1722\/revisions"}],"predecessor-version":[{"id":1769,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1722\/revisions\/1769"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/media\/1723"}],"wp:attachment":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/media?parent=1722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/categories?post=1722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/tags?post=1722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}